PT-2025-53204 · Linux · Linux Kernel
Published
2023-07-18
·
Updated
2026-03-24
·
CVE-2023-54127
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw within the JFS filesystem implementation. Specifically, a double-free issue can occur in the
dbUnmount() function after a failed jfs remount() operation. This is due to the JFS SBI(ipbmap->i sb)->bmap not being set to NULL after being freed, leading to a double-free when jfs umount() or jfs remount() is subsequently called. Syzkaller, a fuzzing tool, identified this issue and can reproduce it using fault injection. The problem arises when either diMount() or dbMount() fails during jfs remount(), as diUnmount() or dbUnmount() may have already executed, resulting in a double-free on the next execution of jfs umount() or jfs remount().Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Double Free
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel