vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]
In the Linux kernel, the following vulnerability has been resolved: vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't. Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning. This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.
CVE-2025-21666
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-2025-21666
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": "daeac89cdb03d30028186f5ff7dc26ec8fa843e7",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "b52e50dd4fabd12944172bd486a4f4853b7f74dd",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "bc9c49341f9728c31fe248c5fbba32d2e81a092b",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "c23d1d4f8efefb72258e9cedce29de10d057f8ca",
"versionType": "git"
},
{
"status": "affected",
"version": "c0cfa2d8a788fcf45df5bf4070ab2474c88d543a",
"lessThan": "91751e248256efc111e52e15115840c35d85abaf",
"versionType": "git"
}
],
"programFiles": [
"net/vmw_vsock/af_vsock.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/af_vsock.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21666
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26900 · Revision 1
- Added to Heist Feed
- Publisher date