vsock/virtio: Validate length in packet header before skb_put()
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: Validate length in packet header before skb_put() When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unfortunately, virtio_vsock_skb_rx_put() uses the length from the packet header as the length argument to skb_put(), potentially resulting in SKB overflow if the host has gone wonky. Validate the length as advertised by the packet header before calling virtio_vsock_skb_rx_put().
CVE-2025-39718
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-2025-39718
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": "baddcc2c71572968cdaeee1c4ab3dc0ad90fa765",
"lessThan": "969b06bd8b7560efb100a34227619e7d318fbe05",
"versionType": "git"
},
{
"status": "affected",
"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20",
"lessThan": "ee438c492b2e0705d819ac0e25d04fae758d8f8f",
"versionType": "git"
},
{
"status": "affected",
"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20",
"lessThan": "faf332a10372390ce65d0b803888f4b25a388335",
"versionType": "git"
},
{
"status": "affected",
"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20",
"lessThan": "676f03760ca1d69c2470cef36c44dc152494b47c",
"versionType": "git"
},
{
"status": "affected",
"version": "71dc9ec9ac7d3eee785cdc986c3daeb821381e20",
"lessThan": "0dab92484474587b82e8e0455839eaf5ac7bf894",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.63",
"lessThan": "6.1.149",
"versionType": "semver"
}
],
"programFiles": [
"net/vmw_vsock/virtio_transport.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.149",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.103",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.44",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.16.4",
"versionType": "semver",
"lessThanOrEqual": "6.16.*"
},
{
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/vmw_vsock/virtio_transport.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-39718
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30623 · Revision 1
- Added to Heist Feed
- Publisher date