Integer overflow in Linux kernel

1) Integer overflow

EUVDB-ID: #VU86575

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-33631

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow when mounting a malicious filesystem. A local user can mount a specially crafted filesystem, trigger an integer overflow and execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

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

External links

https://gitee.com/src-openeuler/kernel/pulls/1389
https://gitee.com/src-openeuler/kernel/pulls/1396
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5c099c4fdc438014d5893629e70a8ba934433ee8
https://www.openwall.com/lists/oss-security/2024/01/30/3
https://www.openwall.com/lists/oss-security/2024/01/30/4
https://www.openwall.com/lists/oss-security/2024/01/30/5
https://www.openwall.com/lists/oss-security/2024/01/30/9
https://www.openwall.com/lists/oss-security/2024/01/30/10
https://www.openwall.com/lists/oss-security/2024/01/31/3
https://www.openwall.com/lists/oss-security/2024/01/31/2
https://www.openwall.com/lists/oss-security/2024/02/02/6
https://www.openwall.com/lists/oss-security/2024/02/02/9
https://www.openwall.com/lists/oss-security/2024/02/03/1

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.