{"id":"CVE-2026-80689","title":"tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions","summary":"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 _…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < dc1b1a057b3bb901f83433700e604fe0ae67c5f2","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 6aee2d478545c089dd5d055d3c9f0c7ea034fb80","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 4e4ab09db7899d7f2d2293a18adf0fa200a27e73","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 2df964d141270c40f07547b0c2e0a51e2573d46d","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 876014b4eeb927146430e7591cf959a7ceb8d64a","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < a20a0010eb6485f60cd64e15ebc85a4bd388642e","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 60234845142fddb27db89ebc00a65178421fb3a4","Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 12b80cdbc54cf615b4717a4e8180063408091ea2","Linux 2.6.27"],"published":"2026-08-28","updated":"2026-09-14","sourceUpdated":"2026-09-14T11:58:50.409Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80689","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"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.07421,"ingestedAt":"2026-09-14T15:23:07.456Z","slug":"CVE-2026-80689","body":"## Overview\n\nIn 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().\n\n## Affected\n\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < dc1b1a057b3bb901f83433700e604fe0ae67c5f2`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 6aee2d478545c089dd5d055d3c9f0c7ea034fb80`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 4e4ab09db7899d7f2d2293a18adf0fa200a27e73`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 2df964d141270c40f07547b0c2e0a51e2573d46d`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 876014b4eeb927146430e7591cf959a7ceb8d64a`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < a20a0010eb6485f60cd64e15ebc85a4bd388642e`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 60234845142fddb27db89ebc00a65178421fb3a4`\n- `Linux >= f984b51e0779a6dd30feedc41404013ca54e5d05 < 12b80cdbc54cf615b4717a4e8180063408091ea2`\n- `Linux 2.6.27`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}