vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive().
In the Linux kernel, the following vulnerability has been resolved: vxlan: Fix potential null-ptr-deref in vxlan_gro_prepare_receive(). udp_tunnel_sock_release() could set sk->sk_user_data to NULL while vxlan_gro_prepare_receive() is running. Let's check if rcu_dereference_sk_user_data() is NULL after skb_gro_remcsum_init().
CVE-2026-74406
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-2026-74406
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": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "9c58c729d32e7cea5772cc44929c6cd61e5a31cd",
"versionType": "git"
},
{
"status": "affected",
"version": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "f79c80f173fda9545b220c1f094b65fc06c252d0",
"versionType": "git"
},
{
"status": "affected",
"version": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "08f40c0d23c67c3aa4224c3311e134999c721fb4",
"versionType": "git"
},
{
"status": "affected",
"version": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "4a8cde6f7281ea2c4c290f9ad9923b3631defceb",
"versionType": "git"
},
{
"status": "affected",
"version": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "ef44dac2a37f86eeae6b88ed10a6d60b35387dfd",
"versionType": "git"
},
{
"status": "affected",
"version": "5602c48cf87562c2f95b831d690631935e834295",
"lessThan": "30a45c0bffdd62350261e2f2689fdba426a33578",
"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": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"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-2026-74406
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #33141 · Revision 1
- Added to Heist Feed
- Publisher date