mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op() (CVE-2023-54104) | HOL Guard CVE

High · CVSS 7.8CVE-2023-54104

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

Answer in brief

CVE-2023-54104 records a High severity (CVSS 7.8) vulnerability in mtd: rawnand: fsl_upm: Fix an off-by one test in fun_exec_op(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Dec 24, 2025Updated Aug 5, 2026Source checked Sep 19, 2026First seen by HOL Aug 4, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=54309d65776755bcdb9dcf3744cd764fc1e254ea <1f09d67d390647f83f8f9d26382b0daa43756e6f \|\| >=54309d65776755bcdb9dcf3744cd764fc1e254ea <eb7a5e4d14c8659cb97db6863316280e15f67209 \|\| >=54309d65776755bcdb9dcf3744cd764fc1e254ea <f4b700c71802c81e6f9dce362ee7a0312c8377ba \|\| >=54309d65776755bcdb9dcf3744cd764fc1e254ea <49e57caf967a969f6b955c88805f2d160910aa12 \|\| >=54309d65776755bcdb9dcf3744cd764fc1e254ea <c6abce60338aa2080973cd95be0aedad528bb41f	1f09d67d390647f83f8f9d26382b0daa43756e6f, eb7a5e4d14c8659cb97db6863316280e15f67209, f4b700c71802c81e6f9dce362ee7a0312c8377ba, 49e57caf967a969f6b955c88805f2d160910aa12, c6abce60338aa2080973cd95be0aedad528bb41f
Linux/Linuxgeneric	5.9	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 1f09d67d390647f83f8f9d26382b0daa43756e6f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Dec 24, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 4, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.