CVE-2021-47525: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: serial: liteuart: fix use-after-free and memleak on unbind Deregister the port when unbinding the driver to prevent it from being used after releasing the driver data and leaking memory allocated by serial core.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.11 — 5.15.7

References

Advisories & Patches

https://git.kernel.org/stable/c/05f929b395dec8957b636ff14e66b277ed022ed9 https://git.kernel.org/stable/c/602824cf9aa9db8830ffe5cfb2cd54365cada4fe https://git.kernel.org/stable/c/05f929b395dec8957b636ff14e66b277ed022ed9 https://git.kernel.org/stable/c/602824cf9aa9db8830ffe5cfb2cd54365cada4fe

Frequently Asked Questions

What is CVE-2021-47525? +

In the Linux kernel, the following vulnerability has been resolved: serial: liteuart: fix use-after-free and memleak on unbind Deregister the port when unbinding the driver to prevent it from being used after releasing the driver data and leaking memory allocated by serial core. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2021-47525? +

CVE-2021-47525 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2021-47525? +

CVE-2021-47525 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-2021-47525? +

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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