What is CVE-2026-53040?

CVE-2026-53040 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.1/10. Published 2026-06-24.

How severe is CVE-2026-53040?

High severity. CVSS v3 base score is 7.1 out of 10.

Use After Free in Linux

CVE-2026-53040

In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate bg_bits during freefrag scan [BUG] A crafted filesystem can trigger an out-of-bounds bitmap walk when OCFS2_IOC_INFO is issued with OCFS2_INFO_FL_NON_COH…

Vulnerability class: Use-After-Free

EPSS: 0.001 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Affected products

Linux — versions d24a10b9f8ed548981696cd36e2b4f16e6f360b1, 3.0, 0
Linux Linux_kernel

Weakness classification (CWE)

CWE-416 — Use After Free

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-2026-53040?: CVE-2026-53040 is a high-severity vulnerability in Linux, classified under Use After Free. CVSS score: 7.1/10. Published 2026-06-24.
How severe is CVE-2026-53040?: High severity. CVSS v3 base score is 7.1 out of 10.