CVE-2026-46172
ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4
- https://git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13
- https://git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561f
- https://git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90a
- https://git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078
References (11)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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