{"id":"CVE-2026-80689","state":"PUBLISHED","title":"tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions","description":"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->array_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().","publishedAt":"2026-08-28T06:52:53.724Z","updatedAt":"2026-09-14T11:58:50.409Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"dc1b1a057b3bb901f83433700e604fe0ae67c5f2","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"6aee2d478545c089dd5d055d3c9f0c7ea034fb80","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"4e4ab09db7899d7f2d2293a18adf0fa200a27e73","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"2df964d141270c40f07547b0c2e0a51e2573d46d","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"876014b4eeb927146430e7591cf959a7ceb8d64a","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"a20a0010eb6485f60cd64e15ebc85a4bd388642e","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"60234845142fddb27db89ebc00a65178421fb3a4","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"12b80cdbc54cf615b4717a4e8180063408091ea2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_mmiotrace.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_mmiotrace.c"]}],"references":["https://git.kernel.org/stable/c/dc1b1a057b3bb901f83433700e604fe0ae67c5f2","https://git.kernel.org/stable/c/6aee2d478545c089dd5d055d3c9f0c7ea034fb80","https://git.kernel.org/stable/c/4e4ab09db7899d7f2d2293a18adf0fa200a27e73","https://git.kernel.org/stable/c/2df964d141270c40f07547b0c2e0a51e2573d46d","https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a","https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e","https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4","https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80689.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80689","state":"PUBLISHED","datePublished":"2026-08-28T06:52:53.724Z","dateUpdated":"2026-09-14T11:58:50.409Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.785Z"},"containers":{"cna":{"title":"tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions","descriptions":[{"lang":"en","value":"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->array_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()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"dc1b1a057b3bb901f83433700e604fe0ae67c5f2","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"6aee2d478545c089dd5d055d3c9f0c7ea034fb80","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"4e4ab09db7899d7f2d2293a18adf0fa200a27e73","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"2df964d141270c40f07547b0c2e0a51e2573d46d","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"876014b4eeb927146430e7591cf959a7ceb8d64a","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"a20a0010eb6485f60cd64e15ebc85a4bd388642e","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"60234845142fddb27db89ebc00a65178421fb3a4","versionType":"git"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","status":"affected","lessThan":"12b80cdbc54cf615b4717a4e8180063408091ea2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_mmiotrace.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.27","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/trace/trace_mmiotrace.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/dc1b1a057b3bb901f83433700e604fe0ae67c5f2"},{"url":"https://git.kernel.org/stable/c/6aee2d478545c089dd5d055d3c9f0c7ea034fb80"},{"url":"https://git.kernel.org/stable/c/4e4ab09db7899d7f2d2293a18adf0fa200a27e73"},{"url":"https://git.kernel.org/stable/c/2df964d141270c40f07547b0c2e0a51e2573d46d"},{"url":"https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a"},{"url":"https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e"},{"url":"https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4"},{"url":"https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-09-14T11:58:50.409Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.27","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}