CVE-2021-47134

efi/fdt: fix panic when no valid fdt found

MEDIUM
5.5
CVSS Score
Published: March 15, 2024 at 08:14 PM UTC
Updated: June 17, 2026 at 04:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.10 ≤ v < 5.10.435.10 ≤ v < 5.12.105.10 ≤ v < 5.135.11 ≤ v < 5.12.105.13 rc15.13 rc25.13 rc35.13 rc4b91540d52a08b65eb6a2b09132e1bd54fa82754c
Vendor states this is fixed in 5148066edbdc89c6fe5bc419c31a5c22e5f83bdb (fixed)
Vendor states this is fixed in 668a84c1bfb2b3fd5a10847825a854d63fac7baa (fixed)
Vendor states this is fixed in 8a7e8b4e5631a03ea2fee27957857a56612108ca (fixed)
Vendor states this is fixed in 5.10 (unaffected)
Vendor states this is fixed in 5.10.43 (unaffected)
Vendor states this is fixed in 5.12.10 (unaffected)
Vendor states this is fixed in 5.13 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5148066edbdc89c6fe5bc419c31a5c22e5f83bdb
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/668a84c1bfb2b3fd5a10847825a854d63fac7baa
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/8a7e8b4e5631a03ea2fee27957857a56612108ca

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-476

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