#VU90161 Use-after-free in Linux kernel - CVE-2024-35843

Vulnerability identifier: #VU90161

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-2024-35843

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 prq_event_thread() function in drivers/iommu/intel/svm.c, within the intel_iommu_release_device() function in drivers/iommu/intel/iommu.c, within the alloc_iommu() function in drivers/iommu/intel/dmar.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
http://git.kernel.org/stable/c/3d39238991e745c5df85785604f037f35d9d1b15
http://git.kernel.org/stable/c/def054b01a867822254e1dda13d587f5c7a99e2a

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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.