macvlan: fix possible UAF in macvlan_forward_source()
In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u
CVE-2026-23001
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-2026-23001
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": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "8133e85b8a3ec9f10d861e0002ec6037256e987e",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "484919832e2db6ce1e8add92c469e5d459a516b5",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "232afc74a6dde0fe1830988e5827921f5ec9bb3f",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "15f6faf36e162532bec5cc05eb3fc622108bf2ed",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "8518712a2ca952d6da2238c6f0a16b4ae5ea3f13",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "6dbead9c7677186f22b7981dd085a0feec1f038e",
"versionType": "git"
},
{
"status": "affected",
"version": "79cf79abce71eb7dbc40e2f3121048ca5405cb47",
"lessThan": "7470a7a63dc162f07c26dbf960e41ee1e248d80e",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/macvlan.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.249",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.199",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.162",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.122",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.67",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.7",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/macvlan.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23001
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39726 · Revision 1
- Added to Heist Feed
- Publisher date