vxlan: re-fetch eth header after route_shortcircuit()
In the Linux kernel, the following vulnerability has been resolved: vxlan: re-fetch eth header after route_shortcircuit() Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb). Inside route_shortcircuit(), pskb_may_pull() can be called, which may reallocate skb->head. In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to freed memory, leading to a use-after-free when dereferencing eth->h_dest. Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().
CVE-2026-80681
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-2026-80681
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": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "6375093eb45cd7d89f1945f939eeae3b29d79f56",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "1b7f7b653e3557690047c62f03b80a24ea5a58a5",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "bf045341dfb3e767f0ff94cf240ce3c371973bd4",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "2355c8c26d2aa1b4385b369e67202e47d460d555",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "1235e017aa11cf01e91b613c4c5ed6aa28934fff",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "c9dceac9e1c7c772c43c732fc0d325e72835801a",
"versionType": "git"
},
{
"status": "affected",
"version": "ae8840825605f36f98f247323edc150e761cb64e",
"lessThan": "1395a676ec15a0a02a2a6d86602324f2d5fd41d5",
"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": "3.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.10",
"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-2026-80681
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #34355 · Revision 1
- Added to Heist Feed
- Publisher date