Use After Free in Linux

CVE-2026-31446

In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free in update_super_work when racing with umount Commit b98535d09179 ("ext4: fix bug_on in start_this_handle during umount filesystem") moved ext4_u…

Vulnerability class: Use-After-Free

EPSS: 0.000 (2.9th percentile) — read the EPSS interpretation.

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.

Affected products

  • Linux — versions 5.15.203, 6.18.21, 52c3a04f9ec2a16a4204d6274db338cb8d5b2d74
  • Linux Linux_kernel — versions 5.18, 7.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-31446?
CVE-2026-31446 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-04-22.
How severe is CVE-2026-31446?
High severity. CVSS v3 base score is 7.8 out of 10.