CVE-2026-68140

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf0703c80e5156406ad947cb67fe277725b48080f < 23658b350b4107e8292045c2044983fd426fa15daffected
LinuxLinuxf0703c80e5156406ad947cb67fe277725b48080f < a5bbaddf69853117f28173c3f5c8fc14c6b2ec82affected
LinuxLinuxf0703c80e5156406ad947cb67fe277725b48080f < 900cd6d8119b7f3ae5c4bf82f922ff5957df43dbaffected
LinuxLinuxf0703c80e5156406ad947cb67fe277725b48080f < f579582c03ed526281a8450159baf1d35099a85faffected
LinuxLinuxf0703c80e5156406ad947cb67fe277725b48080f < be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0aaffected
LinuxLinux2.6.24affected
LinuxLinux0 < 2.6.24unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References