Description
In the Linux kernel, the following vulnerability has been resolved: apparmor: fix unprivileged local user can do privileged policy management An unprivileged local user can load, replace, and remove profiles by opening the apparmorfs interfaces, via a confused deputy attack, by passing the opened fd to a privileged process, and getting the privileged process to write to the interface. This does require a privileged target that can be manipulated to do the write for the unprivileged process, but once such access is achieved full policy management is possible and all the possible implications that implies: removing confinement, DoS of system or target applications by denying all execution, by-passing the unprivileged user namespace restriction, to exploiting kernel bugs for a local privilege escalation. The policy management interface can not have its permissions simply changed from 0666 to 0600 because non-root processes need to be able to load policy to different policy namespaces. Instead ensure the task writing the interface has privileges that are a subset of the task that opened the interface. This is already done via policy for confined processes, but unconfined can delegate access to the opened fd, by-passing the usual policy check.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
b7fd2c0340eacbee892425e9007647568b7f2a3c to < a407a078cd41b5261b99d822af784bd9f136eb4daffectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < 4cafce4d6d0a66ec27e3af5637c11901d60189faaffectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < 33ee909702e047c94aaf41d4eea35626d509802caffectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < 17debf5586020790b5717f96e5e6a3ca5bb961abaffectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < 0fc63dd9170643d15c25681fca792539e23f4640affectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6affectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < b6a94eeca9c6c8f7c55ad44c62c98324f51ec596affectedb7fd2c0340eacbee892425e9007647568b7f2a3c to < 6601e13e82841879406bf9f369032656f441a425affected
Linux Linux
Default version status: affected
4.11affected0 to < 4.11unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.169 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.77 to ≤ 6.12.*unaffected6.18.18 to ≤ 6.18.*unaffected6.19.8 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/a407a078cd41b5261b99d822af784bd9f136eb4d ↗
- https://git.kernel.org/stable/c/4cafce4d6d0a66ec27e3af5637c11901d60189fa ↗
- https://git.kernel.org/stable/c/33ee909702e047c94aaf41d4eea35626d509802c ↗
- https://git.kernel.org/stable/c/17debf5586020790b5717f96e5e6a3ca5bb961ab ↗
- https://git.kernel.org/stable/c/0fc63dd9170643d15c25681fca792539e23f4640 ↗
- https://git.kernel.org/stable/c/b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6 ↗
- https://git.kernel.org/stable/c/b6a94eeca9c6c8f7c55ad44c62c98324f51ec596 ↗
- https://git.kernel.org/stable/c/6601e13e82841879406bf9f369032656f441a425 ↗
- https://www.qualys.com/2026/03/10/crack-armor.txt ↗