CVE-2026-68176

tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev

N/A

Published: August 10, 2026 at 11:59 AM UTC

Updated: August 19, 2026 at 05:20 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.27 ≤ v < 5.10.2652.6.27 ≤ v < 5.15.2162.6.27 ≤ v < 6.1.1832.6.27 ≤ v < 6.12.1012.6.27 ≤ v < 6.18.422.6.27 ≤ v < 6.6.1482.6.27 ≤ v < 7.1.62.6.27 ≤ v < 7.22.6.27f984b51e0779a6dd30feedc41404013ca54e5d05

Vendor states this is fixed in 0d5aaf91a3d05f7f993401af27872a5fc0f26edc (fixed)

Vendor states this is fixed in 144f29e85702234b23d2a62abf723e6a17eb5427 (fixed)

Vendor states this is fixed in 201a01102c529772168181190cb084471082cf5c (fixed)

Vendor states this is fixed in 3635a9e8b453e658a49b39d025f35bbc6e58d0e2 (fixed)

Vendor states this is fixed in 724cd84b0546c07806840fa658714488553d13a2 (fixed)

Vendor states this is fixed in 8464427e1c177809a9488a97dfa2807d9dcf323b (fixed)

Vendor states this is fixed in c06470320f8156306986a831010cdc9f9f87cb50 (fixed)

Vendor states this is fixed in faaf95135184208ee3ac6f33175c8d1800669dfc (fixed)

Vendor states this is fixed in 2.6.27 (unaffected)

Vendor states this is fixed in 5.10.265 (unaffected)

Vendor states this is fixed in 5.15.216 (unaffected)

Vendor states this is fixed in 6.1.183 (unaffected)