MGASA-2023-0007

This kernel update is based on upstream 5.15.88 and fixes atleast the following security issues:

A use-after-free flaw was found in the Linux kernel’s SGI GRU driver in the way the first grufileunlockedioctl function is called by the user, where a fail pass occurs in the grucheckchipletassignment function. This flaw allows a local user to crash or potentially escalate their privileges on the system (CVE-2022-3424).

A vulnerability in the function btfdumpnamedups of the file tools/lib/bpf/ btfdump.c of the component libbpf. This flaw allows a manipulation that may lea to a use-after-free issue (CVE-2022-3534).

A vulnerability was found in areacacheget in drivers/net/ethernet/ netronome/nfp/nfpcore/nfp_cppcore.c in the Netronome Flow Processor (NFP) driver in the Linux kernel. This flaw allows a manipulation that may lead to a use-after-free issue (CVE-2022-3545).

An out-of-bounds memory write vulnerability was found in the Linux kernel vmwgfx driver in vmwkmscursor_snoop due to a missing check of a memcpy length. This flaw allows a local, unprivileged attacker with access to either the /dev/dri/card0 or /dev/dri/rendererD128 and able to issue an ioctl() on the resulting file descriptor, to crash the system, causing a denial of service (CVE-2022-36280).

A use-after-free flaw was found in the Linux kernel’s dvb-core subsystem (DVB API used by Digital TV devices) in how a user physically removed a USB device (such as a DVB demultiplexer device) while running malicious code. This flaw allows a local user to crash or potentially escalate their privileges on the system (CVE-2022-41218).

An issue was discovered in the Linux kernel through 6.0.10. l2capconfigreq in net/bluetooth/l2capcore.c has an integer wraparound via L2CAPCONF_REQ packets (CVE-2022-45934).

In the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a denial of service (system crash) via a crafted traffic control configuration that is set up with "tc qdisc" and "tc class" commands. This affects qdiscgraft in net/sched/schapi.c (CVE-2022-47929).

A buffer overflow vulnerability was found in the Netfilter subsystem in the Linux Kernel. This issue could allow the leakage of both stack and heap addresses, and potentially allow Local Privilege Escalation to the root user via arbitrary code execution (CVE-2023-0179).

A vulnerability in the kernel ksmbd allows a remote attacker to perform a denial of service (DoS) attack. The vulnerability exists due to a boundary error within the ksmbddecodentlmsspauthblob() function in ksmbd when handling NTLMv2 authentication. A remote attacker can send specially crafted data to ksmbd, trigger a heap-based buffer overflow and perform a denial of service (DoS) attack (CVE-2023-0210).

ALSA: pcm: Move rwsem lock inside sndctlelem_read to prevent UAF (CVE-2023-0266).

cbqclassify in net/sched/schcbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TCACTSHOT condition rather than valid classification results) (CVE-2023-23454).

atmtcenqueue in net/sched/schatm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TCACT_SHOT condition rather than valid classification results) (CVE-2023-23455).

Other fixes in this update: - fixes broken sound on Intel Tiger Lake systems (regression in kernel 5.15.82 released in MGASA-2022-0477 (mga #31319). - xtables-addons have been updated to 3.23.

For other upstream fixes in this update, see the referenced changelogs.