CVE-2025-21959

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.5 from GitHub Security Advisory published 2025-04-01. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2025-9361 (ENISA EUVD) · GHSA-hwhh-xm47-jghm (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree()

Since commit b36e4523d4d5 ("netfilter: nf_conncount: fix garbage collection confirm race"), cpu and jiffies32 were introduced to the struct nf_conncount_tuple.

The commit made nf_conncount_add() initialize conn->cpu and conn->jiffies32 when allocating the struct. In contrast, count_tree() was not changed to initialize them.

By commit 34848d5c896e ("netfilter: nf_conncount: Split insert and traversal"), count_tree() was split and the relevant allocation code now resides in insert_tree(). Initialize conn->cpu and conn->jiffies32 in insert_tree().

BUG: KMSAN: uninit-value in find_or_evict net/netfilter/nf_conncount.c:117 [inline] BUG: KMSAN: uninit-value in __nf_conncount_add+0xd9c/0x2850 net/netfilter/nf_conncount.c:143 find_or_evict net/netfilter/nf_conncount.c:117 [inline] __nf_conncount_add+0xd9c/0x2850 net/netfilter/nf_conncount.c:143 count_tree net/netfilter/nf_conncount.c:438 [inline] nf_conncount_count+0x82f/0x1e80 net/netfilter/nf_conncount.c:521 connlimit_mt+0x7f6/0xbd0 net/netfilter/xt_connlimit.c:72 __nft_match_eval net/netfilter/nft_compat.c:403 [inline] nft_match_eval+0x1a5/0x300 net/netfilter/nft_compat.c:433 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x426/0x2290 net/netfilter/nf_tables_core.c:288 nft_do_chain_ipv4+0x1a5/0x230 net/netfilter/nft_chain_filter.c:23 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook_slow_list+0x24d/0x860 net/netfilter/core.c:663 NF_HOOK_LIST include/linux/netfilter.h:350 [inline] ip_sublist_rcv+0x17b7/0x17f0 net/ipv4/ip_input.c:633 ip_list_rcv+0x9ef/0xa40 net/ipv4/ip_input.c:669 __netif_receive_skb_list_ptype net/core/dev.c:5936 [inline] __netif_receive_skb_list_core+0x15c5/0x1670 net/core/dev.c:5983 __netif_receive_skb_list net/core/dev.c:6035 [inline] netif_receive_skb_list_internal+0x1085/0x1700 net/core/dev.c:6126 netif_receive_skb_list+0x5a/0x460 net/core/dev.c:6178 xdp_recv_frames net/bpf/test_run.c:280 [inline] xdp_test_run_batch net/bpf/test_run.c:361 [inline] bpf_test_run_xdp_live+0x2e86/0x3480 net/bpf/test_run.c:390 bpf_prog_test_run_xdp+0xf1d/0x1ae0 net/bpf/test_run.c:1316 bpf_prog_test_run+0x5e5/0xa30 kernel/bpf/syscall.c:4407 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5813 __do_sys_bpf kernel/bpf/syscall.c:5902 [inline] __se_sys_bpf kernel/bpf/syscall.c:5900 [inline] __ia32_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5900 ia32_sys_call+0x394d/0x4180 arch/x86/include/generated/asm/syscalls_32.h:358 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:387 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:412 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:450 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was created at: slab_post_alloc_hook mm/slub.c:4121 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x915/0xe10 mm/slub.c:4171 insert_tree net/netfilter/nf_conncount.c:372 [inline] count_tree net/netfilter/nf_conncount.c:450 [inline] nf_conncount_count+0x1415/0x1e80 net/netfilter/nf_conncount.c:521 connlimit_mt+0x7f6/0xbd0 net/netfilter/xt_connlimit.c:72 __nft_match_eval net/netfilter/nft_compat.c:403 [inline] nft_match_eval+0x1a5/0x300 net/netfilter/nft_compat.c:433 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x426/0x2290 net/netfilter/nf_tables_core.c:288 nft_do_chain_ipv4+0x1a5/0x230 net/netfilter/nft_chain_filter.c:23 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xf4/0x400 net/netfilter/core.c:626 nf_hook_slow_list+0x24d/0x860 net/netfilter/core.c:663 NF_HOOK_LIST include/linux/netfilter.h:350 [inline] ip_sublist_rcv+0x17b7/0x17f0 net/ipv4/ip_input.c:633 ip_list_rcv+0x9ef/0xa40 net/ip ---truncated---

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
38th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

April 1, 2025

Last Modified

October 15, 2026

Advisory Details (10)

Auto-updated Jul 17, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4193-1] linux-6.1 security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4178-1] linux security update

https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/fda50302a13701d47fbe01e1739c7a51114144fb
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f522229c5563b59b4240261e406779bba6754159
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e8544a5a97bee3674e7cd6bf0f3a4af517fa9146
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/db1e0c0856821c59a32ea3af79476bf20a6beeb2
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d653bfeb07ebb3499c403404c21ac58a16531607
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a62a25c6ad58fae997f48a0749afeda1c252ae51
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2db5baaf047a7c8d6ed5e2cc657b7854e155b7fc
Web page

netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2a154ce766b995494e88d8d117fa82cc6b73dd87

Vendor Advisories for CVE-2025-21959(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(31)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1050.54) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1150.92) @ focal2026-05-30ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.218.238~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.142.152~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-bluefield (5.4.0.1106.102) @ focal2026-05-30ubuntu
ubuntulinux-tools-fips (5.4.0.1121.118) @ focal2026-05-30ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1086.89) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oem-24.04b (6.11.0-1024.24) @ noble2026-05-30ubuntu
ubuntulinux-tools-iot (5.4.0.1051.49) @ focal2026-05-30ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1081.81) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.15.0.1085.75) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1091.100~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-azure-edge (5.4.0.1152.159~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-lowlatency-64k (6.11.0-1015.16) @ oracular2026-05-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1039.42.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-ibm-lts-24.04 (6.8.0-1037.37) @ noble2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-22.04 (6.8.1-1034.35~22.04.1) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1145.155~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-realtime (5.15.0.1086.90) @ jammy2026-05-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.142.137) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1083.89~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.11.0-28.28) @ oracular2026-05-30ubuntu
ubuntulinux-tools-azure-fips (5.15.0.1091.76) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1091.89) @ jammy2026-05-30ubuntu
ubuntulinux-tools-azure-6.11 (6.11.0-1018.18) @ oracular2026-05-30ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1130.161) @ focal2026-05-30ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1083.89~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1080.78) @ jammy2026-05-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-84.84) @ noble2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1040.42~22.04.1) @ jammy2026-05-30ubuntu
linuxKernel @ 5.4.292 (fixes >=4.18.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (45 versions)
  • every version up to 5.10.237-1: fixed in 5.10.237-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.129-1~deb11u1 (7 versions)
  • every version up to 6.1.137-1~deb11u1: fixed in 6.1.137-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (36 versions)
  • every version up to 6.1.133-1: fixed in 6.1.133-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.20-1: fixed in 6.12.20-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.20-1: fixed in 6.12.20-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 204 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 108 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:42 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  2. 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  3. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  4. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  5. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  6. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  7. 2026-10-27 17:25 UTCOSV refresh
  8. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  10. 2026-10-25 16:42 UTCEG score recompute
  11. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  12. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  13. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  14. 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  15. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  16. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  17. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  18. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-10-18 05:46 UTCEG score recompute
  20. 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-10-15 02:52 UTCGHSA enrichmentGHSA-hwhh-xm47-jghm · GitHub CVSS 5.5
  24. 2026-10-15 02:00 UTCEG score recompute
  25. 2026-10-15 02:00 UTCGHSA enrichmentGHSA-hwhh-xm47-jghm · GitHub CVSS 5.5
Show 71 more
  1. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-10-12 17:19 UTCEG score recompute
  4. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-11 20:51 UTCEG score recompute
  6. 2026-10-11 19:01 UTCEG score recompute
  7. 2026-10-11 15:41 UTCEG score recompute
  8. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-02 16:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-09-28 00:49 UTCOSV refresh
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  24. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  27. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  28. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  29. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  31. 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  32. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  33. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  34. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  35. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  36. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  37. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  38. 2026-09-08 08:50 UTCEG score recompute
  39. 2026-09-08 08:49 UTCGHSA enrichmentGHSA-hwhh-xm47-jghm · GitHub CVSS 5.5
  40. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  41. 2026-09-07 13:18 UTCOSV refresh
  42. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  43. 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  44. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  45. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  46. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  47. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  48. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  49. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  50. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  52. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  53. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  54. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  55. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  56. 2026-08-20 22:31 UTCOSV refresh
  57. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  58. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  59. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  60. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  61. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  62. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  63. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  64. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  65. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  66. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  67. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  68. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  69. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  70. 2026-08-05 14:00 UTCEG score recompute
  71. 2026-08-05 14:00 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-21959?
CVE-2025-21959 is a medium-severity vulnerability; its CVE record was published on April 1, 2025. In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: Fully initialize struct nf_conncount_tuple in insert_tree() Since commit b36e4523d4d5 ("netfilter: nf_conncount: fix garbage collection confirm race"), cpu and jiffies32 were introduced to the struct…
When was the CVE record for CVE-2025-21959 published?
The CVE record for CVE-2025-21959 was published on April 1, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2025-21959 actively exploited?
CVE-2025-21959 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-21959?
CVE-2025-21959 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-21959?
A fix for CVE-2025-21959 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-21959 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-21959

Explore →

Is Your Infrastructure Affected by CVE-2025-21959?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs