vxlan: use pskb_network_may_pull() in route_shortcircuit()
In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr)) (or ipv6hdr), which checks if bytes are available starting from skb->data. However, in vxlan_xmit(), skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20) only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of IP header), leaving the rest of the IP header potentially un-pulled in non-linear frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled linear buffer length. Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to the length check to ensure the full network header is present in the linear buffer.
CVE-2026-74473
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-2026-74473
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": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "c419af4924c1593500a40519730ed98575d04a3e",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "6bd0a3a1b5744166946f0c551a6665c3b46b05e4",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "214ba43faf106cb06cd3dd30999c5c809c868b53",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "42887be7c4cf283cce02cd0fb6411221167c8b6c",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "aa0d31376d574ac858a40078431a77127bf04ee4",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "ee799977d7941dbfb11049e17edd9eaf4f8820f7",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "4f3f96e771a20263635bb5e1307c112d613b4bbd",
"versionType": "git"
},
{
"status": "affected",
"version": "e4f67addf158f98f8197e08974966b18480dc751",
"lessThan": "26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/vxlan/vxlan_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/vxlan/vxlan_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74473
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #33167 · Revision 1
- Added to Heist Feed
- Publisher date