What is CVE-2026-31666?

CVE-2026-31666 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-04-24.

How severe is CVE-2026-31666?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

CVE-2026-31666

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix incorrect return value after changing leaf in lookup_extent_data_ref() After commit 1618aa3c2e01 ("btrfs: simplify return variables in lookup_extent_data_ref(…

EPSS: 0.001 (2.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Linux — versions 1618aa3c2e0163f5ac34d514ae89474521910536, 6.10, 0
Linux Linux_kernel — versions 6.10, 7.0

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)

Frequently asked questions

What is CVE-2026-31666?: CVE-2026-31666 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-04-24.
How severe is CVE-2026-31666?: High severity. CVSS v3 base score is 7.8 out of 10.