SB2026072164 - Improper control of a resource through its lifetime in Linux kernel vma include

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-53373)

CWE-ID: CWE-664 - Improper control of a resource through its 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 cause a denial of service.

The vulnerability exists due to improper resource management in mmap_action_complete() and VMA cleanup handling when processing mmap_prepare() actions invoked from mmap() compatibility paths. A local user can trigger an error during a crafted mmap operation to cause a denial of service.

The issue occurs when a not-fully-established detached VMA is handled through stacked drivers or file systems such as overlayfs or shm.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5394bcb746503f2ae4b206212416dccea78e3773
• https://git.kernel.org/stable/c/619eab23e1ce7c97e54bfc5a417306d94b3f6f13