CVE-2025-40343

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-09. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2025-201859 (ENISA EUVD) · GHSA-247j-3qhv-rpc8 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

nvmet-fc: avoid scheduling association deletion twice

When forcefully shutting down a port via the configfs interface, nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and then nvmet_disable_port(). Both functions will eventually schedule all remaining associations for deletion.

The current implementation checks whether an association is about to be removed, but only after the work item has already been scheduled. As a result, it is possible for the first scheduled work item to free all resources, and then for the same work item to be scheduled again for deletion.

Because the association list is an RCU list, it is not possible to take a lock and remove the list entry directly, so it cannot be looked up again. Instead, a flag (terminating) must be used to determine whether the association is already in the process of being deleted.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
51st
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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)3 days if the affected system is publicly exposed; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

December 9, 2025

Last Modified

October 15, 2026

Advisory Details (6)

Auto-updated Oct 30, 2026
Patch available.
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f2537be4f8421f6495edfa0bc284d722f253841d
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c09ac9a63fc3aaf4670ad7b5e4f5afd764424154
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/85e2ce1920cb511d57aae59f0df6ff85b28bf04d
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/601ed47b2363c24d948d7bac0c23abc8bd459570
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2f4852db87e25d4e226b25cb6f652fef9504360e
Web page

nvmet-fc: avoid scheduling association deletion twice - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/04d17540ef51e2c291eb863ca87fd332259b2d40

Vendor Advisories for CVE-2025-40343(2)

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

Patch Availability(26)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-14.14) @ questing2026-11-01ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1007.7) @ questing2026-11-01ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1011.11) @ noble2026-11-01ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1008.8) @ questing2026-11-01ubuntu
ubuntulinux-virtual-6.8 (6.8.0-106.106) @ noble2026-11-01ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1045.46) @ noble2026-11-01ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1049.52.1) @ noble2026-11-01ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1099.98) @ jammy2026-11-01ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1103.93) @ jammy2026-11-01ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1051.57~22.04.1) @ jammy2026-11-01ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1094.98) @ jammy2026-11-01ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1050.53~22.04.1) @ jammy2026-11-01ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1044.46) @ jammy2026-11-01ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1051.57) @ noble2026-11-01ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2040.41) @ noble2026-11-01ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1097.95) @ jammy2026-11-01ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1109.94) @ jammy2026-11-01ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1052.58+fips1) @ noble2026-11-01ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1109.107) @ jammy2026-11-01ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1110.119~20.04.1) @ focal2026-11-01ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1102.106) @ jammy2026-11-01ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1007.7) @ questing2026-11-01ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1055.55~20.04.1) @ focal2026-11-01ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1029.30) @ noble2026-11-01ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1052.55+fips1) @ noble2026-11-01ubuntu
linuxKernel @ 5.15.197 (fixes >=4.8.0)—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 ... 7.2~rc5-1~exp1 (496 versions)
  • every version on: no fix on record
—
linux-6.16.1.106-3~deb11u1 ... 6.1.158-1~deb11u1 (13 versions)
  • every version up to 6.1.159-1~deb11u1: fixed in 6.1.159-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (45 versions)
  • every version up to 6.1.159-1: fixed in 6.1.159-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.63-1~bpo12+1 (8 versions)
  • every version up to 6.12.63-1: fixed in 6.12.63-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.17.8-1~bpo13+1 (79 versions)
  • every version up to 6.17.8-1: fixed in 6.17.8-1
—

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 28× in last 7d / 101× 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 100 of 297 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. None are among the latest 100 rows. The 197 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 08:14 UTCEG score recompute
  2. 2026-11-02 08:14 UTCVendor advisory
  3. 2026-11-02 08:14 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-11-01 08:00 UTCEG score recompute
  6. 2026-11-01 08:00 UTCVendor advisory
  7. 2026-11-01 08:00 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-10-31 07:46 UTCEG score recompute
  10. 2026-10-31 07:46 UTCVendor advisory
  11. 2026-10-31 07:45 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-10-30 07:31 UTCEG score recompute
  14. 2026-10-30 07:31 UTCVendor advisory
  15. 2026-10-30 07:31 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-29 07:18 UTCEG score recompute
  18. 2026-10-29 07:18 UTCVendor advisory
  19. 2026-10-29 07:17 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-10-28 07:03 UTCEG score recompute
  22. 2026-10-28 07:03 UTCVendor advisory
  23. 2026-10-28 07:03 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-10-27 06:49 UTCEG score recompute
Show 75 more
  1. 2026-10-27 06:49 UTCVendor advisory
  2. 2026-10-27 06:49 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  4. 2026-10-26 03:12 UTCEG score recompute
  5. 2026-10-26 03:12 UTCVendor advisory
  6. 2026-10-26 03:12 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-10-25 16:27 UTCEG score recompute
  9. 2026-10-25 02:57 UTCEG score recompute
  10. 2026-10-25 02:57 UTCVendor advisory
  11. 2026-10-25 02:57 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-24 02:44 UTCEG score recompute
  14. 2026-10-24 02:44 UTCVendor advisory
  15. 2026-10-24 02:43 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-23 02:29 UTCEG score recompute
  18. 2026-10-23 02:29 UTCVendor advisory
  19. 2026-10-23 02:29 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-10-22 02:15 UTCEG score recompute
  22. 2026-10-22 02:15 UTCVendor advisory
  23. 2026-10-22 02:15 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-10-21 02:00 UTCEG score recompute
  26. 2026-10-21 02:00 UTCVendor advisory
  27. 2026-10-21 01:59 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  28. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  29. 2026-10-20 01:45 UTCEG score recompute
  30. 2026-10-20 01:45 UTCVendor advisory
  31. 2026-10-20 01:45 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  33. 2026-10-19 00:45 UTCEG score recompute
  34. 2026-10-19 00:45 UTCVendor advisory
  35. 2026-10-19 00:45 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  37. 2026-10-18 05:34 UTCEG score recompute
  38. 2026-10-18 00:30 UTCEG score recompute
  39. 2026-10-18 00:30 UTCVendor advisory
  40. 2026-10-18 00:29 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  41. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  42. 2026-10-17 00:16 UTCEG score recompute
  43. 2026-10-17 00:15 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  44. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  45. 2026-10-15 22:29 UTCEG score recompute
  46. 2026-10-15 22:29 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-10-15 22:09 UTCEG score recompute
  48. 2026-10-15 22:09 UTCVendor advisory
  49. 2026-10-15 22:09 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  51. 2026-10-14 21:25 UTCEG score recompute
  52. 2026-10-14 21:25 UTCVendor advisory
  53. 2026-10-14 21:25 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  54. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  55. 2026-10-14 12:01 UTCEG score recompute
  56. 2026-10-14 12:01 UTCVendor advisory
  57. 2026-10-14 12:00 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  59. 2026-10-13 11:35 UTCVendor advisory
  60. 2026-10-13 11:34 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  61. 2026-10-12 17:06 UTCEG score recompute
  62. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  63. 2026-10-12 11:21 UTCVendor advisory
  64. 2026-10-12 11:20 UTCGHSA enrichmentGHSA-247j-3qhv-rpc8 · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-10-11 20:38 UTCEG score recompute
  66. 2026-10-11 18:50 UTCEG score recompute
  67. 2026-10-11 15:26 UTCEG score recompute
  68. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  69. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  70. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  71. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  72. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  73. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  74. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  75. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.7% · 49th percentile

Frequently asked(5)

What is CVE-2025-40343?
CVE-2025-40343 is a critical-severity vulnerability; its CVE record was published on December 9, 2025. In the Linux kernel, the following vulnerability has been resolved: nvmet-fc: avoid scheduling association deletion twice When forcefully shutting down a port via the configfs interface, nvmet_port_subsys_drop_link() first calls nvmet_port_del_ctrls() and then nvmet_disable_port(). Both functions…
When was the CVE record for CVE-2025-40343 published?
The CVE record for CVE-2025-40343 was published on December 9, 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-2025-40343 actively exploited?
CVE-2025-40343 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-40343?
CVE-2025-40343 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-40343?
A fix for CVE-2025-40343 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-40343 are linked in the Vendor Advisories panel on this page.

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