#VU104470 Use-after-free in Linux kernel - CVE-2022-49136

Vulnerability identifier: #VU104470

Vulnerability 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-2022-49136

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hci_cmd_sync_queue() function in net/bluetooth/hci_sync.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1, 5.17.2

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External links
https://git.kernel.org/stable/c/0b94f2651f56b9e4aa5f012b0d7eb57308c773cf
https://git.kernel.org/stable/c/1c69ef84a808676cceb69210addf5df45b741323
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3

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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.