SB20250502127 - Use-after-free in Linux kernel nilfs2
Published: May 2, 2025 Updated: May 10, 2025
Security Bulletin ID
SB20250502127
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-49834)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nilfs_remount() function in fs/nilfs2/super.c, within the nilfs_relax_pressure_in_lock(), nilfs_construct_segment(), nilfs_construct_dsync_segment() and nilfs_attach_log_writer() functions in fs/nilfs2/segment.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/39a3ed68270b079c6b874d4e4727a512b9b4882c
- https://git.kernel.org/stable/c/4feedde5486c07ea79787839153a71ca71329c7d
- https://git.kernel.org/stable/c/8cccf05fe857a18ee26e20d11a8455a73ffd4efd
- https://git.kernel.org/stable/c/9b162e81045266a2d5b44df9dffdf05c54de9cca
- https://git.kernel.org/stable/c/afbd1188382a75f6cfe22c0b68533f7f9664f182
- https://git.kernel.org/stable/c/b152300d5a1ba4258dacf9916bff20e6a8c7603b
- https://git.kernel.org/stable/c/b2fbf10040216ef5ee270773755fc2f5da65b749
- https://git.kernel.org/stable/c/b4736ab5542112fe0a40f140a0a0b072954f34da
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.267