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

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Summary

CVECVE-2026-89721
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:20:01 UTC
Updated2026-09-11 20:20:01 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001980000 probability, percentile 0.096800000 (date 2026-09-13)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b 14afe18655c0951f4f85898f761bf92264e65ccd git Not specified
CNA Linux Linux affected b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b c1a62f9dcf531d56c56da2e4435386b6d264c69f git Not specified
CNA Linux Linux affected b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b 4486e75ba647bd8b98fc1f053101b40caceeed4b git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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