CVE-2026-53240

kernel: xfrm: iptfs: fix use-after-free on first_skb in __input_process_payload

Loading…

Severity

Moderate

Red Hat Product Security

—

CVSS

Review impact separately from score.

Published · June 25, 2026

Updated · October 20, 2026

Description

A flaw was found in the Linux kernel's xfrm: iptfs component. A race condition during partial packet reassembly in the __input_process_payload() function can lead to a use-after-free vulnerability. This occurs when a concurrent process frees a packet buffer (skb) before it is checked, allowing subsequent operations to access freed memory. This could result in memory corruption.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition