#VU104477 Use-after-free in Linux kernel - CVE-2022-49076

Vulnerability identifier: #VU104477

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-2022-49076

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 hfi1_mmu_rb_unregister() function in drivers/infiniband/hw/hfi1/mmu_rb.c. A local user can escalate privileges on the system.

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/0b7186d657ee55e2cdefae498f07d5c1961e8023
https://git.kernel.org/stable/c/2bbac98d0930e8161b1957dc0ec99de39ade1b3c
https://git.kernel.org/stable/c/5a9a1b24ddb510715f8f621263938186579a965c
https://git.kernel.org/stable/c/5f54364ff6cfcd14cddf5441c4a490bb28dd69f7
https://git.kernel.org/stable/c/9ca11bd8222a612de0d2f54d050bfcf61ae2883f

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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.