CVE-2026-68140 (GCVE-0-2026-68140)
Vulnerability from cvelistv5
Published
2026-08-10 11:59
Modified
2026-10-19 20:58
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
Version: f0703c80e5156406ad947cb67fe277725b48080f
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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.