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GHSA-GHXJ-PHM3-49FW

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68176"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:04Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-ghxj-phm3-49fw",
  "modified": "2026-08-19T18:32:08Z",
  "published": "2026-08-10T15:33:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68176"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30

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

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c06470320f8156306…
https://git.kernel.org/stable/c/0d5aaf91a3d05f7f9…
https://git.kernel.org/stable/c/3635a9e8b453e658a…
https://git.kernel.org/stable/c/faaf95135184208ee…
https://git.kernel.org/stable/c/201a01102c5297721…
https://git.kernel.org/stable/c/8464427e1c177809a…
https://git.kernel.org/stable/c/724cd84b0546c0780…
https://git.kernel.org/stable/c/144f29e85702234b2…

Impacted products

2 products

Vendor	Product	Version
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)
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)

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              "status": "unaffected",
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        }
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    "dateReserved": "2026-07-30T09:28:09.372Z",
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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-GHXJ-PHM3-49FW

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

Tags

Sightings

Nomenclature