CVE-2024-46777: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-46777 is a vulnerability in the Linux kernel's UDF (Universal Disk Format) filesystem implementation. The vulnerability was discovered and disclosed on September 18, 2024, affecting multiple versions of the Linux kernel. The issue involves improper handling of partition lengths in the UDF filesystem module, where the system fails to properly validate partition lengths that could overflow 32-bit block numbers (NVD).

The vulnerability exists in the UDF filesystem module where partition lengths are not properly validated. Specifically, the issue occurs when mounting filesystems where the partition would overflow the 32-bits used for block numbers, and when the partition length is so large that it cannot safely index bits in a block bitmap. 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 lead to system instability or denial of service when attempting to mount maliciously crafted UDF filesystems. The impact is primarily focused on availability, as indicated by the CVSS scoring which shows no impact on confidentiality or integrity, but high impact on availability (NVD).

The vulnerability has been patched in various Linux kernel versions. The fix involves adding proper validation checks for partition lengths and implementing safeguards against overflow conditions in the UDF filesystem module. Multiple Linux distributions have released updated kernel packages that include the fix (Kernel Patch).