CVE-2025-40078: linux

CVSS: UnknownDeferred
AliasesUBUNTU-CVE-2025-40078DEBIAN-CVE-2025-40078
Published 28-10-2025Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2025-40078 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14.7% 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
0.24%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 52 · Related 47
DLA-4379-1DLA-4404-1DSA-6053-1MGASA-2025-0309MGASA-2025-0310OPENSUSE-SU-2025:15702-1

Timeline

  1. 28-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Explicitly check accesses to bpf_sock_addr Syzkaller found a kernel warning on the following sock_addr program: 0: r0 = 0 1: r2 = *(u32 *)(r1 +60) 2: exit which triggers: verifier bug: error during ctx access conversion (0) This is happening because offset 60 in bpf_sock_addr corresponds to an implicit padding of 4 bytes, right after msg_src_ip4. Access to this padding isn't rejected in sock_addr_is_valid_access and it thus later fails to convert the access. This patch fixes it by explicitly checking the various fields of bpf_sock_addr in sock_addr_is_valid_access. I checked the other ctx structures and is_valid_access functions and didn't find any other similar cases. Other cases of (properly handled) padding are covered in new tests in a subsequent patch.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

+0.02 pp

From 0.22% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.24%

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≥ 1cedee13d25ab118d325f95588c1a084e9317229, < de44cdc50d2dce8718cb57deddf9cf1be9a7759f | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < 76e04bbb4296fb6eac084dbfc27e02ccc744db3e | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < 6d8b1a21fd5c34622b0c3893c61e4a38d8ba53ec | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < 4f00858cd9bbbdf67159e28b85a8ca9e77c83622 | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < cdeafacb4f9ff261a96baef519e29480fd7b1019 | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < fe9d33f0470350558cb08cecb54cf2267b3a45d2 | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < ad8b4fe5617e3c85fc23267f02500c4f3bf0ff69 | ≥ 1cedee13d25ab118d325f95588c1a084e9317229, < 6fabca2fc94d33cdf7ec102058983b086293395f | 4.18

3 vendors · 151 products

References

44 links
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