Improper control of a resource through its lifetime in Linux kernel - CVE-2026-43502
Published: May 22, 2026
Vulnerability identifier: #VU132124
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-43502
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 cause a denial of service.
The vulnerability exists due to improper resource management in rds_message_purge() in the net/rds subsystem when cleaning up a failed zerocopy send before the message is queued. A local user can trigger an early zerocopy send failure to cause a denial of service.
The issue occurs after user pages have been pinned but before the message is attached to the sending socket.
How to mitigate CVE-2026-43502
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0f5c185fc79a59ee9991234dd6d2a3e5afa6e75b
- https://git.kernel.org/stable/c/14ef6fd18db2494098b21e0471bf27a1d8e9993e
- https://git.kernel.org/stable/c/21d70744e6d3bbf9293aa1ee6fba7c53ad75275e
- https://git.kernel.org/stable/c/3abc8983b2bae3f487f77d9da5527d7d6b210d46
- https://git.kernel.org/stable/c/44b550d88b267320459d518c0743a241ab2108fa