CVE-2026-68176 (GCVE-0-2026-68176)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30
VLAI
Title
tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < c06470320f8156306986a831010cdc9f9f87cb50 (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 0d5aaf91a3d05f7f993401af27872a5fc0f26edc (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 3635a9e8b453e658a49b39d025f35bbc6e58d0e2 (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < faaf95135184208ee3ac6f33175c8d1800669dfc (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 201a01102c529772168181190cb084471082cf5c (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 8464427e1c177809a9488a97dfa2807d9dcf323b (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 724cd84b0546c07806840fa658714488553d13a2 (git)
Affected: f984b51e0779a6dd30feedc41404013ca54e5d05 , < 144f29e85702234b23d2a62abf723e6a17eb5427 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.27
Unaffected: 0 , < 2.6.27 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
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          "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."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:30:41.982Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "datePublished": "2026-08-10T11:59:47.298Z",
    "dateReserved": "2026-07-30T09:28:09.372Z",
    "dateUpdated": "2026-08-19T16:30:41.982Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-13T22:53:35+00:00",
      "cve": "CVE-2026-68176",
      "id": "CVE-2026-68176",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "275",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing: Fix mmiotrace possible NULL dereferencing of hiter-\u003edev",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68176.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-13T16:23:36Z",
      "cve": "CVE-2026-68176",
      "id": "CVE-2026-68176",
      "initial_release_date": "2026-08-13T16:23:36Z",
      "product_status:known_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68176",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68176.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.