SB2026102376 - Memory leak in Linux kernel fs
Published: October 23, 2026
Security Bulletin ID
SB2026102376
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-99080)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to exhaust kernel memory and potentially cause a denial of service.
The vulnerability exists due to a memory leak involving xarray nodes in filesystem inode cleanup when handling madvise operations. A local user can invoke madvise to trigger xarray node leaks, potentially exhausting kernel memory and causing a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/21f51434c47d8628b62275ae6c6ad6b573abcd02
- https://git.kernel.org/stable/c/43f830e2bb84b22ca824b20bb861d823ecb520bd
- https://git.kernel.org/stable/c/50cff3f112d64db6e5f57355f79bc837db8fe132
- https://git.kernel.org/stable/c/ee3f011250104129893d8e9599147e457d4d7280
- https://git.kernel.org/stable/c/f1c966eb6ed5e190c90a56c5bdaa69967de39f21