Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.8, < 5.10.258 |
References
- https://git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13Patch
- https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90aPatch
- https://git.kernel.org/stable/c/870560015ce6e0d8f841c6a8aba33c44be52c727Patch
- https://git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561fPatch
- https://git.kernel.org/stable/c/a0721bcd72641c32b281f227a94505b31cf54117Patch
- https://git.kernel.org/stable/c/a20b34f6e854fe6f2aa82528fae7a88759919eb4Patch
- https://git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078Patch
- https://git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4Patch
FAQ
What is CVE-2026-46172?
CVE-2026-46172 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 alrea...
How severe is CVE-2026-46172?
CVE-2026-46172 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-46172?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.