PT-2025-7956 · Linux+3 · Linux Kernel+3

Published 2025-02-26 · Updated 2025-09-29 · CVE-2021-47645

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A issue in the Linux kernel has been identified, specifically in the media staging component related to zoran. The problem arises when tmp dcim equals 1, causing a miscalculation of the buffer index. This miscalculation leads to a NULL pointer dereference. The fix involves correcting the calculation and adding a check to prevent the issue from recurring.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-47645

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025:1293-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

SUSE-SU-2025_1293-1

Affected Products

Astra Linux

Linux Kernel

Red Os

Suse

References · 1486

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2022_0995_watch_queue.rb · Exploit
• 🔥 https://github.com/qazbnm456/awesome-cve-poc/blob/master/CVE-2017-5753.md · Exploit
• 🔥 https://github.com/Bonfee/CVE-2022-0995 · Exploit
• 🔥 https://github.com/TurtleARM/CVE-2023-0179-PoC · Exploit
• 🔥 https://github.com/H4K6/CVE-2023-0179-PoC · Exploit
• 🔥 https://github.com/EdwardOwusuAdjei/Spectre-PoC · Exploit
• https://git.kernel.org/stable/c/e3b86f4e558cea9eed71d894df2f19b10d60a207 · Patch
• https://ubuntu.com/security/CVE-2021-47645 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1293-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47645 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47645 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47645 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://git.kernel.org/stable/c/20811bbe685ca3eddd34b0c750860427d7030910 · Patch