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CVE-2026-46172

kernel: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.1

Review impact separately from score.

Published · May 28, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's IPv6 (Internet Protocol version 6) xfrm6 component. When processing encapsulated IPv6 packets, the xfrm6_rcv_encap() function fails to release a destination (dst) entry reference if an IPv6 route lookup results in an error. A remote attacker could exploit this by sending repeated malformed IPv6 packets, leading to a continuous leak of dst entries and eventually causing a Denial of Service (DoS) due to resource exhaustion.

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-772 · Missing Release of Resource after Effective Lifetime