{"id":"CVE-2026-80723","title":"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 …","summary":"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 …","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:08.920","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80723","references":[{"url":"https://git.kernel.org/stable/c/68d27250c9e81ab7764603e346c2b1017cb53adf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cfa7e2734877330d6c10e0f33953905486c4530c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/db3dbdfea1b8f38774419c5c2c14e4b81c48708d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de8ccbd6bf4efe7a059e2c483789936009e10f42","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80723.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80723"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525407"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80723"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80723"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082811-CVE-2026-80723-2526@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00132,"epssPercentile":0.02777,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:21:00.622788Z"},"scores":{"nvd":8.4,"vendor":5.5,"cna":8.4},"ingestedAt":"2026-10-16T19:46:24.302Z","slug":"CVE-2026-80723","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80723.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230437,"id":"CVE-2026-80723","ts":1793134644173,"field":"cvss","old":"5.5","new":"8.4"},{"seq":230436,"id":"CVE-2026-80723","ts":1793134644173,"field":"severity","old":"medium","new":"high"},{"seq":224348,"id":"CVE-2026-80723","ts":1792325101590,"field":"cvss","old":"8.4","new":"5.5"},{"seq":224347,"id":"CVE-2026-80723","ts":1792325101590,"field":"severity","old":"high","new":"medium"}]}