PT-2026-44295 · Linux · Linux

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-46172

Mitre

In the Linux kernel, the following vulnerability has been resolved:

ipv6: xfrm6: release dst on error in xfrm6 rcv encap()

xfrm6 rcv encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6 route input lookup() returns a referenced dst entry even when the lookup resolves to an error route.

If dst->error is set, xfrm6 rcv encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries.

Release the dst before jumping to the drop path.

Related Identifiers

CVE-2026-46172

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-46172 · Security Note
• https://git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 · Note
• https://git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561f · Note
• https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a · Note
• https://git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4 · Note
• https://git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078 · Note