CVE-2026-31682
Linux Kernel vulnerability
- Published25 Apr 2026
Description
In the Linux kernel, the following vulnerability has been resolved: bridge: br_nd_send: linearize skb before parsing ND options br_nd_send() parses neighbour discovery options from ns->opt[] and assumes that these options are in the linear part of request. Its callers only guarantee that the ICMPv6 header and target address are available, so the option area can still be non-linear. Parsing ns->opt[] in that case can access data past the linear buffer. Linearize request before option parsing and derive ns from the linear network header.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HAffected products
Remediation
- 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
References
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- 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
Frequently asked
Is CVE-2026-31682 being actively exploited?
CVE-2026-31682 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.84%.
How severe is CVE-2026-31682?
CVE-2026-31682 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.84% probability of exploitation.
Which products are affected by CVE-2026-31682?
Affected products include Linux Kernel.
How do I fix CVE-2026-31682?
Upgrade affected software to a fixed version, for example Linux Kernel 5.10.253 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-31682 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.