| Name | CVE-2024-26981 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-5680-1, DSA-5681-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | vulnerable |
| buster (security) | 4.19.304-1 | vulnerable | |
| bullseye | 5.10.209-2 | vulnerable | |
| bullseye (security) | 5.10.216-1 | fixed | |
| bookworm | 6.1.76-1 | vulnerable | |
| bookworm (security) | 6.1.90-1 | fixed | |
| trixie | 6.7.12-1 | vulnerable | |
| sid | 6.8.9-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | bullseye | 5.10.216-1 | DSA-5681-1 | ||
| linux | source | bookworm | 6.1.90-1 | DSA-5680-1 | ||
| linux | source | (unstable) | 6.8.9-1 |
https://git.kernel.org/linus/c4a7dc9523b59b3e73fd522c73e95e072f876b16 (6.9-rc5)