Description
In the Linux kernel, the following vulnerability has been resolved: selinux: allow multiple opens of /sys/fs/selinux/policy Currently there can only be a single open of /sys/fs/selinux/policy at any time. This allows any process to block any other process from reading the kernel policy. The original motivation seems to have been a mix of preventing an inconsistent view of the policy size and preventing userspace from allocating kernel memory without bound, but this is arguably equally bad. Eliminate the policy_opened flag and shrink the critical section that the policy mutex is held. While we are making changes here, drop a couple of extraneous BUG_ONs.
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
cee74f47a6baba0ac457e87687fdcf0abd599f0a to < d8cafd0226d5df682d1f4ea978a4318fe3a11210affectedcee74f47a6baba0ac457e87687fdcf0abd599f0a to < 0ed712134a3db0075bfe9a0f8536c48728ec745eaffectedcee74f47a6baba0ac457e87687fdcf0abd599f0a to < c24d2e190b955baf3a95e05d34b192f61bd201b3affectedcee74f47a6baba0ac457e87687fdcf0abd599f0a to < 714362f3779dfa453a78ced32396a72726962a41affectedcee74f47a6baba0ac457e87687fdcf0abd599f0a to < a02cd6805562305f936e807da83e253b719dd965affected
Linux Linux
Default version status: affected
2.6.37affected0 to < 2.6.37unaffected6.6.160 to ≤ 6.6.*unaffected6.12.114 to ≤ 6.12.*unaffected6.18.58 to ≤ 6.18.*unaffected7.0.7 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d8cafd0226d5df682d1f4ea978a4318fe3a11210 ↗
- https://git.kernel.org/stable/c/0ed712134a3db0075bfe9a0f8536c48728ec745e ↗
- https://git.kernel.org/stable/c/c24d2e190b955baf3a95e05d34b192f61bd201b3 ↗
- https://git.kernel.org/stable/c/714362f3779dfa453a78ced32396a72726962a41 ↗
- https://git.kernel.org/stable/c/a02cd6805562305f936e807da83e253b719dd965 ↗