What is CVE-2026-43308?

CVE-2026-43308 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-05-08.

How severe is CVE-2026-43308?

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

Vulnerability in Linux

CVE-2026-43308

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't BUG() on unexpected delayed ref type in run_one_delayed_ref() There is no need to BUG(), we can just return an error and log an error message.

EPSS: 0.000 (3.0th 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, 5d4f98a28c7d334091c1b7744f48a1acdd2a4ae0, 7.0
Linux Linux_kernel

References

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

Frequently asked questions

What is CVE-2026-43308?: CVE-2026-43308 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2026-05-08.
How severe is CVE-2026-43308?: Medium severity. CVSS v3 base score is 5.5 out of 10.