CVE-2026-89721
Unknown
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.
SeverityUnknown
CVSS—
Exploit probability—
Product
Linux
PublishedSep 11, 2026
First seenSep 11, 2026
How to fix
Update
- Linux Linux14afe18655c0951f4f85898f761bf92264e65ccd, c1a62f9dcf531d56c56da2e4435386b6d264c69f, 4486e75ba647bd8b98fc1f053101b40caceeed4b or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b ≤ v < 14afe18655c0951f4f85898f761bf92264e65ccd, b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b ≤ v < c1a62f9dcf531d56c56da2e4435386b6d264c69f, b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b ≤ v < 4486e75ba647bd8b98fc1f053101b40caceeed4b, 6.15 | 14afe18655c0951f4f85898f761bf92264e65ccd, c1a62f9dcf531d56c56da2e4435386b6d264c69f, 4486e75ba647bd8b98fc1f053101b40caceeed4b |
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