{"id":"CVE-2026-80723","summary":"of: reserved_mem: prevent OOB when too many dynamic regions are defined","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nof: reserved_mem: prevent OOB when too many dynamic regions are defined\n\nOn boot, fdt_scan_reserved_mem() saves each dynamically-placed\n/reserved-memory subnode into a local array of size\nMAX_RESERVED_REGIONS.\n\nIf the device tree defines more than MAX_RESERVED_REGIONS\ndynamically-placed regions, fdt_scan_reserved_mem() writes past the\nend of the local array.\n\nAdd a bounds check that logs an error and skips the excess regions,\nrestoring the original behavior.","modified":"2026-08-31T03:30:21.735826297Z","published":"2026-08-28T06:53:18.485Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80723.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/68d27250c9e81ab7764603e346c2b1017cb53adf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cfa7e2734877330d6c10e0f33953905486c4530c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db3dbdfea1b8f38774419c5c2c14e4b81c48708d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de8ccbd6bf4efe7a059e2c483789936009e10f42"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80723.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80723"},{"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":"9a0fe62f93ede02c27aaca81112af1e59c8c0979"},{"fixed":"68d27250c9e81ab7764603e346c2b1017cb53adf"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"8a6e02d0c00e7b62e6acb74146878bb91e9e7e31"},{"fixed":"cfa7e2734877330d6c10e0f33953905486c4530c"},{"fixed":"de8ccbd6bf4efe7a059e2c483789936009e10f42"},{"fixed":"db3dbdfea1b8f38774419c5c2c14e4b81c48708d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.13"},{"fixed":"6.12.103"}]}],"versions":["v6.12.102","v6.12.101","v6.12.100","v6.12.99","v6.12.98","v6.12.97","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.12.69","v6.12.68","v6.12.67","v6.12.66","v6.12.65","v6.12.64","v6.12.63","v6.12.62","v6.12.61","v6.12.60","v6.12.59","v6.12.58","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.12.50","v6.12.49","v6.12.48","v6.12.47","v6.12.46","v6.12.45","v6.12.44","v6.12.43","v6.12.42","v6.12.41","v6.12.40","v6.12.39","v6.12.38","v6.12.37","v6.12.36","v6.12.35","v6.12.34","v6.12.33","v6.12.32","v6.12.31","v6.12.30","v6.12.29","v6.12.28","v6.12.27","v6.12.26","v6.12.25","v6.12.24","v6.12.23","v6.12.22","v6.12.21","v6.12.20","v6.12.19","v6.12.18","v6.12.17","v6.12.16","v6.12.15","v6.12.14","v6.12.13"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80723.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80723.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}