Description
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().
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= f984b51e0779a6dd30feedc41404013ca54e5d05, < dc1b1a057b3bb901f83433700e604fe0ae67c5f2; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 6aee2d478545c089dd5d055d3c9f0c7ea034fb80; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 4e4ab09db7899d7f2d2293a18adf0fa200a27e73; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 2df964d141270c40f07547b0c2e0a51e2573d46d; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 876014b4eeb927146430e7591cf959a7ceb8d64a; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < a20a0010eb6485f60cd64e15ebc85a4bd388642e; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 60234845142fddb27db89ebc00a65178421fb3a4; >= f984b51e0779a6dd30feedc41404013ca54e5d05, < 12b80cdbc54cf615b4717a4e8180063408091ea2 |
| Linux | Linux | 2.6.27 |
References
- https://git.kernel.org/stable/c/12b80cdbc54cf615b4717a4e8180063408091ea2
- https://git.kernel.org/stable/c/2df964d141270c40f07547b0c2e0a51e2573d46d
- https://git.kernel.org/stable/c/4e4ab09db7899d7f2d2293a18adf0fa200a27e73
- https://git.kernel.org/stable/c/60234845142fddb27db89ebc00a65178421fb3a4
- https://git.kernel.org/stable/c/6aee2d478545c089dd5d055d3c9f0c7ea034fb80
- https://git.kernel.org/stable/c/876014b4eeb927146430e7591cf959a7ceb8d64a
- https://git.kernel.org/stable/c/a20a0010eb6485f60cd64e15ebc85a4bd388642e
- https://git.kernel.org/stable/c/dc1b1a057b3bb901f83433700e604fe0ae67c5f2
Timeline
- Published
- Aug 28, 2026
- Last modified
- Nov 6, 2026
- NVD status
- Received