SB20260816314 - Memory leak in Linux kernel lockd
Published: August 16, 2026
Security Bulletin ID
SB20260816314
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2026-72219)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a memory leak in nlm_lookup_file() when processing file handles rejected by the underlying export. A remote attacker can present crafted file handles that trigger nlm_do_fopen() failures to cause a denial of service.
Each failed open attempt leaks one newly allocated nlm_file object.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1161c4b5bd0048c8148e919f818a33cff3623ef0
- https://git.kernel.org/stable/c/1403f1221a35a6caf959bb7bf005741f17263c66
- https://git.kernel.org/stable/c/39f59bf67231ed2eb0cdf6337194360e964b609a
- https://git.kernel.org/stable/c/3f2dc01b9cb516d4727a3b9263ee58c71ca00ba9
- https://git.kernel.org/stable/c/bca74fff138429f3d5802865f38fc883d53a4f1a
- https://git.kernel.org/stable/c/d7c677feb3aa1f42b1026d75a8ea61338b51e4fb
- https://git.kernel.org/stable/c/ddfbd816273b4e9c9b836f5b8773664c6f40f807
- https://git.kernel.org/stable/c/f16a1513452edb532fec81e591c64c320866719c