CVE-2026-31752

bridge: br_nd_send: validate ND option lengths

State: Published
Severity: Not scored
Published: May 1, 2026
Updated: Oct 15, 2026
Reserved: Mar 9, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

bridge: br_nd_send: validate ND option lengths

br_nd_send() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload.

Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ed842faeb2bd49256f00485402f3113205f91d30 to before 82a42eceec7c6bdb0e0da94c0542a173b7ea57f2Affected ed842faeb2bd49256f00485402f3113205f91d30 to before 259466f76f5a2148aff11134e68f4b4c6d52725bAffected ed842faeb2bd49256f00485402f3113205f91d30 to before ee02d8991fd7bd86ed6ebd0deb4aab53feb0e43aAffected ed842faeb2bd49256f00485402f3113205f91d30 to before e0bfd6d4dc77ab345b6c65eef0cfe9b2f69085aaAffected ed842faeb2bd49256f00485402f3113205f91d30 to before c49b9256bbacb6a135654aebd12e4c0e87166b7cAffected ed842faeb2bd49256f00485402f3113205f91d30 to before 837392a38445729c22e03d3abcf33f07763efd85Affected ed842faeb2bd49256f00485402f3113205f91d30 to before e71303a9190496136e240c4f2872b7b0b16027a7Affected ed842faeb2bd49256f00485402f3113205f91d30 to before 850837965af15707fd3142c1cf3c5bfaf022299bAffected
LinuxLinux	4.15Affected before 4.15Not affected 5.10.253 through 5.10.Not affected 5.15.203 through 5.15.Not affected 6.1.168 through 6.1.Not affected 6.6.134 through 6.6.Not affected 6.12.81 through 6.12.Not affected 6.18.22 through 6.18.Not affected 6.19.12 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

ed842faeb2bd49256f00485402f3113205f91d30 to before 82a42eceec7c6bdb0e0da94c0542a173b7ea57f2Affected
ed842faeb2bd49256f00485402f3113205f91d30 to before 259466f76f5a2148aff11134e68f4b4c6d52725bAffected
ed842faeb2bd49256f00485402f3113205f91d30 to before ee02d8991fd7bd86ed6ebd0deb4aab53feb0e43aAffected
ed842faeb2bd49256f00485402f3113205f91d30 to before e0bfd6d4dc77ab345b6c65eef0cfe9b2f69085aaAffected
ed842faeb2bd49256f00485402f3113205f91d30 to before c49b9256bbacb6a135654aebd12e4c0e87166b7cAffected
ed842faeb2bd49256f00485402f3113205f91d30 to before 837392a38445729c22e03d3abcf33f07763efd85Affected
ed842faeb2bd49256f00485402f3113205f91d30 to before e71303a9190496136e240c4f2872b7b0b16027a7Affected
ed842faeb2bd49256f00485402f3113205f91d30 to before 850837965af15707fd3142c1cf3c5bfaf022299bAffected

LinuxLinux

4.15Affected
before 4.15Not affected
5.10.253 through 5.10.*Not affected
5.15.203 through 5.15.*Not affected
6.1.168 through 6.1.*Not affected
6.6.134 through 6.6.*Not affected
6.12.81 through 6.12.*Not affected
6.18.22 through 6.18.*Not affected
6.19.12 through 6.19.*Not affected
7.0 and laterNot affected

References

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