Use-after-free in Linux kernel iommu intel driver

1) Use-after-free

EUVDB-ID: #VU90161

Risk: Low

CVSSv3.1: 7.7 [AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-35843

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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

CPE2.3

External links

http://git.kernel.org/stable/c/3d39238991e745c5df85785604f037f35d9d1b15
http://git.kernel.org/stable/c/def054b01a867822254e1dda13d587f5c7a99e2a

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.