CVE-2025-21858

HIGHNVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-03-12. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2025-6291 (ENISA EUVD) · GHSA-r9xq-fh23-wm6f (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

geneve: Fix use-after-free in geneve_find_dev().

syzkaller reported a use-after-free in geneve_find_dev() [0] without repro.

geneve_configure() links struct geneve_dev.next to net_generic(net, geneve_net_id)->geneve_list.

The net here could differ from dev_net(dev) if IFLA_NET_NS_PID, IFLA_NET_NS_FD, or IFLA_TARGET_NETNSID is set.

When dev_net(dev) is dismantled, geneve_exit_batch_rtnl() finally calls unregister_netdevice_queue() for each dev in the netns, and later the dev is freed.

However, its geneve_dev.next is still linked to the backend UDP socket netns.

Then, use-after-free will occur when another geneve dev is created in the netns.

Let's call geneve_dellink() instead in geneve_destroy_tunnels().

[0]: BUG: KASAN: slab-use-after-free in geneve_find_dev drivers/net/geneve.c:1295 [inline] BUG: KASAN: slab-use-after-free in geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 Read of size 2 at addr ffff000054d6ee24 by task syz.1.4029/13441

CPU: 1 UID: 0 PID: 13441 Comm: syz.1.4029 Not tainted 6.13.0-g0ad9617c78ac #24 dc35ca22c79fb82e8e7bc5c9c9adafea898b1e3d Hardware name: linux,dummy-virt (DT) Call trace: show_stack+0x38/0x50 arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xbc/0x108 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x16c/0x6f0 mm/kasan/report.c:489 kasan_report+0xc0/0x120 mm/kasan/report.c:602 __asan_report_load2_noabort+0x20/0x30 mm/kasan/report_generic.c:379 geneve_find_dev drivers/net/geneve.c:1295 [inline] geneve_configure+0x234/0x858 drivers/net/geneve.c:1343 geneve_newlink+0xb8/0x128 drivers/net/geneve.c:1634 rtnl_newlink_create+0x23c/0x868 net/core/rtnetlink.c:3795 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x618/0x838 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x5fc/0x8b0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x410/0x6f8 net/socket.c:2568 ___sys_sendmsg+0x178/0x1d8 net/socket.c:2622 __sys_sendmsg net/socket.c:2654 [inline] __do_sys_sendmsg net/socket.c:2659 [inline] __se_sys_sendmsg net/socket.c:2657 [inline] __arm64_sys_sendmsg+0x12c/0x1c8 net/socket.c:2657 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x90/0x278 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x13c/0x250 arch/arm64/kernel/syscall.c:132 do_el0_svc+0x54/0x70 arch/arm64/kernel/syscall.c:151 el0_svc+0x4c/0xa8 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x1a0 arch/arm64/kernel/entry.S:600

Allocated by task 13247: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x30/0x68 mm/kasan/common.c:68 kasan_save_alloc_info+0x44/0x58 mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x84/0xa0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_noprof+0x2a0/0x560 mm/slub.c:4304 __kvmalloc_node_noprof+0x9c/0x230 mm/util.c:645 alloc_netdev_mqs+0xb8/0x11a0 net/core/dev.c:11470 rtnl_create_link+0x2b8/0xb50 net/core/rtnetlink.c:3604 rtnl_newlink_create+0x19c/0x868 net/core/rtnetlink.c:3780 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1054/0x1630 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x61c/0x918 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1dc/0x398 net/netlink/af_netlink.c:2543 rtnetlink_rcv+0x34/0x50 net/core/rtnetlink.c:6938 netlink_unicast_kernel net/netlink/af_n ---truncated---

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.2%
EPSS %ILE
16th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 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 low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 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 total (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

March 12, 2025

Last Modified

October 15, 2026

Advisory Details (10)

Auto-updated May 12, 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

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f74f6560146714241c6e167b03165ee77a86e316
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/da9b0ae47f084014b1e4b3f31f70a0defd047ff3
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d5e86e27de0936f3cb0a299ce519d993e9cf3886
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9593172d93b9f91c362baec4643003dc29802929
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/904e746b2e7fa952ab8801b303ce826a63153d78
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/788dbca056a8783ec063da3c9d49a3a71c76c283
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5a0538ac6826807d6919f6aecbb8996c2865af2c
Web page

geneve: Fix use-after-free in geneve_find_dev(). - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3ce92ca990cfac88a87c61df3cc0b5880e688ecf

Vendor Advisories for CVE-2025-21858(7)

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-tools-gke-5.15 (5.15.0.1081.80) @ jammy2026-10-28ubuntu
ubuntulinux-tools-aws-fips (5.15.0.1084.80) @ jammy2026-10-28ubuntu
ubuntulinux-tools-aws (6.11.0-1014.15) @ oracular2026-10-28ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1144.154~18.04.1) @ bionic2026-10-28ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-10-28ubuntu
ubuntulinux-tools-oracle-64k (6.11.0-1016.17) @ oracular2026-10-28ubuntu
ubuntulinux-tools-aws-edge (5.4.0.1146.156~18.04.1) @ bionic2026-10-28ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1092.97~18.04.1) @ bionic2026-10-28ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-10-28ubuntu
ubuntulinux-tools-iot (5.4.0.1051.49) @ focal2026-10-28ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1050.54) @ jammy2026-10-28ubuntu
ubuntulinux-tools-fips (5.4.0.1120.117) @ focal2026-10-28ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1083.79) @ jammy2026-10-28ubuntu
ubuntulinux-tools-azure-fips (5.4.0.1151.88) @ focal2026-10-28ubuntu
ubuntulinux-tools-azure-nvidia-lts-24.04 (6.8.0-1022.23) @ noble2026-10-28ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1064 (5.4.0-1064.68) @ focal2026-10-28ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.216.236~18.04.1) @ bionic2026-10-28ubuntu
ubuntulinux-tools-ibm-lts-20.04 (5.4.0.1092.121) @ focal2026-10-28ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2028.29) @ noble2026-10-28ubuntu
ubuntulinux-tools-nvidia-tegra-rt (5.15.0.1037.37) @ jammy2026-10-28ubuntu
ubuntulinux-tools-bluefield (5.4.0.1105.101) @ focal2026-10-28ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1035.39) @ noble2026-10-28ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.216.208) @ focal2026-10-28ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1032.33) @ noble2026-10-28ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.140.135) @ jammy2026-10-28ubuntu
redhatkernel-0:4.18.0-305.194.1.el8_42026-06-17redhat
redhatkernel-0:4.18.0-372.196.1.el8_62026-06-17redhat
redhatkernel-0:4.18.0-477.147.1.el8_82026-06-17redhat
redhatkernel-0:4.18.0-553.132.1.el8_102026-06-10redhat
redhatkernel-rt-0:4.18.0-553.132.1.rt7.473.el8_102026-06-10redhat
linuxKernel @ 5.4.291 (fixes >=4.2.0)—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 6.12.17-1: fixed in 6.12.17-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.12.17-1: fixed in 6.12.17-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(19)

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 9× in last 7d / 46× 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 243 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 147 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 0.2% · 16th percentile
  2. 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  3. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  4. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  5. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  6. 2026-10-28 04:56 UTCEG score recompute
  7. 2026-10-28 04:56 UTCVendor advisory
  8. 2026-10-28 04:55 UTCGHSA enrichmentGHSA-r9xq-fh23-wm6f · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  10. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  11. 2026-10-25 16:42 UTCEG score recompute
  12. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  13. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  14. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  15. 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  16. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  17. 2026-10-21 10:41 UTCEG score recompute
  18. 2026-10-21 10:41 UTCVendor advisory
  19. 2026-10-21 10:41 UTCGHSA enrichmentGHSA-r9xq-fh23-wm6f · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  21. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  22. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  23. 2026-10-18 05:46 UTCEG score recompute
  24. 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  25. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.2% · 15th percentile
Show 71 more
  1. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  2. 2026-10-15 02:40 UTCVendor advisory
  3. 2026-10-15 02:39 UTCGHSA enrichmentGHSA-r9xq-fh23-wm6f · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-10-15 01:44 UTCEG score recompute
  5. 2026-10-15 01:44 UTCVendor advisory
  6. 2026-10-15 01:44 UTCGHSA enrichmentGHSA-r9xq-fh23-wm6f · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  9. 2026-10-12 17:19 UTCEG score recompute
  10. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  11. 2026-10-11 20:51 UTCEG score recompute
  12. 2026-10-11 19:01 UTCEG score recompute
  13. 2026-10-11 15:41 UTCEG score recompute
  14. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  15. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  16. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  21. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-10-02 16:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  27. 2026-09-27 03:45 UTCOSV refresh
  28. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  31. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  32. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  33. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  34. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  35. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  36. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  37. 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  38. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  39. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  40. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  41. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  42. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  43. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  44. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  45. 2026-09-07 13:17 UTCOSV refresh
  46. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  47. 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  48. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  49. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  50. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  51. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  52. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  53. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  54. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  55. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  56. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  57. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  58. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  59. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  60. 2026-08-20 22:31 UTCOSV refresh
  61. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  62. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  63. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  64. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  65. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  66. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  67. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  68. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  69. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  70. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  71. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.2% · 14th percentile

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Frequently asked(5)

What is CVE-2025-21858?
CVE-2025-21858 is a high-severity vulnerability; its CVE record was published on March 12, 2025. In the Linux kernel, the following vulnerability has been resolved: geneve: Fix use-after-free in geneve_find_dev(). syzkaller reported a use-after-free in geneve_find_dev() [0] without repro. geneve_configure() links struct geneve_dev.next to net_generic(net, geneve_net_id)->geneve_list. The net…
When was the CVE record for CVE-2025-21858 published?
The CVE record for CVE-2025-21858 was published on March 12, 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-2025-21858 actively exploited?
CVE-2025-21858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-21858?
CVE-2025-21858 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-21858?
A fix for CVE-2025-21858 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-21858 are linked in the Vendor Advisories panel on this page.

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