PT-2021-8263 · Linux+2 · Linux Kernel+2

Hulk Robot · Published 2021-04-09 · Updated 2024-12-09 · CVE-2021-47051

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 The issue is related to a resource leak in the lpspi prepare xfer hardware() function of the Linux kernel. This leak occurs because pm runtime get sync increments the power management usage counter even if it fails, and forgetting to perform the corresponding put operation results in a reference leak. The fix involves replacing pm runtime get sync with pm runtime resume and get to maintain a balanced usage counter. Exploitation of this issue may allow an attacker to cause a denial of service.

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

Weakness Enumeration

CWE-402

Related Identifiers

BDU:2025-00801

CVE-2021-47051

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1454-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 345

• https://osv.dev/vulnerability/SUSE-SU-2024:1489-1 · Vendor Advisory
• https://git.kernel.org/stable/c/a03675497970a93fcf25d81d9d92a59c2d7377a7 · Patch
• https://osv.dev/vulnerability/CVE-2021-47051 · Vendor Advisory
• https://git.kernel.org/stable/c/4a01ad002d2e03c399af536562693752af7c81b1 · Patch
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47051 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47051 · Security Note
• https://git.kernel.org/stable/c/6a2b5cee0d31ab6cc51030c441135b0e31217282 · Patch
• https://ubuntu.com/security/CVE-2021-47051 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47051 · Vendor Advisory
• https://git.kernel.org/stable/c/ce02e58ddf8658a4c3bed2296f32a5873b3f7cce · Patch
• https://bdu.fstec.ru/vul/2025-00801 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:1465-1 · Vendor Advisory
• https://git.kernel.org/stable/c/b8207bfc539cd07d15e753ff2d179c5b61c673b1 · Patch
• https://cve.org/CVERecord?id=CVE-2021-47051 · Security Note