7.1

CVE-2025-39902: mm/slub: avoid accessing metadata when pointer is invalid in object_err()

Modified
AliasesUBUNTU-CVE-2025-39902DEBIAN-CVE-2025-39902
Published 01-10-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-39902 is a high (CVSS 7.1) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 34
DLA-4327-1DLA-4328-1OPENSUSE-SU-2025:20081-1RHSA-2026:55764RHSA-2026:55765SUSE-SU-2025:21040-1

Timeline

  1. 01-10-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu148 products
  • linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-106.106
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1050.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.153-1 | < 6.12.48-1 | < 6.16.6-1
  • debian_linuxEOL11.0
Linux2 products
  • linux≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < 872f2c34ff232af1e65ad2df86d61163c8ffad42 | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < f66012909e7bf383fcdc5850709ed5716073fdc4 | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < 7e287256904ee796c9477e3ec92b07f236481ef3 | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < 1f0797f17927b5cad0fb7eced422f9a7c30a3191 | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < 0ef7058b4dc6fcef622ac23b45225db57f17b83f | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < dda6ec365ab04067adae40ef17015db447e90736 | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < 3baa1da473e6e50281324ff1d332d1a07a3bb02e | ≥ 81819f0fc8285a2a5a921c019e3e3d7b6169d225, < b4efccec8d06ceb10a7d34d7b1c449c569d53770 | 2.6.22
  • linux_kernel≥ 2.6.22, < 5.4.299 | ≥ 5.5, < 5.10.243 | ≥ 5.11, < 5.15.192 | ≥ 5.16, < 6.1.151 | ≥ 6.2, < 6.6.105 | ≥ 6.7, < 6.12.46 | ≥ 6.13, < 6.16.6 | 6.17:rc1 | 6.17:rc2 | 6.17:rc3 | 6.17:rc4

3 vendors · 152 products

References

34 links
Show all 34 references