CVE-2021-47193: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Fix memory leak during rmmod Driver failed to release all memory allocated. This would lead to memory leak during driver removal. Properly free memory when the module is removed.

Is your site exposed to CVE-2021-47193?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-401 CWE-401

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 5.15.5

References

Advisories & Patches

https://git.kernel.org/stable/c/269a4311b15f68d24e816f43f123888f241ed13d https://git.kernel.org/stable/c/51e6ed83bb4ade7c360551fa4ae55c4eacea354b https://git.kernel.org/stable/c/269a4311b15f68d24e816f43f123888f241ed13d https://git.kernel.org/stable/c/51e6ed83bb4ade7c360551fa4ae55c4eacea354b

Other References

https://git.kernel.org/stable/c/0c4398f2ee030d5753f6b0ad83f0ed9077851d9a https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html

Frequently Asked Questions

What is CVE-2021-47193? +

In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Fix memory leak during rmmod Driver failed to release all memory allocated. This would lead to memory leak during driver removal. Properly free memory when the module is removed. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47193? +

CVE-2021-47193 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2021-47193? +

CVE-2021-47193 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2021-47193? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-0646

A denial-of-service security issue exists within the 1794-AENTR adapter due to improper memory handling of CIP protocol requests. This vulnerability …

CVE-2026-20746

Virtual attribute handling in Ping Identity PingDirectory in affected versions allows only authorized users to exhaust java memory heap when …

CVE-2026-93926

Missing release of memory after effective lifetime, Missing release of resource after effective lifetime vulnerability in Apache Thrift THeaderTransport. This …

CVE-2026-53429

Missing Release of Memory after Effective Lifetime vulnerability in leandrocp mdex and mdex_native allows an attacker who controls a rendered …

CVE-2026-94652

Missing release of memory after effective lifetime vulnerability in Apache Thrift c++ bindings. This issue affects Apache Thrift: before 0.25.0. …

CVE-2026-13148

Missing release of memory after effective lifetime vulnerability in Softing smartLink allows resource leak exposure. This issue affects smartLink HW-PN: …

CVE-2021-47193