CVE-2026-89721

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89721", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.752Z", "datePublished": "2026-09-11T19:46:33.680Z", "dateUpdated": "2026-10-19T08:51:33.997Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:51:33.997Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "versions": [{"version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "14afe18655c0951f4f85898f761bf92264e65ccd", "status": "affected", "versionType": "git"}, {"version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "c1a62f9dcf531d56c56da2e4435386b6d264c69f", "status": "affected", "versionType": "git"}, {"version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "lessThan": "4486e75ba647bd8b98fc1f053101b40caceeed4b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd"}, {"url": "https://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"}, {"url": "https://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b"}], "title": "phy: rockchip-samsung-dcphy: fix out-of-range max_register", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "14afe18655c0951f4f85898f761bf92264e65ccd", "status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "versionType": "git"}, {"lessThan": "c1a62f9dcf531d56c56da2e4435386b6d264c69f", "status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "versionType": "git"}, {"lessThan": "4486e75ba647bd8b98fc1f053101b40caceeed4b", "status": "affected", "version": "b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/phy/rockchip/phy-rockchip-samsung-dcphy.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-89721", "lastModified": "2026-10-19T09:18:12.280", "metrics": {}, "published": "2026-09-11T20:20:01.090", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: `rockchip-samsung-dcphy` out-of-bounds read leads to denial of service", "id": "2532300", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532300"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's `phy: rockchip-samsung-dcphy` component. A local attacker with access to the `regmap debugfs` interface could trigger an out-of-bounds read by attempting to dump registers. This occurs because the `max_register` value is incorrectly set, causing the system to read beyond the allocated memory region. Successful exploitation leads to a kernel crash (oops) and a subsequent deadlock of physical layer (PHY) operations, resulting in a denial of service."], "name": "CVE-2026-89721", "public_date": "2026-09-11T19:46:33Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89721\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89721\nhttps://git.kernel.org/stable/c/14afe18655c0951f4f85898f761bf92264e65ccd\nhttps://git.kernel.org/stable/c/4486e75ba647bd8b98fc1f053101b40caceeed4b\nhttps://git.kernel.org/stable/c/c1a62f9dcf531d56c56da2e4435386b6d264c69f"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b,14afe18655c0951f4f85898f761bf92264e65ccd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b,c1a62f9dcf531d56c56da2e4435386b6d264c69f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b2a1a2ae7818c9d8da12bf7b1983c8b9f5fb712b,4486e75ba647bd8b98fc1f053101b40caceeed4b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.50,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.4,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T06:30:09.003602+00:00", "updated": "2026-09-15T19:30:12.140785+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}