Bug 2347736 (CVE-2022-49258)

Summary: CVE-2022-49258 kernel: crypto: ccree - Fix use after free in cc_cipher_exit()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: dfreiber, drow, jburrell, rhel-process-autobot, vkumar, watson-tool-maintainers
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OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:04:56 UTC 
In the Linux kernel, the following vulnerability has been resolved:

crypto: ccree - Fix use after free in cc_cipher_exit()

kfree_sensitive(ctx_p->user.key) will free the ctx_p->user.key. But
ctx_p->user.key is still used in the next line, which will lead to a
use after free.

We can call kfree_sensitive() after dev_dbg() to avoid the uaf.
Comment 1 Avinash Hanwate 2025-02-26 21:07:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022628-CVE-2022-49258-0dd7@gregkh/T