CVE-2025-68775 Affecting kernel-uek-doc package, versions <0:6.12.0-108.64.6.3.el9uek
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ORACLE9-KERNELUEKDOC-15328934
- published23 Feb 2026
- disclosed13 Jan 2026
Introduced: 13 Jan 2026
CVE-2025-68775 (opens in a new tab)How to fix?
Upgrade Oracle:9 kernel-uek-doc to version 0:6.12.0-108.64.6.3.el9uek or higher.
This issue was patched in ELSA-2026-50112.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uek-doc package and not the kernel-uek-doc package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
net/handshake: duplicate handshake cancellations leak socket
When a handshake request is cancelled it is removed from the handshake_net->hn_requests list, but it is still present in the handshake_rhashtbl until it is destroyed.
If a second cancellation request arrives for the same handshake request, then remove_pending() will return false... and assuming HANDSHAKE_F_REQ_COMPLETED isn't set in req->hr_flags, we'll continue processing through the out_true label, where we put another reference on the sock and a refcount underflow occurs.
This can happen for example if a handshake times out - particularly if the SUNRPC client sends the AUTH_TLS probe to the server but doesn't follow it up with the ClientHello due to a problem with tlshd. When the timeout is hit on the server, the server will send a FIN, which triggers a cancellation request via xs_reset_transport(). When the timeout is hit on the client, another cancellation request happens via xs_tls_handshake_sync().
Add a test_and_set_bit(HANDSHAKE_F_REQ_COMPLETED) in the pending cancel path so duplicate cancels can be detected.
References
- https://linux.oracle.com/cve/CVE-2025-68775.html
- https://linux.oracle.com/errata/ELSA-2026-50112.html
- https://git.kernel.org/stable/c/011ae80c49d9bfa5b4336f8bd387cd25c7593663
- https://git.kernel.org/stable/c/15564bd67e2975002f2a8e9defee33e321d3183f
- https://git.kernel.org/stable/c/3c330f1dee3cd92b57e19b9d21dc8ce5970b09be
- https://git.kernel.org/stable/c/e1641177e7fb48a0a5a06658d4aab51da6656659