CVE-2023-52804 | Date: (C)2024-05-22 (M)2024-06-07 |
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.
CVSS Score and Metrics +CVSS Score and Metrics -CVSS V3 Severity: | CVSS V2 Severity: |
CVSS Score : 8.4 | CVSS Score : |
Exploit Score: | Exploit Score: |
Impact Score: | Impact Score: |
|
CVSS V3 Metrics: | CVSS V2 Metrics: |
Attack Vector: | Access Vector: |
Attack Complexity: | Access Complexity: |
Privileges Required: | Authentication: |
User Interaction: | Confidentiality: |
Scope: | Integrity: |
Confidentiality: | Availability: |
Integrity: | |
Availability: | |
| |