CVE-2024-26981: Debian Linux

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix OOB in nilfs_set_de_type The size of the nilfs_type_by_mode array in the fs/nilfs2/dir.c file is defined as "S_IFMT >> S_SHIFT", but the nilfs_set_de_type() function, which uses this array, specifies the index to read from the array in the same way as "(mode & S_IFMT) >> S_SHIFT". static void nilfs_set_de_type(struct nilfs_dir_entry *de, struct inode *inode) { umode_t mode = inode->i_mode; de->file_type = nilfs_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; // oob } However, when the index is determined this way, an out-of-bounds (OOB) error occurs by referring to an index that is 1 larger than the array size when the condition "mode & S_IFMT == S_IFMT" is satisfied. Therefore, a patch to resize the nilfs_type_by_mode array should be applied to prevent OOB errors.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: from 2.6.30, before 4.19.313 (fixed in 4.19.313); from 4.20, before 5.4.275 (fixed in 5.4.275); from 5.5, before 5.10.216 (fixed in 5.10.216); from 5.11, before 5.15.157 (fixed in 5.15.157); from 5.16, before 6.1.88 (fixed in 6.1.88); from 6.2, before 6.6.29 (fixed in 6.6.29); …

Published 2024-05-01. Last modified 2026-06-17.