#VU104739 Double free in Linux kernel - CVE-2022-49675

Vulnerability identifier: #VU104739

Vulnerability 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-2022-49675

CWE-ID: CWE-415

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a double free error within the tick_nohz_full_setup() function in kernel/time/tick-sched.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/2390095113e98fc52fffe35c5206d30d9efe3f78
https://git.kernel.org/stable/c/c4ff3ffe0138234774602152fe67e3a898c615c6
https://git.kernel.org/stable/c/ea32b27e2f8c58c92bff5ecba7fcf64b97707089
https://git.kernel.org/stable/c/f4a80ec8c51d68be4b7a7830c510f75080c5e417

---

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.