9.8

CVE-2025-40343: linux

CVSS: 9.8v3.1CriticalDeferred
AliasesUBUNTU-CVE-2025-40343DEBIAN-CVE-2025-40343
Published 09-12-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-40343 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 41 · Related 38
DLA-4436-1MGASA-2026-0017MGASA-2026-0018OPENSUSE-SU-2026:20145-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1

Timeline

  1. 09-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.65%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.65% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.65%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu152 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.159-1 | < 6.12.63-1 | < 6.17.8-1
Linux1 product
  • linux≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < 2f4852db87e25d4e226b25cb6f652fef9504360e | ≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < 85e2ce1920cb511d57aae59f0df6ff85b28bf04d | ≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < 601ed47b2363c24d948d7bac0c23abc8bd459570 | ≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < 04d17540ef51e2c291eb863ca87fd332259b2d40 | ≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < c09ac9a63fc3aaf4670ad7b5e4f5afd764424154 | ≥ a07b4970f464f13640e28e16dad6cfa33647cc99, < f2537be4f8421f6495edfa0bc284d722f253841d | 4.8

3 vendors · 154 products

References

36 links
Show all 36 references