Out-of-bounds read in Linux kernel - CVE-2026-31682
Published: April 25, 2026
Vulnerability identifier: #VU127875
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-31682
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 cause a denial of service.
The vulnerability exists due to an out-of-bounds read in br_nd_send when parsing neighbor discovery options from a non-linear skb. A remote attacker can send a specially crafted ICMPv6 neighbor solicitation request to cause a denial of service.
How to mitigate CVE-2026-31682
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2ba4caba423ed94d63006eb1d2227b0332ab7fcd
- https://git.kernel.org/stable/c/3a30f6469b058574f49efde61cd6f5d79e576053
- https://git.kernel.org/stable/c/4f397b950c916e9a1f8a4fce04ea0110206cad47
- https://git.kernel.org/stable/c/658261898130da620fc3d0fbb0523efb3366cb55
- https://git.kernel.org/stable/c/9c55e41c73af5c4511070933b1bd25248521270c
- https://git.kernel.org/stable/c/a01aee7cafc575bb82f5529e8734e7052f9b16ea
- https://git.kernel.org/stable/c/bd91ec85aa4c77d645bd2739fc56784157a88ca2
- https://git.kernel.org/stable/c/c68433fd291c9e88c00292095172c62d1997d662