CVE-2026-68140

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use-after-free of a severed iucv_path af_iucv queues not-yet-received message notifications on iucv->message_q, each holding a raw pointer to the connection's iucv_path. When the peer severs the connection, iucv_sever_path() frees that path with iucv_path_free() but leaves the notifications queued. A later recvmsg() drains message_q via iucv_process_message_q() and hands the stale path to message_receive() -- a use-after-free of the freed iucv_path. Drop the queued notifications when the path is severed; once the path is gone they can no longer be received. This also frees the notifications leaked when a socket is closed with messages still queued.

CVSS 3.1

8.8CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-08-10

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/23658b350b4107e8292045c2044983fd426fa15d
• https://git.kernel.org/stable/c/5f08c5e50bcb4680069bd3f9edd5728308816ded
• https://git.kernel.org/stable/c/900cd6d8119b7f3ae5c4bf82f922ff5957df43db
• https://git.kernel.org/stable/c/99ddb33748698296a6f17b9b34aa3d16a406bb3c
• https://git.kernel.org/stable/c/a5bbaddf69853117f28173c3f5c8fc14c6b2ec82

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