Out-of-bounds read in Linux kernel - CVE-2026-52935
Published: June 25, 2026
Vulnerability identifier: #VU135446
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-52935
CWE-ID: CWE-125
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 disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in espintcp_sendmsg() when handling a new send while a previous partial send is still in progress. A local user can trigger a partial send and initiate another send to disclose sensitive information.
The issue occurs in the send path because a stale offset from a live partial-send state can remain attached to a new sk_msg.
How to mitigate CVE-2026-52935
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1777ceac4bea5e568a5ad44b7f9bb219c1db21b6
- https://git.kernel.org/stable/c/37487d55bf3300e3d2c1368da5c2bd3e3834ea4f
- https://git.kernel.org/stable/c/6564e9c7af7e1dc7bfe7f3093b728abe484d7630
- https://git.kernel.org/stable/c/8c6c691bf062dc0753a139a4ab8cb92a70fcf8f3
- https://git.kernel.org/stable/c/aa82a078f70f7ff88ba7d1017134e79d1ac140f2
- https://git.kernel.org/stable/c/ba21439302db9a82fe4edbed1e38a97271529421
- https://git.kernel.org/stable/c/c381039ade2e161ab08c0eda73c4f8b9a7115928
- https://git.kernel.org/stable/c/f9b38a8fbfa07f1deaf7ee1eb38fa8b21ea13990