PT-2025-8859 · Linux+1 · Linux Kernel+1

Published 2025-01-28 · Updated 2025-02-28 · CVE-2025-21747

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 vulnerability in the Linux kernel has been resolved, related to the ASTDP transmitter taking up to 1 second to enable the video signal, while the timeout is only 200 msec, resulting in a kernel error message. The issue is cosmetic, as enabling the video signal still works even with the error message. The problem has always been present but only recent versions of the ast driver warn about missing the timeout.

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

Exploit

Generation of Error Message Containing Sensitive Information

Weakness Enumeration

CWE-209

Related Identifiers

BDU:2026-03880

CVE-2025-21747

Affected Products

Astra Linux

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21747.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-21747 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21747 · Vendor Advisory
• https://git.kernel.org/stable/c/589839379031cce220c9cab9f27cb5477195067e · Patch
• https://cve.org/CVERecord?id=CVE-2025-21747 · Security Note
• https://bdu.fstec.ru/vul/2026-03880 · Security Note
• https://git.kernel.org/stable/c/fd39c41bcd82d5ebaaebadb944eab5598c668a90 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-21747 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21747 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.3 · Note
• https://lore.kernel.org/linux-cve-announce/2025022601-CVE-2025-21747-a514@gregkh · Note
• https://twitter.com/CVEnew/status/1895260268667474101 · Twitter Post
• https://git.kernel.org/linus/fd39c41bcd82d5ebaaebadb944eab5598c668a90 · Note