CVE-2023-53867

Summary

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

ceph: fix potential use-after-free bug when trimming caps

When trimming the caps and just after the 'session->s_cap_lock' is released in ceph_iterate_session_caps() the cap maybe removed by another thread, and when using the stale cap memory in the callbacks it will trigger use-after-free crash.

We need to check the existence of the cap just after the 'ci->i_ceph_lock' being acquired. And do nothing if it's already removed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2f2dc053404febedc9c273452d9d518fb31fde72 < 2b2515b8095cf2149bef44383a99d5b5677f1831affected
LinuxLinux2f2dc053404febedc9c273452d9d518fb31fde72 < 448875a73e16ba7d81dec9274ce9d33a12d092fbaffected
LinuxLinux2f2dc053404febedc9c273452d9d518fb31fde72 < ae6e935618d99cdba11eab4714092e7e5f13cf7eaffected
LinuxLinux2f2dc053404febedc9c273452d9d518fb31fde72 < aaf67de78807c59c35bafb5003d4fb457c764800affected
LinuxLinux2.6.34affected
LinuxLinux0 < 2.6.34unaffected
LinuxLinux6.1.28 <= 6.1.*unaffected
LinuxLinux6.2.15 <= 6.2.*unaffected
LinuxLinux6.3.2 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References