PT-2025-8573 · Linux+2 · Linux Kernel+2

Kuniyuki Iwashima · Published 2025-02-26 · Updated 2025-04-16 · CVE-2022-49640

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/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 data race issue exists in the Linux kernel due to concurrent access to a sysctl variable. This issue can lead to load/store-tearing. The problem arises from the lack of protection for readers and writers accessing the variable simultaneously. The patch resolves this by using READ ONCE() and WRITE ONCE() internally in proc douintvec minmax() to prevent data-races.

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

Exploit

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2022-49640

OPENSUSE-SU-2025_1263-1

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1194-1

SUSE-SU-2025:1241-1

SUSE-SU-2025:1263-1

SUSE-SU-2025:1293-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

SUSE-SU-2025_1263-1

SUSE-SU-2025_1293-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 1491

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49640.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2025:1263-1 · Vendor Advisory
• https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea · Patch
• https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1293-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49640 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49640 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49640 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49640 · Security Note
• https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293 · Patch
• https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1194-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49640 · Vendor Advisory