CVE-2025-40279: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40279DEBIAN-CVE-2025-40279
Published 06-12-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2025-40279 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 8.8% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.20%
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. 06-12-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: sched: act_connmark: initialize struct tc_ife to fix kernel leak In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.20%

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

Ubuntu153 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 | < 6.17.9-1
Linux1 product
  • linux≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 218b67c8c8246d47a2a7910eae80abe4861fe2b7 | ≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 73cc56c608c209d3d666cc571293b090a471da70 | ≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 31e4aa93e2e5b5647fc235b0f6ee329646878f9e | ≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 51cb05d4fd632596816ba44e882e84db9fb28a7e | ≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 25837889ec062f2b7618142cd80253dff3da5343 | ≥ 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae, < 62b656e43eaeae445a39cd8021a4f47065af4389 | 4.0

3 vendors · 155 products

References

36 links
Show all 36 references