net: qrtr: restrict socket creation to the initial network namespace
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: restrict socket creation to the initial network namespace QRTR keeps its entire port and node state in module-global variables that are not partitioned per network namespace: qrtr_local_nid is a single global node id (always 1) and qrtr_ports is a single global xarray. qrtr_port_lookup() and qrtr_local_enqueue() operate on that global state with no network-namespace check, and qrtr_create() places no restriction on the namespace a socket is created in. As a result an unprivileged process that creates an AF_QIPCRTR socket in a separate network namespace, e.g. via unshare(CLONE_NEWUSER | CLONE_NEWNET), can send QRTR datagrams - including control-plane messages such as QRTR_TYPE_NEW_SERVER - to QRTR sockets owned by another namespace, and vice versa. The receiving socket sees such a message as coming from node id 1, indistinguishable from a legitimate local client, breaking the isolation that network namespaces are expected to provide. QRTR is a transport to global hardware endpoints (the modem and other remote processors) and has no per-namespace semantics; its in-kernel name service already creates its socket in init_net only. Confine the socket family to the initial network namespace, as other non-namespace-aware socket families do (see llc_ui_create() and the ieee802154 socket code).
CVE-2026-68294
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-2026-68294
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": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "7814f6a3415cad38aa8d6dfc573df778260d66aa",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "2d22b94a154ccb9755dddfff802fe3e2b1adbab5",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "8d351fe0654a20c9f95a61b05d24ebe6d4be3fbb",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "4b95e1f0d6e6342c427cb341ee18a894b146b789",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "f488116df769bdaf89c93371350e49e12133e70f",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "8150c48fb978e01689f94ed80148f8a7499ae571",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "659b9b4f194bb56b9903cc95e786ef1d438baa7d",
"versionType": "git"
},
{
"status": "affected",
"version": "bdabad3e363d825ddf9679dd431cca0b2c30f881",
"lessThan": "3b536db8fb32da9e9c62f2bb45e2e319331f0426",
"versionType": "git"
}
],
"programFiles": [
"net/qrtr/af_qrtr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.7",
"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": [
"net/qrtr/af_qrtr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68294
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41688 · Revision 1
- Added to Heist Feed
- Publisher date