Memory Leak Affecting kernel-tools package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-ROCKY8-KERNELTOOLS-3193176
- published 5 Jan 2023
- disclosed 3 Mar 2022
Introduced: 3 Mar 2022
CVE-2021-4002 Open this link in a new tabHow to fix?
Upgrade Rocky-Linux:8 kernel-tools to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RLSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Rocky-Linux.
See How to fix? for Rocky-Linux:8 relevant fixed versions and status.
A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4002
- https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4002.json
- https://bugzilla.redhat.com/show_bug.cgi?id=2025726
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890
- https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
- https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
- https://www.debian.org/security/2022/dsa-5096
- https://www.openwall.com/lists/oss-security/2021/11/25/1
- https://www.oracle.com/security-alerts/cpujul2022.html