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CVE-2026-68176 tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev

🗓️ 10 Aug 2026 11:59:47Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 35 Views

Fix mmiotrace NULL dereference of hiter->dev when mmio_pipe_open fails to find a PCI device; read() now checks hiter->dev.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/trace/trace_mmiotrace.c"
    ],
    "versions": [
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "c06470320f8156306986a831010cdc9f9f87cb50",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "0d5aaf91a3d05f7f993401af27872a5fc0f26edc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "3635a9e8b453e658a49b39d025f35bbc6e58d0e2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "faaf95135184208ee3ac6f33175c8d1800669dfc",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "201a01102c529772168181190cb084471082cf5c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "8464427e1c177809a9488a97dfa2807d9dcf323b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "724cd84b0546c07806840fa658714488553d13a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f984b51e0779a6dd30feedc41404013ca54e5d05",
        "lessThan": "144f29e85702234b23d2a62abf723e6a17eb5427",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/trace/trace_mmiotrace.c"
    ],
    "versions": [
      {
        "version": "2.6.27",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.27",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.265",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.216",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.183",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.148",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.101",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.42",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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19 Aug 2026 16:30Current
EPSS0.0021
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