7.5

CVE-2025-40187: linux

CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2025-40187DEBIAN-CVE-2025-40187
Published 12-11-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-40187 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.64%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 44 · Related 42
DLA-4379-1DLA-4404-1OPENSUSE-SU-2025:20172-1SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1

Timeline

  1. 12-11-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net/sctp: fix a null dereference in sctp_disposition sctp_sf_do_5_1D_ce() If new_asoc->peer.adaptation_ind=0 and sctp_ulpevent_make_authkey=0 and sctp_ulpevent_make_authkey() returns 0, then the variable ai_ev remains zero and the zero will be dereferenced in the sctp_ulpevent_free() function.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

+0.04 pp

From 0.60% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.64%

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

Ubuntu149 products
  • linuxAll versions (No fix recorded) | < 5.15.0-170.180 | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1100.107 | < 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< 6.1.158-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 1014b83778c8677f1d7a57c26dc728baa801ac62 | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 7f702f85df0266ed7b5bab81ba50394c92f3c928 | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < dbceedc0213e75bf3e9f9f9e2f66b10699d004fe | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 025419f4e216a3ae0d0cec622262e98e8078c447 | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < c21f45cfa4a9526b34d76b397c9ef080668b6e73 | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < d0e8f1445c19b1786759ba72a38267e1449bab7e | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < badbd79313e6591616c1b78e29a9b71efed7f035 | ≥ 30f6ebf65bc46161c5aaff1db2e6e7c76aa4a06b, < 2f3119686ef50319490ccaec81a575973da98815 | 4.17

3 vendors · 151 products

References

42 links
Show all 42 references