PT-2020-6914 · Linux+1 · Linux Kernel+1

Published 2020-06-19 · Updated 2023-11-02 · CVE-2020-36766

Positive Technologies (AI Summary)

CVSS v3.1

3.3

Low

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.8.6

Description An issue in the Linux kernel's drivers/media/cec/core/cec-api.c leaks one byte of kernel memory on specific hardware to unprivileged users. This occurs because of directly assigning log addrs with a hole in the struct, which is related to improper handling of input data concerning the cec log addrs structure. Exploitation of this issue may allow an attacker to cause a denial of service.

Recommendations For Linux kernel versions prior to 5.8.6, update to version 5.8.6 or later to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable cec-api.c component until a patch is available.

Fix

Weakness Enumeration

CWE-237

CWE-228

Related Identifiers

BDU:2023-05906

CVE-2020-36766

OESA-2023-1727

OESA-2023-1728

OPENSUSE-SU-2023_4347-1

SUSE-SU-2023:4030-1

SUSE-SU-2023:4031-1

SUSE-SU-2023:4032-1

SUSE-SU-2023:4033-1

SUSE-SU-2023:4095-1

SUSE-SU-2023:4142-1

SUSE-SU-2023:4347-1

SUSE-SU-2023_4030-1

SUSE-SU-2023_4031-1

SUSE-SU-2023_4032-1

SUSE-SU-2023_4033-1

SUSE-SU-2023_4095-1

Affected Products

Linux Kernel

Suse

References · 125

• https://github.com/torvalds/linux/commit/6c42227c3467549ddc65efe99c869021d2f4a570 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-36766 · Security Note
• https://osv.dev/vulnerability/OESA-2023-1728 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4030-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-36766 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-36766 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4032-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4031-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4033-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-36766 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4095-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2023:4142-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2023-1727 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-42753 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2023:4347-1 · Vendor Advisory