PT-2021-8190 · Linux+3 · Linux Kernel+3

Johan Hovold · Published 2021-10-26 · Updated 2024-11-25 · CVE-2021-47474

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a bulk-buffer overflow in the comedi driver, specifically in the vmk80xx component. The driver uses endpoint-sized buffers but does not account for the possibility of unequal sizes between the tx and rx buffers, which could allow a malicious device to overflow the slab-allocated receive buffer during bulk transfers. This could potentially lead to a denial of service or allow an attacker to access confidential information.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

BDU:2024-10518

CVE-2021-47474

OESA-2024-1736

OPENSUSE-SU-2024_2189-1

SUSE-SU-2024:2008-1

SUSE-SU-2024:2011-1

SUSE-SU-2024:2019-1

SUSE-SU-2024:2189-1

SUSE-SU-2024:2190-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1318

• 🔥 https://github.com/lanleft/CVE-2023-1829 · Exploit
• https://git.kernel.org/stable/c/063f576c43d589a4c153554b681d32b3f8317c7b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-36934 · Security Note
• https://git.kernel.org/stable/c/78cdfd62bd54af615fba9e3ca1ba35de39d3871d · Patch
• https://git.kernel.org/stable/c/7b0e356189327287d0eb98ec081bd6dd97068cd3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-47483 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-35819 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47474 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-35828 · Security Note
• https://git.kernel.org/stable/c/b7fd7f3387f070215e6be341e68eb5c087eeecc0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-35935 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47301 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-48693 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2019-1 · Vendor Advisory
• https://git.kernel.org/stable/c/1ae4715121a57bc6fa29fd992127b01907f2f993 · Patch