Advisories ยป MGASA-2021-0539

Updated kernel-linus packages fix security vulnerabilities

Publication date: 05 Dec 2021
Type: security
Affected Mageia releases : 8
CVE: CVE-2020-27820 , CVE-2021-4001 , CVE-2021-4002


This kernel-linus update is based on upstream 5.15.6 and fixes at least the
following security issues:

A vulnerability was found in Linux kernel, where a use-after-frees in
nouveau's postclose() handler could happen if removing device (that is
not common to remove video card physically without power-off, but same
happens if "unbind" the driver) (CVE-2020-27820).

A race condition when the eBPF map is frozen (CVE-2021-4001).

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

For other upstream fixes, see the referenced changelogs.