#VU124522 Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-23326
Published: March 25, 2026
Vulnerability identifier: #VU124522
Vulnerability risk: Low
CVSSv4.0: 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
CVE-ID: CVE-2026-23326
CWE-ID: CWE-772
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper list management in the XSK (AF_XDP) subsystem when handling buffer fragments. A local user can trigger improper deletion of fragment nodes, leading to a buffer leak that results in resource exhaustion over time.
The issue arises because list_node is reused for both the xskb pool list and the buffer free list, and list_del() does not reinitialize node pointers, causing xp_free() to incorrectly skip returning buffers to the free list.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/2a9ea988465ece5b6896b1bdc144170a64e84c35
- https://git.kernel.org/stable/c/5172adf9efb8298a52f4dcdc3f98d4d9d1e06a6d
- https://git.kernel.org/stable/c/60abb0ac11dccd6b98fd9182bc5f85b621688861
- https://git.kernel.org/stable/c/645c6d8376ad4913cbffe0e0c2cca0c4febbe596
- https://git.kernel.org/stable/c/b38cbd4af5034635cff109e08788c63f956f3a69