PT-2025-8480 · Linux+1 · Linux Kernel+1

Published 2025-02-26 · Updated 2026-04-20 · CVE-2022-49547

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 deadlock can occur in the Linux kernel when multiple tasks attempt to write to the same file range in a btrfs file system, specifically when the file range covers multiple extents and the available free space is low. This deadlock can happen when one task locks a file range, creates an ordered extent, and then waits for the async data reclaim task to reserve data space, while another task is waiting for the same file range to be unlocked. The async data reclaim task is waiting for the ordered extent to complete, but it cannot complete because the file range is locked by the second task, resulting in a deadlock between the tasks and the async data reclaim task.

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

Exploit

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

AZL-58347

CVE-2022-49547

Affected Products

Astra Linux

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49547.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49547 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49547 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49547 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-49547 · Vendor Advisory
• https://git.kernel.org/stable/c/f5585f4f0ef5b17026bbd60fbff6fcc91b99d5bf · Patch
• https://osv.dev/vulnerability/AZL-58347 · Vendor Advisory
• https://git.kernel.org/stable/c/cfae6f765b3c40882ee90dae8fbf9325c8de9c35 · Patch
• https://ubuntu.com/security/CVE-2022-49547 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49547 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49547 · Security Note
• https://osv.dev/vulnerability/CVE-2022-49547 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/f5585f4f0ef5b17026bbd60fbff6fcc91b99d5bf · Note
• https://twitter.com/CVEnew/status/1894895457530188230 · Twitter Post