CVE-2026-46172
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.
How to fix
- linux linux_kernel5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7 or later
- git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13
- git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a
- git.kernel.org/stable/c/870560015ce6e0d8f841c6a8aba33c44be52c727
- git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561f
- git.kernel.org/stable/c/a0721bcd72641c32b281f227a94505b31cf54117
- git.kernel.org/stable/c/a20b34f6e854fe6f2aa82528fae7a88759919eb4
- git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078
- git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.8 ≤ v < 5.10.258, 5.11 ≤ v < 5.15.209, 5.16 ≤ v < 6.1.175, 6.2 ≤ v < 6.6.140, 6.7 ≤ v < 6.12.88, 6.13 ≤ v < 6.18.30, 6.19 ≤ v < 7.0.7, 7.1 | 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.18.30, 7.0.7 |
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