#VU34414 Buffer overflow in Linux kernel - CVE-2020-12465

Vulnerability identifier: #VU34414

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12465

CWE-ID: CWE-120

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local privileged user to execute arbitrary code.

An array overflow was discovered in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10, aka CID-b102f0c522cf. An oversized packet with too many rx fragments can corrupt memory of adjacent pages.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.5.1 - 5.5.9

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External links
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.10
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b102f0c522cf668c8382c56a4f771b37d011cda2
https://github.com/torvalds/linux/commit/b102f0c522cf668c8382c56a4f771b37d011cda2
https://security.netapp.com/advisory/ntap-20200608-0001/

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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.