bridge: br_nd_send: validate ND option lengths
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.
CVE-2026-31752
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-31752
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "82a42eceec7c6bdb0e0da94c0542a173b7ea57f2",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "259466f76f5a2148aff11134e68f4b4c6d52725b",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "ee02d8991fd7bd86ed6ebd0deb4aab53feb0e43a",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "e0bfd6d4dc77ab345b6c65eef0cfe9b2f69085aa",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "c49b9256bbacb6a135654aebd12e4c0e87166b7c",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "837392a38445729c22e03d3abcf33f07763efd85",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "e71303a9190496136e240c4f2872b7b0b16027a7",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "850837965af15707fd3142c1cf3c5bfaf022299b",
"versionType": "git"
}
],
"programFiles": [
"net/bridge/br_arp_nd_proxy.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.168",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.134",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.81",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.22",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.12",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bridge/br_arp_nd_proxy.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31752
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28320 · Revision 1
- Added to Heist Feed
- Publisher date