CVE-2026-80689
N/A
N/A
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | f984b51e0779a6dd30feedc41404013ca54e5d05 < 876014b4eeb927146430e7591cf959a7ceb8d64a | affected |
| Linux | Linux | f984b51e0779a6dd30feedc41404013ca54e5d05 < a20a0010eb6485f60cd64e15ebc85a4bd388642e | affected |
| Linux | Linux | f984b51e0779a6dd30feedc41404013ca54e5d05 < 60234845142fddb27db89ebc00a65178421fb3a4 | affected |
| Linux | Linux | f984b51e0779a6dd30feedc41404013ca54e5d05 < 12b80cdbc54cf615b4717a4e8180063408091ea2 | affected |
| Linux | Linux | 2.6.27 | affected |
| Linux | Linux | 0 < 2.6.27 | unaffected |
| Linux | Linux | 6.12.103 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.44 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.8 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- 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
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