#VU89266 Memory leak in Linux kernel - CVE-2020-36780

Vulnerability identifier: #VU89266

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-2020-36780

CWE-ID: CWE-401

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 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

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

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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.