SB20260528125 - Memory leak in Linux kernel ext4
Published: May 28, 2026
Security Bulletin ID
SB20260528125
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-45948)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in ext4_ext_shift_extents() when shifting extents. A local user can trigger the vulnerable code path to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/12615ab4bfb69678e5d961b28bb70040299e51b1
- https://git.kernel.org/stable/c/1bce219ee5512cf179ba40cf114945a14a16e21f
- https://git.kernel.org/stable/c/2f4b1052246ca646bb17bfe0f53df2fdf9729b58
- https://git.kernel.org/stable/c/4a79fde8db7eba7f1128d971ceba4e3c9ac84aec
- https://git.kernel.org/stable/c/7e807cb8603b7664fa630a696cd891d9a03c248d
- https://git.kernel.org/stable/c/afc5e61e1a07b2b833bd72cbee36ecce9cd901e2
- https://git.kernel.org/stable/c/bd7b52557e4a3ccd7595fdb3a585f1257de57935
- https://git.kernel.org/stable/c/ca81109d4a8f192dc1cbad4a1ee25246363c2833