Vulnerability in Linux

CVE-2025-39924

In the Linux kernel, the following vulnerability has been resolved: erofs: fix invalid algorithm for encoded extents The current algorithm sanity checks do not properly apply to new encoded extents. Unify the algorithm check with Z_EROFS_COMPRESSION(_RUNTIME)_MAX and ensure consistency with sbi->available_compr_algs.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.4th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-39924: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

  • Linux — versions 1d191b4ca51d73699cb127386b95ac152af2b930, 6.15, 0
  • Linux Kernel — versions 6.17

References

Frequently asked questions

What is CVE-2025-39924?
CVE-2025-39924 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2025-10-01.
How severe is CVE-2025-39924?
High severity. CVSS v3 base score is 7.8 out of 10.