Bug 2516640 (CVE-2026-72459)

Summary: CVE-2026-72459 kernel: apparmor: aa_label_alloc use aa_label_free on alloc failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the AppArmor security module of the Linux kernel. The `aa_label_alloc` function, responsible for allocating security labels, did not properly free all allocated resources in its error handling path. This oversight could lead to a memory leak, potentially impacting system stability or resource availability over time.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-15 06:23:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

apparmor: aa_label_alloc use aa_label_free on alloc failure

aa_label_alloc() allocates a secid before allocating or taking the label
proxy. If the later proxy step fails, the error path only freed the label
memory, leaking any resources initialized by aa_label_init().

Use aa_label_free() on the failure path so partially initialized labels
release their secid and other label resources before the backing memory is
freed.
Comment 1 gkamathe 2026-08-19 06:37:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081532-CVE-2026-72459-cda8@gregkh/T