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.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd
https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b
https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:20

Updated : 2026-09-11 20:20

NVD link : CVE-2026-89721

Mitre link : CVE-2026-89721

CVE.ORG link : CVE-2026-89721

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-89721", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "14afe18655c0951f4f85898f761bf92264e65ccd", "versionType": "git"}, {"status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "c1a62f9dcf531d56c56da2e4435386b6d264c69f", "versionType": "git"}, {"status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "4486e75ba647bd8b98fc1f053101b40caceeed4b", "versionType": "git"}], "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"status": "unaffected", "version": "0", "lessThan": "6.15", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "defaultStatus": "affected"}]}], "published": "2026-09-11T20:20:01.090", "references": [{"url": "https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphy: rockchip-samsung-dcphy: fix out-of-range max_register\n\nThe PHY register block is 64KB, so with a register stride of 4 the\nlast accessible register sits at offset 0xfffc. max_register names\n0x10000, one register past the end of the mapping: dumping the\nregisters through the regmap debugfs interface reads beyond the\nioremapped region and oopses on the unmapped page. The oops fires\nwith the regmap lock held, so later PHY operations deadlock."}], "lastModified": "2026-09-11T20:20:01.090", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}