7.8
CWE
129
Advisory Published
CVE Published
Updated

CVE-2024-26981: nilfs2: fix OOB in nilfs_set_de_type

First published: Wed May 01 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.12.5-1
6.12.6-1
Linux Linux kernel>=2.6.30<4.19.313
Linux Linux kernel>=4.20<5.4.275
Linux Linux kernel>=5.5<5.10.216
Linux Linux kernel>=5.11<5.15.157
Linux Linux kernel>=5.16<6.1.88
Linux Linux kernel>=6.2<6.6.29
Linux Linux kernel>=6.7<6.8.8
Linux Linux kernel=6.9-rc1
Linux Linux kernel=6.9-rc2
Linux Linux kernel=6.9-rc3
Linux Linux kernel=6.9-rc4
Debian Debian Linux=10.0

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