CVE-2021-4002

Description

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://www.oracle.com/security-alerts/cpujul2022.html

https://www.openwall.com/lists/oss-security/2021/11/25/1

https://www.debian.org/security/2022/dsa-5096

https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html

https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4a118f2eead1d6c49e00765de89878288d4b890

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=13e4ad2ce8df6e058ef482a31fdd81c725b0f7ea

https://bugzilla.redhat.com/show_bug.cgi?id=2025726

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3