CVE-2026-68176
Detail
Received This CVE record has recently been published to the CVE List and has been included within the NVD dataset.
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.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
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vector strings. CVSS information contributed by other sources is also
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CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 2.0 Severity and Vector Strings:
NVD assessment
not yet provided.
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Change History
3 change records found show changes
CVE Modified by kernel.org
8/19/2026 1:20:34 PM
Action
Type
Old Value
New Value
Added
Reference
https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc
Added
Reference
https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2
Added
Reference
https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"faaf95135184208ee3ac6f33175c8d1800669dfc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"201a01102c529772168181190cb084471082cf5c","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"8464427e1c177809a9488a97dfa2807d9dcf323b","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"724cd84b0546c07806840fa658714488553d13a2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"144f29e85702234b23d2a62abf723e6a17eb5427","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Record truncated, showing 2048 of 2477 characters.
View Entire Change Record [{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"c06470320f8156306986a831010cdc9f9f87cb50","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"0d5aaf91a3d05f7f993401af27872a5fc0f26edc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"3635a9e8b453e658a49b39d025f35bbc6e58d0e2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"faaf95135184208ee3ac6f33175c8d1800669dfc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"201a01102c529772168181190cb084471082cf5c","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"8464427e1c177809a9488a97dfa2807d9dcf323b","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"724cd84b0546c07806840fa658714488553d13a2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"144f29e85702234b23d2a62abf723e6a17eb5427","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","versionType":"semver","status":"unaffected"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","versionType":"semver","status":"unaffected"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","
CVE Modified by kernel.org
8/17/2026 1:18:19 AM
Action
Type
Old Value
New Value
Changed
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"faaf95135184208ee3ac6f33175c8d1800669dfc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"201a01102c529772168181190cb084471082cf5c","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"8464427e1c177809a9488a97dfa2807d9dcf323b","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"724cd84b0546c07806840fa658714488553d13a2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"144f29e85702234b23d2a62abf723e6a17eb5427","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc5","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"faaf95135184208ee3ac6f33175c8d1800669dfc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"201a01102c529772168181190cb084471082cf5c","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"8464427e1c177809a9488a97dfa2807d9dcf323b","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"724cd84b0546c07806840fa658714488553d13a2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"144f29e85702234b23d2a62abf723e6a17eb5427","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
New CVE Received from kernel.org
8/10/2026 9:20:04 AM
Action
Type
Old Value
New Value
Added
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.
Added
Reference
https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427
Added
Reference
https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c
Added
Reference
https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2
Added
Reference
https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b
Added
Reference
https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc
Added
Affected
[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"faaf95135184208ee3ac6f33175c8d1800669dfc","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"201a01102c529772168181190cb084471082cf5c","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"8464427e1c177809a9488a97dfa2807d9dcf323b","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"724cd84b0546c07806840fa658714488553d13a2","versionType":"git","status":"affected"},{"version":"f984b51e0779a6dd30feedc41404013ca54e5d05","lessThan":"144f29e85702234b23d2a62abf723e6a17eb5427","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["kernel/trace/trace_mmiotrace.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","versionType":"semver","status":"unaffected"},{"version":"6.6.148","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.101","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.42","lessThanOrEqual":"6.18.*","versionType":"semver","status":"unaffected"},{"version":"7.1.6","lessThanOrEqual":"7.1.*","versionType":"semver","status":"unaffected"},{"version":"7.2-rc5","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]
Quick Info
CVE Dictionary Entry: CVE-2026-68176 NVD
Published Date: 08/10/2026 NVD
Last Modified: 08/19/2026
Source: kernel.org
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