Denial of service in Linux kernel i2c driver

1) Memory leak

EUVDB-ID: #VU89266

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/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-2020-36780

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due reference leak when pm_runtime_get_sync fails within the sprd_i2c_master_xfer() and sprd_i2c_remove() function in drivers/i2c/busses/i2c-sprd.c. A local user can perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/7e1764312440c5df9dfe6b436035a03673b0c1b9
http://git.kernel.org/stable/c/e547640cee7981fd751d2c9cde3a61bdb678b755
http://git.kernel.org/stable/c/9223505e938ba3db5907e058f4209770cff2f2a7
http://git.kernel.org/stable/c/d3406ab52097328a3bc4cbe124bfd8f6d51fb86f
http://git.kernel.org/stable/c/3a4f326463117cee3adcb72999ca34a9aaafda93

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.