Memory corruption in Linux kernel - CVE-2026-64026
Published: July 20, 2026
Vulnerability identifier: #VU138622
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-64026
CWE-ID: CWE-119
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 pagecache corruption.
The vulnerability exists due to memory corruption in the Linux kernel RxRPC recvmsg handling when decrypting locally transmitted DATA packets processed through splice(). A local user can trigger crafted local packet handling to cause pagecache corruption.
The issue affects in-place decryption of shared packet data, and MSG_PEEK may influence which packet is decrypted and require re-decryption during subsequent recvmsg() processing.
How to mitigate CVE-2026-64026
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/46cb765e2e5ad52303ea157e10d370bb6b7acbbf
- https://git.kernel.org/stable/c/a05bf6d9e621fa71e89ccebe3047ba45218d7b38
- https://git.kernel.org/stable/c/b94a6ccbaf1104dd980150a65fdeb2f69d17d2f5
- https://git.kernel.org/stable/c/c580087743712112778a06d65a4074053072d7bf
- https://git.kernel.org/stable/c/d2bc90cf6c75cb96d2ce549be6c35efa3099d25b