vsock: fix buffer size clamping order
In the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint. This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size. Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.
CVE-2026-46234
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-2026-46234
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": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "caf11dfea5233a69298a1c448bbf8d1639c80536",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "01ef69785dc3162f588a361ab770b1e312800188",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "a998a7e250bf976539e05a00ec64a81292afecaa",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "310da27932dd0afe7ce7456dfe1f0814c3301f41",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "2602f7bb5818e92315feeaeb71d8ce4d5c9ab160",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "0b68881501460c3761f196469e1e503218c5e536",
"versionType": "git"
},
{
"status": "affected",
"version": "b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97",
"lessThan": "d114bfdc9b76bf93b881e195b7ec957c14227bab",
"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": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.140",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.90",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.32",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.9",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/vmw_vsock/af_vsock.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46234
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28412 · Revision 1
- Added to Heist Feed
- Publisher date