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CVE-2026-74602 ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

🗓️ 22 Aug 2026 15:31:50Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 32 Views

Linux kernel ring-buffer omits bpage->order init in rb_allocate_cpu_buffer() affecting page free.

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/ring_buffer.c"
    ],
    "versions": [
      {
        "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
        "lessThan": "7c620d89bae1a926ab7d626600285d3516c9f3c4",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
        "lessThan": "2e37f2bf111429fbfa4d985b12df3ba496ca70aa",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
        "lessThan": "3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f9b94daa542a8d2532f0930f01cd9aec2d19621b",
        "lessThan": "6d014e44b68ddd43f71288d2a4dbb1a259869149",
        "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/ring_buffer.c"
    ],
    "versions": [
      {
        "version": "6.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.8",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.105",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.45",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.9",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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