What is CVE-2026-43338?

CVE-2026-43338 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-05-08.

How severe is CVE-2026-43338?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Linux

CVE-2026-43338

In the Linux kernel, the following vulnerability has been resolved: btrfs: reserve enough transaction items for qgroup ioctls Currently our qgroup ioctls don't reserve any space, they just do a transaction join, which does not reserve an…

EPSS: 0.000 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 7.0, 5d13a37bd5327220e13329943d1228acfbe5934a
Linux Linux_kernel — versions 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-2026-43338?: CVE-2026-43338 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-05-08.
How severe is CVE-2026-43338?: Medium severity. CVSS v3 base score is 5.5 out of 10.