PT-2025-9013 · Linux+1 · Linux Kernel+1

Published 2025-02-11 · Updated 2025-02-28 · CVE-2025-21822

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 resolved. The problem occurs when vmclock ptp register() fails during probing, leading to vmclock remove() being called to clean up the ptp clock and misc device. This uses dev get drvdata() to access the vmclock state, but the driver data is not yet set at this point. The fix involves assigning the driver data earlier.

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

Exploit

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

Related Identifiers

BDU:2026-03990

CVE-2025-21822

Affected Products

Astra Linux

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21822.json · Exploit
• https://git.kernel.org/stable/c/6dbd8b91a065d1d8001446a28e72cd140f9acef0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-21822 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21822 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03990 · Security Note
• https://cve.org/CVERecord?id=CVE-2025-21822 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21822 · Vendor Advisory
• https://git.kernel.org/stable/c/f7d07cd4f77d77f366c8ffbb8ba8b61f614e5fce · Patch
• https://ubuntu.com/security/CVE-2025-21822 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2025022707-CVE-2025-21822-88c0@gregkh · Note
• https://t.me/cvedetector/19092 · Telegram Post
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/f7d07cd4f77d77f366c8ffbb8ba8b61f614e5fce · Note
• https://twitter.com/CVEnew/status/1895241143354626052 · Twitter Post