Buffer overflow in Linux kernel

1) Buffer overflow

EUVDB-ID: #VU34414

Risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12465

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

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

External links

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

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.