CVE-2026-68176 (GCVE-0-2026-68176)
Vulnerability from cvelistv5
Published
2026-08-10 11:59
Modified
2026-08-19 16:30
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 Version: f984b51e0779a6dd30feedc41404013ca54e5d05 |
||
{
"containers": {
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"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.27"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
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},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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}
],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix mmiotrace possible NULL dereferencing of hiter-\u003edev\n\nIf the mmio_pipe_open() fails to find a PCI device, the hiter-\u003edev\nwill be assigned to NULL. The mmiotrace read() function dereferences the\nhiter-\u003edev if hiter exists.\n\nChange the test of the read to not only check hiter being NULL, but also\nthe hiter-\u003edev before dereferencing it."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:30:41.982Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50"
},
{
"url": "https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc"
},
{
"url": "https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2"
},
{
"url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"
},
{
"url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"
},
{
"url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"
},
{
"url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"
},
{
"url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"
}
],
"title": "tracing: Fix mmiotrace possible NULL dereferencing of hiter-\u003edev",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68176",
"datePublished": "2026-08-10T11:59:47.298Z",
"dateReserved": "2026-07-30T09:28:09.372Z",
"dateUpdated": "2026-08-19T16:30:41.982Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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