CVE-2021-47050: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: memory: renesas-rpc-if: fix possible NULL pointer dereference of resource The platform_get_resource_byname() can return NULL which would be immediately dereferenced by resource_size(). Instead dereference it after validating the resource. Addresses-Coverity: Dereference null return value

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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-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.9 — 5.10.37
linux	linux_kernel	5.11 — 5.11.21
linux	linux_kernel	5.12 — 5.12.4

References

Advisories & Patches

https://git.kernel.org/stable/c/59e27d7c94aa02da039b000d33c304c179395801 https://git.kernel.org/stable/c/71bcc1b4a1743534d8abdcb57ff912e6bc390438 https://git.kernel.org/stable/c/a74cb41af7dbe019e4096171f8bc641c7ce910ad https://git.kernel.org/stable/c/e16acc3a37f09e18835dc5d8014942c2ef6ca957 https://git.kernel.org/stable/c/59e27d7c94aa02da039b000d33c304c179395801 https://git.kernel.org/stable/c/71bcc1b4a1743534d8abdcb57ff912e6bc390438 https://git.kernel.org/stable/c/a74cb41af7dbe019e4096171f8bc641c7ce910ad https://git.kernel.org/stable/c/e16acc3a37f09e18835dc5d8014942c2ef6ca957

Frequently Asked Questions

What is CVE-2021-47050? +

In the Linux kernel, the following vulnerability has been resolved: memory: renesas-rpc-if: fix possible NULL pointer dereference of resource The platform_get_resource_byname() can return NULL which would be immediately dereferenced by resource_size(). Instead dereference it after validating the resource. Addresses-Coverity: Dereference null return value It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47050? +

CVE-2021-47050 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-2021-47050? +

CVE-2021-47050 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-2021-47050? +

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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