MGASA-2022-0195 - Updated kernel-linus packages fix security vulnerabilities

Publication date: 21 May 2022
URL: https://advisories.mageia.org/MGASA-2022-0195.html
Type: security
Affected Mageia releases: 8
CVE: CVE-2022-0500,
     CVE-2022-1012,
     CVE-2022-1734,
     CVE-2022-23222,
     CVE-2022-28893,
     CVE-2022-29581

This kernel-linus update is based on upstream 5.15.41 and fixes at least the
following security issues:

A flaw was found in unrestricted eBPF usage by the BPF_BTF_LOAD, leading
to a possible out-of-bounds memory write in the Linux kernel BPF subsystem
due to the way a user loads BTF. This flaw allows a local user to crash or
escalate their privileges on the system. NOTE: Mageia kernels by default
prevents unprivileged users from being able to use eBPF so this would
require a privileged user with CAP_SYS_ADMIN or root to be able to abuse
this flaw reducing its attack space (CVE-2022-0500).

Due to the small table perturb size, a memory leak flaw was found in the
Linux kernel’s TCP source port generation algorithm in the net/ipv4/tcp.c
function. This flaw allows an attacker to leak information and may cause
a denial of service (CVE-2022-1012).

A flaw was found in the Linux kernel’s nfcmrvl_nci_unregister_dev()
function. A race condition leads to a use-after-free issue when simulating
the NFC device from the user space (CVE-2022-1734).

A flaw was found in the Linux kernel's adjust_ptr_min_max_vals in the
kernel/bpf/verifier.c function. In this flaw, a missing sanity check for
*_OR_NULL pointer types that perform pointer arithmetic may cause a kernel
information leak issue. NOTE: Mageia kernels by default prevents
unprivileged users from being able to use eBPF so this would require a
privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw
reducing its attack space (CVE-2022-23222).

The SUNRPC subsystem in the Linux kernel through 5.17.2 can call
xs_xprt_free before ensuring that sockets are in the intended state
(CVE-2022-28893).

Improper Update of Reference Count vulnerability in net/sched of Linux
Kernel allows local attacker to cause privilege escalation to root
(CVE-2022-29581).

For other upstream fixes, see the referenced changelogs.

References:
- https://bugs.mageia.org/show_bug.cgi?id=30436
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.36
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.37
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.38
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.39
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.40
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.41
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-0500
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1012
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1734
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23222
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28893
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-29581

SRPMS:
- 8/core/kernel-linus-5.15.41-1.mga8