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CVE-2026-89721

Unknown

Last modified

CVE-2026-89721 is a vulnerability of currently unknown severity. 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.

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b, < 14afe18655c0951f4f85898f761bf92264e65ccd; >= b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b, < c1a62f9dcf531d56c56da2e4435386b6d264c69f; >= b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b, < 4486e75ba647bd8b98fc1f053101b40caceeed4b
LinuxLinux6.15

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89721?
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.
How severe is CVE-2026-89721?
Severity scoring for CVE-2026-89721 is pending analysis.
How do I fix CVE-2026-89721?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST