Out-of-bounds read in Linux kernel - CVE-2026-46260
Published: June 4, 2026
Vulnerability identifier: #VU133330
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-2026-46260
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 cause a denial of service.
The vulnerability exists due to an out-of-bounds read in fib6_add_rt2node() when handling IPv6 route creation requests with RTA_NH_ID. A local user can send a specially crafted netlink message to cause a denial of service.
The issue occurs because a route created with RTA_NH_ID may lack the trailing struct fib6_nh, leading to an invalid read during route processing.
How to mitigate CVE-2026-46260
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/03b5051e02f5a3772eee57493ad697d4b505b0c2
- https://git.kernel.org/stable/c/500e54615c97bc3c427e52305a6fcd38a0e008a3
- https://git.kernel.org/stable/c/8244f959e2c125c849e569f5b23ed49804cce695
- https://git.kernel.org/stable/c/bcc60ad129ae1837cf809c81bff56ec8bfdb6b11
- https://git.kernel.org/stable/c/bf5009a06e03ee9a51052bb59f2228a5e4e66260