phy: rockchip-samsung-dcphy: fix out-of-range max_register (CVE-2026-89721) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89721

phy: rockchip-samsung-dcphy: fix out-of-range max_register

Answer in brief

CVE-2026-89721 records a Unknown severity vulnerability in phy: rockchip-samsung-dcphy: fix out-of-range max_register. 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 Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. 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	>=b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b <14afe18655c0951f4f85898f761bf92264e65ccd \|\| >=b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b <c1a62f9dcf531d56c56da2e4435386b6d264c69f \|\| >=b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b <4486e75ba647bd8b98fc1f053101b40caceeed4b	14afe18655c0951f4f85898f761bf92264e65ccd, c1a62f9dcf531d56c56da2e4435386b6d264c69f, 4486e75ba647bd8b98fc1f053101b40caceeed4b
Linux/Linuxgeneric	6.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 14afe18655c0951f4f85898f761bf92264e65ccd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: phy: rockchip-samsung-dcphy: fix out-of-range max_register The PHY register block is 64KB, so with a register stride of 4 the last accessible register sits at offset 0xfffc. max_register names 0x10000, one register past the end of the mapping: dumping the registers through the regmap debugfs interface reads beyond the ioremapped region and oopses on the unmapped page. The oops fires with the regmap lock held, so later PHY operations deadlock.

Quoted source text, attributed separately from HOL analysis.