{"id":"CVE-2026-80931","title":"kernel: w1: ds28e17: reject an oversize length on an I2C block read (CVE-2026-80931)","summary":"A flaw was found in the Linux kernel's w1: ds28e17 1-Wire to I2C bridge driver. A malicious I2C slave device can provide an oversized length during an I2C block read operation. This causes the driver to read beyond the allocated buffer, le…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","vendor":"Red Hat","product":"Linux","affected":["Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < b30c021c6073559ea6851b522d8a17a524a27b4a","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < 1d08877fc37e90945df38d255715bd1d6c052d46","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < bf76d61e118b7044600a65775a3bf8adc2c6823d","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < 0f6496b34cc2919420f303b2aabdd9f71e084b56","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < cb55c5da9828f77db2a2701316949d4de1e9b773","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < ae0c79a8527044e54d81fd5a3b49ce6177633758","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < 6df05f630c84a109736642362e452089886f9974","Linux >= ebc4768ac4971eab4b570e733e47ac9dfd0e4175 < 169ae5e65e5aaf213b6a578f6478a9fd2e523606","Linux 4.15"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T14:48:08+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80931.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80931.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80931"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532277"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80931"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80931"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80931.mbox"},{"url":"https://git.kernel.org/stable/c/b30c021c6073559ea6851b522d8a17a524a27b4a"},{"url":"https://git.kernel.org/stable/c/1d08877fc37e90945df38d255715bd1d6c052d46"},{"url":"https://git.kernel.org/stable/c/bf76d61e118b7044600a65775a3bf8adc2c6823d"},{"url":"https://git.kernel.org/stable/c/0f6496b34cc2919420f303b2aabdd9f71e084b56"},{"url":"https://git.kernel.org/stable/c/cb55c5da9828f77db2a2701316949d4de1e9b773"},{"url":"https://git.kernel.org/stable/c/ae0c79a8527044e54d81fd5a3b49ce6177633758"},{"url":"https://git.kernel.org/stable/c/6df05f630c84a109736642362e452089886f9974"},{"url":"https://git.kernel.org/stable/c/169ae5e65e5aaf213b6a578f6478a9fd2e523606"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00129,"epssPercentile":0.02908,"scores":{"vendor":5.5,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.455Z","slug":"CVE-2026-80931","body":"## Overview\n\nA flaw was found in the Linux kernel's w1: ds28e17 1-Wire to I2C bridge driver. A malicious I2C slave device can provide an oversized length during an I2C block read operation. This causes the driver to read beyond the allocated buffer, leading to an out-of-bounds read of up to 222 bytes. This vulnerability could allow a local attacker to disclose sensitive information or cause a denial of service.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80931.json)\n\n**kernel: w1: ds28e17: reject an oversize length on an I2C block read** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":202771,"id":"CVE-2026-80931","ts":1789403715820,"field":"cvss","old":"7.8","new":"5.5"},{"seq":202770,"id":"CVE-2026-80931","ts":1789403715820,"field":"severity","old":"high","new":"medium"},{"seq":183634,"id":"CVE-2026-80931","ts":1789356676191,"field":"cvss","old":"7.8","new":"4.7"},{"seq":183633,"id":"CVE-2026-80931","ts":1789356676191,"field":"severity","old":"high","new":"medium"},{"seq":153112,"id":"CVE-2026-80931","ts":1789285349056,"field":"cvss","old":null,"new":"7.8"},{"seq":153111,"id":"CVE-2026-80931","ts":1789285349056,"field":"severity","old":"none","new":"high"},{"seq":147460,"id":"CVE-2026-80931","ts":1789270210994,"field":"cvss","old":null,"new":"4.7"},{"seq":147459,"id":"CVE-2026-80931","ts":1789270210994,"field":"severity","old":"none","new":"medium"},{"seq":109212,"id":"CVE-2026-80931","ts":1789183730747,"field":"cvss","old":null,"new":"4.7"},{"seq":109211,"id":"CVE-2026-80931","ts":1789183730747,"field":"severity","old":"none","new":"medium"}]}