vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets
In the Linux kernel, the following vulnerability has been resolved: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets vmxnet3_get_hdr_len() assumes gdesc->rcd.v4/v6/tcp always describe the outer header, but for a Geneve-encapsulated packet the device can set them based on the inner header instead, signalled by the VMXNET3_RCD_HDR_INNER_SHIFT bit in the completion descriptor. Since the function never skips the outer encapsulation, this mismatch triggers: - BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP), because the outer protocol is UDP (Geneve), not TCP. - BUG_ON(hdr.eth->h_proto != ...), when the tunnel's outer and inner IP versions differ (e.g. outer IPv6/inner IPv4 or vice versa). Check VMXNET3_RCD_HDR_INNER_SHIFT up front and bail out, since the function cannot locate the inner header it would need to parse. Also convert the remaining BUG_ON()s in this function to return 0 defensively.
CVE-2026-68299
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-2026-68299
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": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "2ddf51fcb6dd7d55ceef38e2e1a5ab2ab7fd47b0",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "fbab6b73cc086e32698c86e43d1b16bf17d24c36",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "28e382646417c7e2be9c9a7079eddf627ff52b90",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "667b6e52048eaf4dbcf1707ed87ffd44abb9cb38",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "28cb5d8d13b4c1faf3f688f62e5df82fe7b438d8",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "4fdb0f162ccdbe9626863b10003855703253fa29",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "b28596baf87e25a078789f1c05817c8a3bf71257",
"versionType": "git"
},
{
"status": "affected",
"version": "45dac1d6ea045ae56e4df8d9c70c92c7412bd4fc",
"lessThan": "34a71f5361fc3adb5b7138da78750b0d535a8252",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/vmxnet3/vmxnet3_drv.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.2",
"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": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/vmxnet3/vmxnet3_drv.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68299
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41691 · Revision 1
- Added to Heist Feed
- Publisher date