{"id":"CVE-2026-90306","state":"PUBLISHED","title":"ARM: 9481/2: breakpoint: CFI breakpoints only on demand","description":"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 > /sys/kernel/debug/provoke-crash/DIRECT\nstill works as expected.","publishedAt":"2026-09-17T16:08:28.387Z","updatedAt":"2026-10-19T09:01:24.034Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"314f1a6762b5d51b37784ed7dc701d4c3d893703","versionType":"git"},{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"da64b150e4b7bee615b33ab21f3137c31ec36922","versionType":"git"},{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"8ed9bff906cf8036531d1559f10e82733a52b41f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"]}],"references":["https://git.kernel.org/stable/c/314f1a6762b5d51b37784ed7dc701d4c3d893703","https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922","https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90306.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90306","state":"PUBLISHED","datePublished":"2026-09-17T16:08:28.387Z","dateUpdated":"2026-10-19T09:01:24.034Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.800Z"},"containers":{"cna":{"title":"ARM: 9481/2: breakpoint: CFI breakpoints only on demand","descriptions":[{"lang":"en","value":"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 > /sys/kernel/debug/provoke-crash/DIRECT\nstill works as expected."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"314f1a6762b5d51b37784ed7dc701d4c3d893703","versionType":"git"},{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"da64b150e4b7bee615b33ab21f3137c31ec36922","versionType":"git"},{"version":"c3f89986fde7bb9ccc86a901bf28e1f7d69fc3b3","status":"affected","lessThan":"8ed9bff906cf8036531d1559f10e82733a52b41f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm/kernel/hw_breakpoint.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/314f1a6762b5d51b37784ed7dc701d4c3d893703"},{"url":"https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922"},{"url":"https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:01:24.034Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}