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Vulnerability

CVE-2026-46172

Reference data from vuln.mlab.sh, coverage from our own index.

CVSS
7.0 High
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
0.13%
Risk score
1.9
Published
2026-05-28
Status
Published

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. 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.

Weaknesses

CWE-772

Coverage 7

Advisories and references