CVE-2024-35998: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-35998 is a vulnerability discovered in the Linux kernel's SMB3 implementation, specifically in the cifs_sync_mid_result function. The vulnerability was identified by Coverity on May 20, 2024, and affects various versions of the Linux kernel up to versions 6.1.90, 6.6.30, and 6.8.9 (NVD).

The vulnerability is a potential deadlock condition in the cifs_sync_mid_result function of the SMB3 client implementation. The issue occurs due to improper lock ordering where the function attempts to acquire TCP_Server_Info.srv_lock while already holding TCP_Server_Info.mid_lock, which could lead to a thread deadlock condition. This was identified as Coverity issue 1590401 with the classification "Thread deadlock (ORDER_REVERSAL)" (Kernel Patch). The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium) with vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (NVD).

The vulnerability could result in a system deadlock, potentially causing a denial of service condition in the affected Linux systems. The impact is primarily focused on availability, with no direct impact on confidentiality or integrity as indicated by the CVSS scoring (NVD).

The vulnerability requires local access and low privileges to exploit. The attack complexity is low, but no user interaction is needed for exploitation. There are no known reports of this vulnerability being exploited in the wild (NVD).

The vulnerability has been patched in the Linux kernel. The fix involves modifying the lock handling in the cifs_sync_mid_result function to prevent the deadlock condition. The patch has been reviewed by Shyam Prasad N and implemented by Steve French (Kernel Patch). Users should update their Linux kernel to versions that include this fix.