{"id":"CVE-2026-80552","title":"s390/vfio_ccw: Ensure index for read/write regions are within range","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio_ccw: Ensure index for read/write regions are within range\n\nThe introduction of the capability chain rightly clamped the\nregion indexes to the range of the cap…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 3acbedf5c0b8e0971f0de423c05cc02bbf6ddb99","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < d3b1e38404b22df5a1f93019f2bb656feaad5ae3","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 79ea5e0c4c8a9842ae85f45062d947b3297dfc07","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < d597fa1273802941c7801202135976fecc29672b","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 649badf3a2fd8929e40198603a2cb21b74c21700","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf","Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 9f5f9a78fedc45bc29d6a0a64e3a3472361afae5","Linux 5.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:17:15.526707Z"},"published":"2026-08-26","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:26:26.482Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80552","references":[{"url":"https://git.kernel.org/stable/c/3acbedf5c0b8e0971f0de423c05cc02bbf6ddb99"},{"url":"https://git.kernel.org/stable/c/d3b1e38404b22df5a1f93019f2bb656feaad5ae3"},{"url":"https://git.kernel.org/stable/c/79ea5e0c4c8a9842ae85f45062d947b3297dfc07"},{"url":"https://git.kernel.org/stable/c/d597fa1273802941c7801202135976fecc29672b"},{"url":"https://git.kernel.org/stable/c/649badf3a2fd8929e40198603a2cb21b74c21700"},{"url":"https://git.kernel.org/stable/c/988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf"},{"url":"https://git.kernel.org/stable/c/9f5f9a78fedc45bc29d6a0a64e3a3472361afae5"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.06653,"ingestedAt":"2026-10-16T19:46:24.317Z","slug":"CVE-2026-80552","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/vfio_ccw: Ensure index for read/write regions are within range\n\nThe introduction of the capability chain rightly clamped the\nregion indexes to the range of the capabilities itself, but\nneglected to do so for the existing read/write regions which\nshould also be enforced.\n\n## Affected\n\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 3acbedf5c0b8e0971f0de423c05cc02bbf6ddb99`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < d3b1e38404b22df5a1f93019f2bb656feaad5ae3`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 79ea5e0c4c8a9842ae85f45062d947b3297dfc07`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < d597fa1273802941c7801202135976fecc29672b`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 649badf3a2fd8929e40198603a2cb21b74c21700`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 988d9b5be3c2c4baf9457ce8e11b477e13eb9fcf`\n- `Linux >= db8e5d17ac03a65e2e0ee0ba50bf61a99741d871 < 9f5f9a78fedc45bc29d6a0a64e3a3472361afae5`\n- `Linux 5.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}