What is CVE-2026-31444?

CVE-2026-31444 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2026-04-22.

How severe is CVE-2026-31444?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Linux

CVE-2026-31444

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free and NULL deref in smb_grant_oplock() smb_grant_oplock() has two issues in the oplock publication sequence: 1) opinfo is linked into ci->m_op_l…

Vulnerability class: Use-After-Free

EPSS: 0.001 (20.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 302fef75512b2c8329a3f5efab1ae7ba2562387a, 08aa9f3c8cf4d0bee44df540dfe34e8d64069f2c, 1d6abf145615dbfe267ce3b0a271f95e3780e18e
Linux Linux_kernel — versions 6.6.130, 7.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2026-31444?: CVE-2026-31444 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2026-04-22.
How severe is CVE-2026-31444?: Critical severity. CVSS v3 base score is 9.8 out of 10.