bridge: br_nd_send: linearize skb before parsing ND options
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.
CVE-2026-31682
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-2026-31682
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": "c68433fd291c9e88c00292095172c62d1997d662",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "4f397b950c916e9a1f8a4fce04ea0110206cad47",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "bd91ec85aa4c77d645bd2739fc56784157a88ca2",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "658261898130da620fc3d0fbb0523efb3366cb55",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "2ba4caba423ed94d63006eb1d2227b0332ab7fcd",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "9c55e41c73af5c4511070933b1bd25248521270c",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "3a30f6469b058574f49efde61cd6f5d79e576053",
"versionType": "git"
},
{
"status": "affected",
"version": "ed842faeb2bd49256f00485402f3113205f91d30",
"lessThan": "a01aee7cafc575bb82f5529e8734e7052f9b16ea",
"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-2026-31682
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #39957 · Revision 1
- Added to Heist Feed
- Publisher date