CVE-2026-31682

Vulnerability overview

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.

Affected product and versions

Product

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

Affected versions

>= ed842faeb2bd49256f00485402f3113205f91d30 < c68433fd291c9e88c00292095172c62d1997d662, >= ed842faeb2bd49256f00485402f3113205f91d30 < 4f397b950c916e9a1f8a4fce04ea0110206cad47, >= ed842faeb2bd49256f00485402f3113205f91d30 < bd91ec85aa4c77d645bd2739fc56784157a88ca2, >= ed842faeb2bd49256f00485402f3113205f91d30 < 658261898130da620fc3d0fbb0523efb3366cb55, >= ed842faeb2bd49256f00485402f3113205f91d30 < 2ba4caba423ed94d63006eb1d2227b0332ab7fcd, >= ed842faeb2bd49256f00485402f3113205f91d30 < 9c55e41c73af5c4511070933b1bd25248521270c, >= ed842faeb2bd49256f00485402f3113205f91d30 < 3a30f6469b058574f49efde61cd6f5d79e576053, >= ed842faeb2bd49256f00485402f3113205f91d30 < a01aee7cafc575bb82f5529e8734e7052f9b16ea, >= 4.15, >= V3.1.6, >= V3.1.5, >= 4.15 < 5.10.253, >= 5.11 < 5.15.203, >= 5.16 < 6.1.168, >= 6.2 < 6.6.134, >= 6.7 < 6.12.81, >= 6.13 < 6.18.22, >= 6.19 < 6.19.12, 7.0

Fixed versions

5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CWE

Not available