MGASA-2021-0398 - Updated kernel-linus packages fix security vulnerabilities

Publication date: 07 Aug 2021
URL: https://advisories.mageia.org/MGASA-2021-0398.html
Type: security
Affected Mageia releases: 8
CVE: CVE-2021-34556,
     CVE-2021-35477

This kernel-linus update is based on upstream 5.10.56 and fixes atleast
the following security issues:

In the Linux kernel through 5.13.7, an unprivileged BPF program can
obtain sensitive information from kernel memory via a Speculative Store
Bypass side-channel attack because the protection mechanism neglects the
possibility of uninitialized memory locations on the BPF stack
(CVE-2021-34556).

In the Linux kernel through 5.13.7, an unprivileged BPF program can
obtain sensitive information from kernel memory via a Speculative Store
Bypass side-channel attack because a certain preempting store operation
does not necessarily occur before a store operation that has an
attacker-controlled value (CVE-2021-35477).

For other upstream fixes, see the referenced changelogs.

References:
- https://bugs.mageia.org/show_bug.cgi?id=29313
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.53
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.54
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.55
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.56
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34556
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35477

SRPMS:
- 8/core/kernel-linus-5.10.56-1.mga8