Use-after-free in Linux kernel mt76 mt7921 driver

1) Use-after-free

EUVDB-ID: #VU90201

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-2024-26892

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 mt792x_irq_handler() function in drivers/net/wireless/mediatek/mt76/mt792x_dma.c, within the mt7921_pci_remove() function in drivers/net/wireless/mediatek/mt76/mt7921/pci.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/c7dd42fbebcfb02bef070fd48f774d6412d0b49d
http://git.kernel.org/stable/c/bfe1adf1606f76c180324e53b130f0e76d5cc6c3
http://git.kernel.org/stable/c/bfeaef901194c5923ce3330272786eff2fac513a
http://git.kernel.org/stable/c/c957280ef6ab6bdf559a91ae693a6b34310697e3

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.