What is CVE-2026-53175?

CVE-2026-53175 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2026-06-25.

How severe is CVE-2026-53175?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Linux

CVE-2026-53175

In the Linux kernel, the following vulnerability has been resolved: inet: frags: fix use-after-free caused by the fqdir_pre_exit() flush On netns teardown, fqdir_pre_exit() walks the fqdir rhashtable and flushes every fragment queue that…

Vulnerability class: Use-After-Free

EPSS: 0.003 (23.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 22ee4010866da81aeee08e1ea3fddbe418feb212, 543555954b1ee8d1903a7020324efb41b0c97428, c70df25214ac9b32b53e18e6ae3b8f073ffa6903
Linux Linux_kernel — versions 6.12.93, 6.19, 7.1

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)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory, Issue Tracking)
0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Third Party Advisory)

Frequently asked questions

What is CVE-2026-53175?: CVE-2026-53175 is a critical-severity vulnerability in Linux, classified under Use After Free. CVSS score: 9.8/10. Published 2026-06-25.
How severe is CVE-2026-53175?: Critical severity. CVSS v3 base score is 9.8 out of 10.