PT-2026-43967 · Linux · Linux Kernel
CVE-2026-46099
·
Published
2026-05-27
·
Updated
2026-07-21
CVSS v3.1
8.1
High
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A use-after-free issue exists in the Linux kernel network subsystem. The functions
seg6 input core() and rpl input() call ip6 route input(), which assigns a NOREF destination (dst) to the socket buffer (skb). This destination is then passed to dst cache set ip6(), which invokes dst hold() unconditionally. On systems using PREEMPT RT, a race condition can occur where a higher-priority task releases the underlying pcpu rt via a concurrent FIB lookup on a shared nexthop between the initial lookup and the caching process. This results in dst hold() being called on a dead destination, leading to a system warning or a use-after-free scenario.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel