Buffer overflow in Linux kernel base regmap driver

1) Buffer overflow

EUVDB-ID: #VU93250

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-2022-48696

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to memory corruption within the regmap_get_spi_bus() function in drivers/base/regmap/regmap-spi.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.19 - 6.0 rc4

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.19:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19:rc6:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.19.5:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/15ff1f17847c19174b260bd7dd0de33edcebd45e
https://git.kernel.org/stable/c/f5723cfc01932c7a8d5c78dbf7e067e537c91439
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.9
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0

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.