CVE-2026-80689

Summary

In the Linux kernel, the following vulnerability has been resolved:

tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions

mmio_trace_rw() and mmio_trace_mapping() retrieve mmio_trace_array into tr and pass it to __trace_mmiotrace_rw() and __trace_mmiotrace_map(). If these functions are invoked while mmio_trace_array is NULL (e.g. before initialization or after disabled), accessing tr->array_buffer.buffer will result in a NULL pointer dereference crash.

Fix this by adding an explicit NULL check for tr at the beginning of __trace_mmiotrace_rw() and __trace_mmiotrace_map().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < dc1b1a057b3bb901f83433700e604fe0ae67c5f2affected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 6aee2d478545c089dd5d055d3c9f0c7ea034fb80affected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 4e4ab09db7899d7f2d2293a18adf0fa200a27e73affected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 2df964d141270c40f07547b0c2e0a51e2573d46daffected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 876014b4eeb927146430e7591cf959a7ceb8d64aaffected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < a20a0010eb6485f60cd64e15ebc85a4bd388642eaffected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 60234845142fddb27db89ebc00a65178421fb3a4affected
LinuxLinuxf984b51e0779a6dd30feedc41404013ca54e5d05 < 12b80cdbc54cf615b4717a4e8180063408091ea2affected
LinuxLinux2.6.27affected
LinuxLinux0 < 2.6.27unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References