Bug 2493732 (CVE-2026-53287)

Summary: CVE-2026-53287 kernel: audit: fix incorrect inheritable capability in CAPSET records
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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OS: Linux   
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Description OSIDB Bzimport 2026-06-26 21:03:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

audit: fix incorrect inheritable capability in CAPSET records

__audit_log_capset() records the effective capability set into the
inheritable field due to a copy-paste error. Every CAPSET audit
record therefore reports cap_pi (process inheritable) with the value
of cap_effective instead of cap_inheritable.

This silently corrupts audit data used for compliance and forensic
analysis: an attacker who modifies inheritable capabilities to
prepare for a privilege-escalating exec would have the change masked
in the audit trail.

The bug has been present since the original introduction of CAPSET
audit records in 2008.
Comment 1 Mauro Matteo Cascella 2026-06-29 20:02:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062616-CVE-2026-53287-f2c3@gregkh/T