{"id":"CVE-2026-80689","summary":"tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions\n\nmmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into\ntr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map().\nIf these functions are invoked while mmio_trace_array is NULL (e.g. before\ninitialization or after disabled), accessing tr-\u003earray_buffer.buffer will\nresult in a NULL pointer dereference crash.\n\nFix this by adding an explicit NULL check for tr at the beginning of\n__trace_mmiotrace_rw() and __trace_mmiotrace_map().","modified":"2026-10-28T02:30:24.737854981Z","published":"2026-08-28T06:52:53.724Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80689.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2df964d141270c40f07547b0c2e0a51e2573d46d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4e4ab09db7899d7f2d2293a18adf0fa200a27e73"},{"type":"WEB","url":"https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6aee2d478545c089dd5d055d3c9f0c7ea034fb80"},{"type":"WEB","url":"https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc1b1a057b3bb901f83433700e604fe0ae67c5f2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80689.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80689"},{"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":"f984b51e0779a6dd30feedc41404013ca54e5d05"},{"fixed":"dc1b1a057b3bb901f83433700e604fe0ae67c5f2"},{"fixed":"6aee2d478545c089dd5d055d3c9f0c7ea034fb80"},{"fixed":"4e4ab09db7899d7f2d2293a18adf0fa200a27e73"},{"fixed":"2df964d141270c40f07547b0c2e0a51e2573d46d"},{"fixed":"876014b4eeb927146430e7591cf959a7ceb8d64a"},{"fixed":"a20a0010eb6485f60cd64e15ebc85a4bd388642e"},{"fixed":"60234845142fddb27db89ebc00a65178421fb3a4"},{"fixed":"12b80cdbc54cf615b4717a4e8180063408091ea2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80689.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.27"},{"fixed":"5.10.270"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.221"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80689.json"}}],"schema_version":"1.9.2"}