#VU90366 Out-of-bounds read in Linux kernel - CVE-2021-32078

Vulnerability identifier: #VU90366

Vulnerability 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

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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

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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/

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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.