CVE-2024-26981
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.27%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.27% probability · 20th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-129
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/054f29e9ca05be3906544c5f2a2c7321c30a4243Patch
- https://git.kernel.org/stable/c/2382eae66b196c31893984a538908c3eb7506ff9Patch
- https://git.kernel.org/stable/c/7061c7efbb9e8f11ce92d6b4646405ea2b0b4de1Patch
- https://git.kernel.org/stable/c/897ac5306bbeb83e90c437326f7044c79a17c611Patch
- https://git.kernel.org/stable/c/90823f8d9ecca3d5fa6b102c8e464c62f416975fPatch
- https://git.kernel.org/stable/c/90f43980ea6be4ad903e389be9a27a2a0018f1c8Patch
- https://git.kernel.org/stable/c/bdbe483da21f852c93b22557b146bc4d989260f0Patch
- https://git.kernel.org/stable/c/c4a7dc9523b59b3e73fd522c73e95e072f876b16Patch
- https://git.kernel.org/stable/c/054f29e9ca05be3906544c5f2a2c7321c30a4243Patch
- https://git.kernel.org/stable/c/2382eae66b196c31893984a538908c3eb7506ff9Patch
- https://git.kernel.org/stable/c/7061c7efbb9e8f11ce92d6b4646405ea2b0b4de1Patch
- https://git.kernel.org/stable/c/897ac5306bbeb83e90c437326f7044c79a17c611Patch
- https://git.kernel.org/stable/c/90823f8d9ecca3d5fa6b102c8e464c62f416975fPatch
- https://git.kernel.org/stable/c/90f43980ea6be4ad903e389be9a27a2a0018f1c8Patch
- https://git.kernel.org/stable/c/bdbe483da21f852c93b22557b146bc4d989260f0Patch
- https://git.kernel.org/stable/c/c4a7dc9523b59b3e73fd522c73e95e072f876b16Patch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.