Bug 2425130 (CVE-2023-54104)

Summary: CVE-2023-54104 kernel: mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-24 14:05:10 UTC 
In the Linux kernel, the following vulnerability has been resolved:

mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op()

'op-cs' is copied in 'fun->mchip_number' which is used to access the
'mchip_offsets' and the 'rnb_gpio' arrays.
These arrays have NAND_MAX_CHIPS elements, so the index must be below this
limit.

Fix the sanity check in order to avoid the NAND_MAX_CHIPS value. This
would lead to out-of-bound accesses.
Comment 1 Alexander B 2025-12-25 00:14:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122411-CVE-2023-54104-32e0@gregkh/T