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CVE-2026-53212

kernel: netfilter: nft_tunnel: fix use-after-free on object destroy

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · June 25, 2026

Updated · August 5, 2026

Description

A flaw was found in the Linux kernel's netfilter component, specifically within the nft_tunnel module. This vulnerability occurs due to a use-after-free error when an object is destroyed, where memory is prematurely deallocated while still being referenced by queued network packets. This can lead to system instability or a denial of service (DoS) condition, as subsequent operations attempt to access freed memory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-1341 · Multiple Releases of Same Resource or Handle