#VU104730 Double free in Linux kernel - CVE-2022-49339

Vulnerability identifier: #VU104730

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-2022-49339

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 seg6_hmac_init() function in net/ipv6/seg6_hmac.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

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External links
https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90
https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290
https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755
https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c
https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a
https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e
https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a
https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0

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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.