Bug 2451184 (CVE-2026-23344)

Summary: CVE-2026-23344 kernel: crypto: ccp - Fix use-after-free on error path
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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A flaw was found in the Linux kernel's crypto: ccp module. A use-after-free vulnerability exists in the `sev_tsm_init_locked()` function's error handling path. This occurs when the system attempts to access memory that has already been released, leading to a memory corruption vulnerability. This could potentially result in system instability or a denial of service (DoS).
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Description OSIDB Bzimport 2026-03-25 11:03:23 UTC 
In the Linux kernel, the following vulnerability has been resolved:

crypto: ccp - Fix use-after-free on error path

In the error path of sev_tsm_init_locked(), the code dereferences 't'
after it has been freed with kfree(). The pr_err() statement attempts
to access t->tio_en and t->tio_init_done after the memory has been
released.

Move the pr_err() call before kfree(t) to access the fields while the
memory is still valid.

This issue reported by Smatch static analyser
Comment 1 Alexander B 2026-03-25 17:35:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032535-CVE-2026-23344-0279@gregkh/T