What is CVE-2026-53043?

CVE-2026-53043 is a critical-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-06-24.

How severe is CVE-2026-53043?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Linux

CVE-2026-53043

In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: validate qr_numregions in dlm_match_regions() Patch series "ocfs2/dlm: fix two bugs in dlm_match_regions()". In dlm_match_regions(), the qr_numregions field…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (40.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions ea2034416b54700e30371f2ad6517cbb94674083, 2.6.37, 0
Linux Linux_kernel

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

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-2026-53043?: CVE-2026-53043 is a critical-severity vulnerability in Linux, classified under Out-of-bounds Write. CVSS score: 9.1/10. Published 2026-06-24.
How severe is CVE-2026-53043?: Critical severity. CVSS v3 base score is 9.1 out of 10.