Out-of-bounds read in Linux kernel hwtracing coresight driver

1) Out-of-bounds read

EUVDB-ID: #VU90301

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47346

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the tmc_update_etf_buffer() function in drivers/hwtracing/coresight/coresight-tmc-etf.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

External links

http://git.kernel.org/stable/c/04bd77ef4f4d9fc6102023b85f4590fc2130aac5
http://git.kernel.org/stable/c/ef0a06acc6b16388640ad367eedfa2a17f1945db
http://git.kernel.org/stable/c/35c1c4bd2d59ad734129d4e232af9d1098023918
http://git.kernel.org/stable/c/733d4d95c0101d5f277b8e4910411d016e49a9dc
http://git.kernel.org/stable/c/0115687be7b13993066aef602253a53d55f5b11f
http://git.kernel.org/stable/c/5fae8a946ac2df879caf3f79a193d4766d00239b

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.