{"id":"CVE-2026-90306","summary":"ARM: 9481/2: breakpoint: CFI breakpoints only on demand","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9481/2: breakpoint: CFI breakpoints only on demand\n\nThis removes the stub hw_breakpoint_cfi_handler() from ARM, making\nit not steal breakpoint type 0x03 (ARM_ENTRY_CFI_BREAKPOINT) unless\nCFI is actively used in the kernel.\n\nWhen not instrumenting with CFI, or when a breakpoint is issued in\nuserspace, we fall through to return 1 from hw_breakpoint_pending()\n\"unhandled fault\" so userspace can make use of this breakpoint.\n\nTested with LKDTM and this command line:\necho CFI_FORWARD_PROTO \u003e /sys/kernel/debug/provoke-crash/DIRECT\nstill works as expected.","modified":"2026-09-18T03:48:37.149515830Z","published":"2026-09-17T16:08:28.387Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90306.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/22107402c2669b0163d43cc68901a2c4a59fa43a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/314f1a6762b5d51b37784ed7dc701d4c3d893703"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90306.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90306"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3"},{"fixed":"22107402c2669b0163d43cc68901a2c4a59fa43a"},{"fixed":"314f1a6762b5d51b37784ed7dc701d4c3d893703"},{"fixed":"da64b150e4b7bee615b33ab21f3137c31ec36922"},{"fixed":"8ed9bff906cf8036531d1559f10e82733a52b41f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90306.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90306.json"}}],"schema_version":"1.9.0"}