CVE-2026-80689tracing/mmiotrace: Add NULL check for mmio_trace_array in logging functions
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f984b51e0779a6dd30feedc41404013ca54e5d05 before dc1b1a057b3bb901f83433700e604fe0ae67c5f2; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 6aee2d478545c089dd5d055d3c9f0c7ea034fb80; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 4e4ab09db7899d7f2d2293a18adf0fa200a27e73; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 2df964d141270c40f07547b0c2e0a51e2573d46d; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 876014b4eeb927146430e7591cf959a7ceb8d64a; from f984b51e0779a6dd30feedc41404013ca54e5d05 before a20a0010eb6485f60cd64e15ebc85a4bd388642e; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 60234845142fddb27db89ebc00a65178421fb3a4; from f984b51e0779a6dd30feedc41404013ca54e5d05 before 12b80cdbc54cf615b4717a4e8180063408091ea2 | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.