Bug 2425193 (CVE-2022-50754)

Summary: CVE-2022-50754 kernel: apparmor: fix a memleak in multi_transaction_new()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-24 14:09:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

apparmor: fix a memleak in multi_transaction_new()

In multi_transaction_new(), the variable t is not freed or passed out
on the failure of copy_from_user(t->data, buf, size), which could lead
to a memleak.

Fix this bug by adding a put_multi_transaction(t) in the error path.
Comment 1 Alexander B 2025-12-24 19:40:09 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122453-CVE-2022-50754-ec9a@gregkh/T