CVE-2024-53136: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-53136 is a vulnerability in the Linux kernel related to a data race condition in the shmem_getattr() function. The issue was discovered in November 2024 and affects multiple versions of the Linux kernel including 4.19.323 through 4.19.325, 5.4.285, 5.10.229, 5.15.171, and various other versions (NVD).

The vulnerability stems from a previous fix attempt (commit d949d1d14fa2) that was implemented to address a data race in shmem_getattr(). However, this fix introduced potential deadlocks when accessing tmpfs over NFS. The issue has a CVSS v3.1 base score of 4.7 (Medium) with a vector string of CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H, indicating local access required with high attack complexity (NVD).

The vulnerability can cause deadlocks in the system when accessing tmpfs over NFS. However, as noted by Hugh Dickins, the original issue this attempted to fix "has never been any practical problem" and was mainly implemented to silence a syzkaller bot sanitizer warning (Kernel Patch).

The issue has been resolved by reverting the previous fix (commit d949d1d14fa2) that caused the deadlock problems. This reversion was suggested by Chuck Lever and received acknowledgment from Hugh Dickins. The fix has been implemented across multiple kernel versions through various patch commits (Kernel Patch).