What’s Vulnerable › Vulnerabilities

CVE-2023-54279: MIPS: fw: Allow firmware to pass a empty env

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-30 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: MIPS: fw: Allow firmware to pass a empty env fw_getenv will use env entry to determine style of env, however it is legal for firmware to just pass a empty list. Check if first entry exist before running strchr to avoid null pointer dereference.

Affected products

• Linux kernel: 3.10 — fixed in 6.4

How to fix

Upgrade to a fixed version: Linux kernel 6.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0f91290774c798199ba4b8df93de5c3156b5163d
• https://git.kernel.org/stable/c/3ef93b7bd9e042db240843f24a80e14da38c6830
• https://git.kernel.org/stable/c/47e61cadc7a5f3dffd42d2d6fda81be163f1ab82
• https://git.kernel.org/stable/c/830181ddced5a05a711dc9da8043203b1f33a77e
• https://git.kernel.org/stable/c/a6b54af407873227caef6262e992f5422cdcb6ae
• https://git.kernel.org/stable/c/ad79828f133e98585ab2236cad04a55eb7141bbe
• https://git.kernel.org/stable/c/aeed787bbbbe1b842beec9a065a36c915226f704
• https://git.kernel.org/stable/c/ee1809ed7bc456a72dc8410b475b73021a3a68d5
• https://git.kernel.org/stable/c/f334b31625683418aaa2a335470eec950a95a254

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