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CVE-2026-80843

kernel: xfrm: fix xfrm_state_construct() auth-trunc leak

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 4, 2026

Updated · October 8, 2026

Description

A flaw was found in the Linux kernel's xfrm (IPSec framework) component. This vulnerability occurs when the xfrm_state_construct() function incorrectly manages memory allocations for authentication algorithms. Specifically, it can overwrite an existing allocation, leading to a memory leak. Over time, this memory leak could potentially lead to a denial of service.

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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime