CVE-2021-47466: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources.

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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	4.8 — 5.4.156
linux	linux_kernel	5.5 — 5.10.76
linux	linux_kernel	5.11 — 5.14.15
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f https://git.kernel.org/stable/c/4f5d1c29cfab5cb0ab885059818751bdef32e2bb https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930 https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461 https://git.kernel.org/stable/c/42b81946e3ac9ea0372ba16e05160dc11e02694f https://git.kernel.org/stable/c/4f5d1c29cfab5cb0ab885059818751bdef32e2bb https://git.kernel.org/stable/c/568f906340b43120abd6fcc67c37396482f85930 https://git.kernel.org/stable/c/9037c57681d25e4dcc442d940d6dbe24dd31f461

Frequently Asked Questions

What is CVE-2021-47466? +

In the Linux kernel, the following vulnerability has been resolved: mm, slub: fix potential memoryleak in kmem_cache_open() In error path, the random_seq of slub cache might be leaked. Fix this by using __kmem_cache_release() to release all the relevant resources. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47466? +

CVE-2021-47466 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-2021-47466? +

CVE-2021-47466 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-2021-47466? +

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.

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CVE-2021-47466