Improper control of a resource through its lifetime in Linux kernel - CVE-2026-52994
Published: June 25, 2026
Vulnerability identifier: #VU135373
CSH Severity: Low
CVSS v4.0: 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-2026-52994
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to bypass resource limit enforcement.
The vulnerability exists due to improper resource management in virtio_transport_init_zcopy_skb() when processing MSG_ZEROCOPY sends. A local user can send data using MSG_ZEROCOPY to bypass resource limit enforcement.
The issue occurs because pinned-pages accounting can use a consumed iterator count of 0 on the last skb, causing RLIMIT_MEMLOCK accounting to be skipped.
How to mitigate CVE-2026-52994
Install security update from vendor's repository.