NULL Pointer Dereference Affecting kernel-uek-core package, versions <0:5.15.0-0.30.19.el8uek
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Test your applications- Snyk ID SNYK-ORACLE8-KERNELUEKCORE-2939579
- published 2 Jul 2022
- disclosed 10 Mar 2022
Introduced: 10 Mar 2022
CVE-2021-4095 Open this link in a new tabHow to fix?
Upgrade Oracle:8 kernel-uek-core to version 0:5.15.0-0.30.19.el8uek or higher.
This issue was patched in ELSA-2022-9533.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uek-core package and not the kernel-uek-core package as distributed by Oracle.
See How to fix? for Oracle:8 relevant fixed versions and status.
A NULL pointer dereference was found in the Linux kernel's KVM when dirty ring logging is enabled without an active vCPU context. An unprivileged local attacker on the host may use this flaw to cause a kernel oops condition and thus a denial of service by issuing a KVM_XEN_HVM_SET_ATTR ioctl. This flaw affects Linux kernel versions prior to 5.17-rc1.
References
- https://linux.oracle.com/cve/CVE-2021-4095.html
- https://linux.oracle.com/errata/ELSA-2022-9534.html
- https://bugzilla.redhat.com/show_bug.cgi?id=2031194
- http://www.openwall.com/lists/oss-security/2022/01/17/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VT6573CGKVK3DU2632VVO5BVM4IU7SBV/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QIOQN7JJNN6ABIDGRSTVZA65MHRLMH2Q/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QIOQN7JJNN6ABIDGRSTVZA65MHRLMH2Q/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT6573CGKVK3DU2632VVO5BVM4IU7SBV/