tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev
CVE-2026-68176 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-68176, released August 11, 2026. It is not reported as exploited. Patch Radar priority: Urgent.
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev If the mmio_pipe_open() fails to find a PCI device, the hiter->dev will be assigned to NULL. The mmiotrace read() function dereferences the hiter->dev if hiter exists. Change the test of the read to not only check hiter being NULL, but also the hiter->dev before dereferencing it.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 6.1.187-1 | DEBIAN-CVE-2026-68176 | Aug 11, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.101-1 | DEBIAN-CVE-2026-68176 | Aug 11, 2026 |
| linux · Debian 14 | 7.1.6-1 | DEBIAN-CVE-2026-68176 | Aug 11, 2026 |
| linux-6.12 · Debian 12.15 (bookworm) | 6.12.101-1~deb12u1 | DEBIAN-CVE-2026-68176 | Aug 11, 2026 |
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