NULL pointer dereference in Linux kernel events amd

1) NULL pointer dereference

EUVDB-ID: #VU108278

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49781

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the amd_pmu_handle_irq() function in arch/x86/events/amd/core.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.0 - 6.0.9

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.5:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/baa014b9543c8e5e94f5d15b66abfe60750b8284
https://git.kernel.org/stable/c/fd5e454b856ed86b090336e269695d9908609b71
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.10

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.