{"id":"CVE-2026-89721","summary":"phy: rockchip-samsung-dcphy: fix out-of-range max_register","details":"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.","modified":"2026-09-13T03:47:20.578047489Z","published":"2026-09-11T19:46:33.680Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89721.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89721.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89721"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b"},{"fixed":"14afe18655c0951f4f85898f761bf92264e65ccd"},{"fixed":"c1a62f9dcf531d56c56da2e4435386b6d264c69f"},{"fixed":"4486e75ba647bd8b98fc1f053101b40caceeed4b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89721.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.18.50"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89721.json"}}],"schema_version":"1.9.0"}