CVE-2021-47134 efi/fdt: fix panic when no valid fdt found

What is CVE-2021-47134?

CVE-2021-47134 is a medium-severity vulnerability in Linux kernel, published on 15 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

efi/fdt: fix panic when no valid fdt found

setup_arch() would invoke efi_init()->efi_get_fdt_params(). If no valid fdt found then initial_boot_params will be null. So we should stop further fdt processing here. I encountered this issue on risc-v.

Weakness: CWE-476

Which versions are affected by CVE-2021-47134?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2021-47134?

Apply the vendor's patch.

Is CVE-2021-47134 being exploited?

There is no known exploitation of CVE-2021-47134 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2021-47134, GHSA-273c-f2cx-c649, UBUNTU-CVE-2021-47134.