#VU90301 Out-of-bounds read in Linux kernel - CVE-2021-47346

Vulnerability identifier: #VU90301

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47346

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

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

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

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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.