CVSS 3.1
7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2023-52804
High (7.8) in linux linux kernel. EPSS 0.3% chance of exploitation in the next 30 days.
In the Linux kernel, the following vulnerability has been resolved:
fs/jfs: Add validity check for db_maxag and db_agpref
Both db_maxag and db_agpref are used as the index of the
db_agfree array, but there is currently no validity check for
db_maxag and db_agpref, which can lead to errors.
The following is related bug reported by Syzbot:
UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dmap.c:639:20
index 7936 is out of range for type 'atomic_t[128]'
Add checking that the values of db_maxag and db_agpref are valid
indexes for the db_agfree array.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 17% of CVEs (scores of 2026-10-31)
- CWE
- CWE-129
- Published
- Modified
- Record from
- the NVD, synced
Affected
- linux:linux_kernel
References
- https://git.kernel.org/stable/c/1f74d336990f37703a8eee77153463d65b67f70e
- https://git.kernel.org/stable/c/2323de34a3ae61a9f9b544c18583f71cea86721f
- https://git.kernel.org/stable/c/32bd8f1cbcf8b663e29dd1f908ba3a129541a11b
- https://git.kernel.org/stable/c/5013f8269887642cca784adc8db9b5f0b771533f
- https://git.kernel.org/stable/c/64933ab7b04881c6c18b21ff206c12278341c72e