What is CVE-2026-53039?

CVE-2026-53039 is a medium-severity vulnerability in Linux, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2026-06-24.

How severe is CVE-2026-53039?

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

Vulnerability in Linux

CVE-2026-53039

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate group add input before caching [BUG] OCFS2_IOC_GROUP_ADD can trigger a BUG_ON in ocfs2_set_new_buffer_uptodate(): kernel BUG at fs/ocfs2/uptodate.c:509!…

EPSS: 0.001 (2.4th 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 7909f2bf835376a20d6dbf853eb459a27566eba2, 2.6.25, 0
Linux Linux_kernel

Weakness classification (CWE)

CWE-617 — Reachable Assertion

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

Frequently asked questions

What is CVE-2026-53039?: CVE-2026-53039 is a medium-severity vulnerability in Linux, classified under Reachable Assertion. CVSS score: 5.5/10. Published 2026-06-24.
How severe is CVE-2026-53039?: Medium severity. CVSS v3 base score is 5.5 out of 10.