CVE-2024-26981

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 054f29e9ca05be3906544c5f2a2c7321c30a4243affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 90f43980ea6be4ad903e389be9a27a2a0018f1c8affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 7061c7efbb9e8f11ce92d6b4646405ea2b0b4de1affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < bdbe483da21f852c93b22557b146bc4d989260f0affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 897ac5306bbeb83e90c437326f7044c79a17c611affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 2382eae66b196c31893984a538908c3eb7506ff9affected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < 90823f8d9ecca3d5fa6b102c8e464c62f416975faffected
LinuxLinux2ba466d74ed74f073257f86e61519cb8f8f46184 < c4a7dc9523b59b3e73fd522c73e95e072f876b16affected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux4.19.313 <= 4.19.*unaffected
LinuxLinux5.4.275 <= 5.4.*unaffected
LinuxLinux5.10.216 <= 5.10.*unaffected
LinuxLinux5.15.157 <= 5.15.*unaffected
LinuxLinux6.1.88 <= 6.1.*unaffected
LinuxLinux6.6.29 <= 6.6.*unaffected
LinuxLinux6.8.8 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References