Out-of-bounds read in Linux kernel arm configs

1) Out-of-bounds read

EUVDB-ID: #VU90366

Risk: Low

CVSSv4.0: 4.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32078

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to read data or crash the application.

The vulnerability exists due to an out-of-bounds read error within the personal_server_map_irq() function in arch/arm/mach-footbridge/personal-pci.c, within the pci-$() function in arch/arm/mach-footbridge/Makefile. A local user can read data or crash the application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.12 rc1 - 5.12.11

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.12.11:*:*:*:*:*:*:*

External links

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=298a58e165e447ccfaae35fe9f651f9d7e15166f
https://github.com/torvalds/linux/commit/298a58e165e447ccfaae35fe9f651f9d7e15166f
https://kirtikumarar.com/CVE-2021-32078.txt
https://security.netapp.com/advisory/ntap-20210813-0002/

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.