Improper validation of integrity check value in Linux kernel

1) Improper validation of integrity check value

EUVDB-ID: #VU92749

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-2021-4148

CWE-ID: CWE-354 - Improper Validation of Integrity Check Value

Exploit availability: No

Description

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

A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

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

External links

https://lkml.org/lkml/2021/9/12/323
https://bugzilla.redhat.com/show_bug.cgi?id=2026487
https://lkml.org/lkml/2021/9/17/1037

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.