CVE-2026-68140net/iucv: fix use-after-free of a severed iucv_path
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f0703c80e5156406ad947cb67fe277725b48080f before 5f08c5e50bcb4680069bd3f9edd5728308816ded; from f0703c80e5156406ad947cb67fe277725b48080f before c24faf11bd31bfe0500aca12cbdd5a573a954a5d; from f0703c80e5156406ad947cb67fe277725b48080f before 99ddb33748698296a6f17b9b34aa3d16a406bb3c; from f0703c80e5156406ad947cb67fe277725b48080f before 23658b350b4107e8292045c2044983fd426fa15d; from f0703c80e5156406ad947cb67fe277725b48080f before a5bbaddf69853117f28173c3f5c8fc14c6b2ec82; from f0703c80e5156406ad947cb67fe277725b48080f before 900cd6d8119b7f3ae5c4bf82f922ff5957df43db; from f0703c80e5156406ad947cb67fe277725b48080f before f579582c03ed526281a8450159baf1d35099a85f; from f0703c80e5156406ad947cb67fe277725b48080f before be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a | CNA record |
References
- https://git.kernel.org/stable/c/5f08c5e50bcb4680069bd3f9edd5728308816ded
- https://git.kernel.org/stable/c/c24faf11bd31bfe0500aca12cbdd5a573a954a5d
- https://git.kernel.org/stable/c/99ddb33748698296a6f17b9b34aa3d16a406bb3c
- https://git.kernel.org/stable/c/23658b350b4107e8292045c2044983fd426fa15d
- https://git.kernel.org/stable/c/a5bbaddf69853117f28173c3f5c8fc14c6b2ec82
- https://git.kernel.org/stable/c/900cd6d8119b7f3ae5c4bf82f922ff5957df43db
- https://git.kernel.org/stable/c/f579582c03ed526281a8450159baf1d35099a85f
- https://git.kernel.org/stable/c/be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.