PT-2025-25925 · Linux+2 · Linux Kernel+2

Published 2022-08-23 · Updated 2025-11-14 · CVE-2022-49999

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A space cache corruption and potential double allocation issue has been identified in the Linux kernel. The issue arises from a race between caching free space for a block group and returning free space to the in-memory space cache for pinned extents, causing a double-add of a free range to the space cache. This race occurs when free space is cached from the free space tree or the extent tree. The issue is caused by a subtle break in the protection against this race, introduced by a commit that allowed multiple transactions to be unpinning extents at the same time.

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

Exploit

Race Condition

Memory Corruption

Improper Locking

Weakness Enumeration

CWE-362

CWE-787

CWE-667

Related Identifiers

BDU:2026-03378

CVE-2022-49999

SUSE-SU-2025:02264-1

SUSE-SU-2025:02321-1

SUSE-SU-2025:02322-1

SUSE-SU-2025:02537-1

SUSE-SU-2025:2264-1

SUSE-SU-2025_02264-1

SUSE-SU-2025_02537-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 592

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49999.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2022-49999 · Vendor Advisory
• https://git.kernel.org/stable/c/ced8ecf026fd8084cf175530ff85c76d6085d715 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:02537-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02264-1 · Vendor Advisory
• https://git.kernel.org/stable/c/92dc4c1a8e58bcc7a183a4c86b055c24cc88d967 · Patch
• https://bdu.fstec.ru/vul/2026-03378 · Security Note
• https://git.kernel.org/stable/c/a2e54eb64229f07f917b05d0c323604fda9b89f7 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:02321-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49999 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49999 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49999 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49999 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49999 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49999 · Security Note