CVE-2021-47539: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() Need to call rxrpc_put_peer() for bundle candidate before kfree() as it holds a ref to rxrpc_peer. [DH: v2: Changed to abstract out the bundle freeing code into a function]

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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	5.10 — 5.10.84
linux	linux_kernel	5.11 — 5.15.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/35b40f724c4ef0f683d94dab3af9ab38261d782b https://git.kernel.org/stable/c/bc97458620e38961af9505cc060ad4cf5c9e4af7 https://git.kernel.org/stable/c/ca77fba821351190777b236ce749d7c4d353102e https://git.kernel.org/stable/c/35b40f724c4ef0f683d94dab3af9ab38261d782b https://git.kernel.org/stable/c/bc97458620e38961af9505cc060ad4cf5c9e4af7 https://git.kernel.org/stable/c/ca77fba821351190777b236ce749d7c4d353102e

Frequently Asked Questions

What is CVE-2021-47539? +

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxrpc_peer leak in rxrpc_look_up_bundle() Need to call rxrpc_put_peer() for bundle candidate before kfree() as it holds a ref to rxrpc_peer. [DH: v2: Changed to abstract out the bundle freeing code into a function] It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47539? +

CVE-2021-47539 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-2021-47539? +

CVE-2021-47539 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-2021-47539? +

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-2021-47539