PT-2023-2681 · Linux+1 · Linux Kernel+1

Yu Hao · Published 2023-04-24 · Updated 2026-03-14 · CVE-2023-31081

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 version 6.2

Description An issue was discovered in the Linux kernel, specifically in the drivers/media/test-drivers/vidtv/vidtv bridge.c file. The problem is related to a NULL pointer dereference in the vidtv mux stop thread function. This occurs when dvb->mux is set to NULL, and then the vidtv mux stop thread(dvb->mux) function is executed. The exploitation of this issue may allow an attacker to cause a denial of service.

Recommendations For Linux kernel version 6.2, as a temporary workaround, consider disabling the vidtv mux stop thread function until a patch is available. 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

BDU:2023-02521

CVE-2023-31081

ECHO-2107-CCE5-40BA

Affected Products

Debian

Linux Kernel

References · 18

• 🔥 https://lore.kernel.org/all/[e-mail] · Exploit
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-31081 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2023-31081 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-31081 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2023-31081 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-02521 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-31081 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-31081 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-31081 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-31081 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-31081 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-31081 · Security Note
• https://bugzilla.suse.com/show_bug.cgi?id=1210782 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-31081 · Note
• https://lore.kernel.org/all/CA+UBctDXyiosaiR7YNKCs8k0aWu4gU+YutRcnC+TDJkXpHjQag%40mail.gmail.com · Note