Out-of-bounds read in Linux kernel - CVE-2026-46119
Published: May 29, 2026
Vulnerability identifier: #VU133073
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-46119
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in libceph auth message processing when handling a crafted CEPH_MSG_AUTH_REPLY message. A remote attacker can send a specially crafted auth reply message to disclose sensitive information.
The issue occurs when a positive result value is misinterpreted as the size of the front segment to send, which can cause memory beyond the allocated buffer to be transmitted.
How to mitigate CVE-2026-46119
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/1c439de70b1c3eb3c6bffa8245c16b9fc318f114
- https://git.kernel.org/stable/c/2ae0afd98432536562fa8261538ae795446f0589
- https://git.kernel.org/stable/c/408e85ee708b6aa03eeb0220ffa0915f4d407181
- https://git.kernel.org/stable/c/8517b6c8d2c759918ba0058cb6c7e14d59643202
- https://git.kernel.org/stable/c/b7df9fbd4869fdfe09a3f501ffd228486521e062