title: Kernel: vmxnet3: null pointer dereference in vmxnet3_rq_cleanup()
description: A NULL pointer dereference flaw was found in vmxnet3_rq_cleanup in drivers/net/vmxnet3/vmxnet3_drv.c in the networking sub-component in vmxnet3 in the Linux Kernel. This issue may allow a local attacker with normal user privilege to cause a denial of service due to a missing sanity check during cleanup.
problem types: NULL Pointer Dereference
affected:
{
product: Kernel
vendor: n/a
versions:
version: 5.18, status: unaffected
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.rt7.201.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_tus:8.4::realtime, cpe:/a:redhat:rhel_tus:8.4::nfv]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Telecommunications Update Service
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-305.125.1.el8_4, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:rhel_e4s:8.4::baseos, cpe:/o:redhat:rhel_aus:8.4::baseos, cpe:/o:redhat:rhel_tus:8.4::baseos]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-372.87.1.el8_6, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:enterprise_linux:8::hypervisor, cpe:/o:redhat:rhel_eus:8.6::baseos, cpe:/a:redhat:rhel_eus:8.6::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:5.14.0-70.93.2.el9_0, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.0::appstream, cpe:/o:redhat:rhel_eus:9.0::baseos, cpe:/a:redhat:rhel_eus:9.0::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Extended Update Support
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
versions:
version: 0:5.14.0-70.93.1.rt21.165.el9_0, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/a:redhat:rhel_eus:9.0::nfv, cpe:/a:redhat:rhel_eus:9.0::realtime]
}
{
vendor: Red Hat
product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
versions:
version: 0:4.18.0-372.87.1.el8_6, lessThan: *, versionType: rpm, status: unaffected
cpe: [cpe:/o:redhat:enterprise_linux:8::hypervisor, cpe:/o:redhat:rhel_eus:8.6::baseos, cpe:/a:redhat:rhel_eus:8.6::crb]
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 6
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: unknown
cpes: cpe:/o:redhat:enterprise_linux:6
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 7
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: unknown
cpes: cpe:/o:redhat:enterprise_linux:7
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 7
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: unknown
cpes: cpe:/o:redhat:enterprise_linux:7
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 8
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
cpes: cpe:/o:redhat:enterprise_linux:8
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel
defaultStatus: affected
cpes: cpe:/o:redhat:enterprise_linux:9
}
{
vendor: Red Hat
product: Red Hat Enterprise Linux 9
collectionURL: https://access.redhat.com/downloads/content/package-browser/
packageName: kernel-rt
defaultStatus: affected
cpes: cpe:/o:redhat:enterprise_linux:9
}
{
product: Fedora
vendor: Fedora
collectionURL: https://packages.fedoraproject.org/
packageName: kernel
defaultStatus: unaffected
}
metrics:
other: [
content: {'value': 'Moderate', 'namespace': 'https://access.redhat.com/security/updates/classification/'}
type: Red Hat severity rating
]
workarounds: In order to mitigate this issue, prevent the affected code from being loaded by blacklisting the kernel module "vmxnet3". For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278
~~~
Exploiting this flaw will require CAP_NET_ADMIN access privilege in any user or network namespace.
~~~
