vsock/virtio: discard packets if the transport changes
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
CVE-2025-21669
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-2025-21669
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": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "18a7fc371d1dbf8deff16c2dd9292bcc73f43040",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "6486915fa661584d70e8e7e4068c6c075c67dd6d",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "d88b249e14bd0ee1e46bbe4f456e22e01b8c68de",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "677579b641af109613564460a4e3bdcb16850b61",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1",
"versionType": "git"
}
],
"programFiles": [
"net/vmw_vsock/virtio_transport_common.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.234",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.177",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.127",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.74",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.11",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/vmw_vsock/virtio_transport_common.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21669
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26902 · Revision 1
- Added to Heist Feed
- Publisher date