FKIE_CVE-2026-68176

Vulnerability from fkie_nvd - Published: 2026-08-10 13:20 - Updated: 2026-08-19 17:20
Severity
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace_mmiotrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c06470320f8156306986a831010cdc9f9f87cb50",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "0d5aaf91a3d05f7f993401af27872a5fc0f26edc",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "3635a9e8b453e658a49b39d025f35bbc6e58d0e2",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "faaf95135184208ee3ac6f33175c8d1800669dfc",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "201a01102c529772168181190cb084471082cf5c",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "8464427e1c177809a9488a97dfa2807d9dcf323b",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "724cd84b0546c07806840fa658714488553d13a2",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            },
            {
              "lessThan": "144f29e85702234b23d2a62abf723e6a17eb5427",
              "status": "affected",
              "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/trace_mmiotrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "lessThan": "2.6.27",
              "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",
              "versionType": "semver"
            },
            {
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-68176",
  "lastModified": "2026-08-19T17:20:34.080",
  "metrics": {},
  "published": "2026-08-10T13:20:04.490",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d5aaf91a3d05f7f993401af27872a5fc0f26edc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/144f29e85702234b23d2a62abf723e6a17eb5427"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/201a01102c529772168181190cb084471082cf5c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3635a9e8b453e658a49b39d025f35bbc6e58d0e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/724cd84b0546c07806840fa658714488553d13a2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8464427e1c177809a9488a97dfa2807d9dcf323b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c06470320f8156306986a831010cdc9f9f87cb50"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/faaf95135184208ee3ac6f33175c8d1800669dfc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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