CVE-2026-90306
- Source
- https://cve.org/CVERecord?id=CVE-2026-90306
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-90306.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-90306
- Downstream
- Related
- Published
- 2026-09-17T16:08:28Z
- Modified
- 2026-09-25T18:26:53Z
- Summary
- ARM: 9481/2: breakpoint: CFI breakpoints only on demand
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ARM: 9481/2: breakpoint: CFI breakpoints only on demand
This removes the stub hw_breakpoint_cfi_handler() from ARM, making it not steal breakpoint type 0x03 (ARM_ENTRY_CFI_BREAKPOINT) unless CFI is actively used in the kernel.
When not instrumenting with CFI, or when a breakpoint is issued in userspace, we fall through to return 1 from hw_breakpoint_pending() "unhandled fault" so userspace can make use of this breakpoint.
Tested with LKDTM and this command line: echo CFI_FORWARD_PROTO > /sys/kernel/debug/provoke-crash/DIRECT still works as expected.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90306.json" }- References
-
- https://git.kernel.org/stable/c/314f1a6762b5d51b37784ed7dc701d4c3d893703
- https://git.kernel.org/stable/c/8ed9bff906cf8036531d1559f10e82733a52b41f
- https://git.kernel.org/stable/c/da64b150e4b7bee615b33ab21f3137c31ec36922
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90306.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-90306
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git