PT-2024-11324 · Linux+1 · Linux Kernel+1

Xiyu Yang · Published 2021-06-11 · Updated 2025-01-13 · CVE-2021-47325

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 reference counting issue occurs in the Linux kernel's iommu/arm-smmu component, specifically in the arm smmu iova to phys hard() function. This issue arises when error scenarios occur in several exception handling paths, causing the function to forget to decrease the refcount of smmu increased by arm smmu rpm get(), resulting in a refcount leak. The issue is resolved by jumping to the "out" label when these error scenarios occur.

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:2025-07396

CVE-2021-47325

Affected Products

Astra Linux

Linux Kernel

References · 21

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47325 · Vendor Advisory
• https://git.kernel.org/stable/c/b11220803ad14a2a880cc06d8e01fe2548cc85b0 · Patch
• https://bdu.fstec.ru/vul/2025-07396 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47325 · Vendor Advisory
• https://git.kernel.org/stable/c/5f9741a9a91f25c89e04b408cd61e3ab050ce24b · Patch
• https://git.kernel.org/stable/c/0f0c5ea09139777d90729d408b807021f2ea6492 · Patch
• https://git.kernel.org/stable/c/43d1aaa1965f9b58035196dac49b1e1e6c9c25eb · Patch
• https://git.kernel.org/stable/c/7c8f176d6a3fa18aa0f8875da6f7c672ed2a8554 · Patch
• https://cve.org/CVERecord?id=CVE-2021-47325 · Security Note
• https://ubuntu.com/security/CVE-2021-47325 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-47325 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47325 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-47325 · Security Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52 · Note
• https://kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19 · Note