CVE-2022-49180

Summary

In the Linux kernel, the following vulnerability has been resolved:

LSM: general protection fault in legacy_parse_param

The usual LSM hook "bail on fail" scheme doesn't work for cases where a security module may return an error code indicating that it does not recognize an input. In this particular case Smack sees a mount option that it recognizes, and returns 0. A call to a BPF hook follows, which returns -ENOPARAM, which confuses the caller because Smack has processed its data.

The SELinux hook incorrectly returns 1 on success. There was a time when this was correct, however the current expectation is that it return 0 on success. This is repaired.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < ddcdda888e14ca451b3ee83d11b65b2a9c8e783baffected
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < 2784604c8c6fc523248f8f80a421c313a9d790b7affected
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < f3f93a1aaafc3032e0a9655fb43deccfb3e953a3affected
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < 00fc07fa0b4a004711b6e1a944f0d2e46f7093b7affected
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < cadae7c5e477aaafcba819b8e4a3d1c1a1503b62affected
LinuxLinuxda2441fdffbf7602da702aea5bd95ca4dc3d63fc < ecff30575b5ad0eda149aadad247b7f75411fd47affected
LinuxLinux5.1affected
LinuxLinux0 < 5.1unaffected
LinuxLinux5.4.189 <= 5.4.*unaffected
LinuxLinux5.10.110 <= 5.10.*unaffected
LinuxLinux5.15.33 <= 5.15.*unaffected
LinuxLinux5.16.19 <= 5.16.*unaffected
LinuxLinux5.17.2 <= 5.17.*unaffected
LinuxLinux5.18 <= *unaffected

Weaknesses

References