Bug 2426205 (CVE-2023-54279)

Summary: CVE-2023-54279 kernel: MIPS: fw: Allow firmware to pass a empty env
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-30 13:16:18 UTC 
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.
Comment 1 Alexander B 2025-12-31 01:31:53 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123003-CVE-2023-54279-1dfa@gregkh/T