Bug 2401519 (CVE-2023-53541)

Summary: CVE-2023-53541 kernel: mtd: rawnand: brcmnand: Fix potential out-of-bounds access in oob write
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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A buffer overflow vulnerability was found in the Linux kernel's Broadcom NAND controller driver when writing out-of-band data. When the OOB buffer length isn't a multiple of word size, the write function performs an out-of-bounds read on the source buffer during its final iteration. This can read beyond allocated memory and potentially cause memory corruption or crashes, resulting in denial of service.
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Description OSIDB Bzimport 2025-10-04 16:05:13 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mtd: rawnand: brcmnand: Fix potential out-of-bounds access in oob write

When the oob buffer length is not in multiple of words, the oob write
function does out-of-bounds read on the oob source buffer at the last
iteration. Fix that by always checking length limit on the oob buffer
read and fill with 0xff when reaching the end of the buffer to the oob
registers.
Comment 1 Alexander B 2025-10-06 14:14:15 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100444-CVE-2023-53541-d961@gregkh/T