Double free in Linux kernel clocksource driver



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-49726
CWE-ID CWE-415
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double free

EUVDB-ID: #VU104740

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-2022-49726

CWE-ID: CWE-415 - Double Free

Exploit availability: No

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 hv_init_clocksource() function in drivers/clocksource/hyperv_timer.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 5.10.123

CPE2.3 External links

https://git.kernel.org/stable/c/0414eab7c78f3518143d383e448d44fc573ac6d2
https://git.kernel.org/stable/c/245b993d8f6c4e25f19191edfbd8080b645e12b1
https://git.kernel.org/stable/c/937fcbb55a1e48a6422e87e8f49422c92265f102
https://git.kernel.org/stable/c/cff3a7ce6e81418b6e8bac941779bbf5d342d626
https://git.kernel.org/stable/c/db965e2757d95f695e606856418cd84003dd036d
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.124


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.



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