CVE-2026-46065 (GCVE-0-2026-46065)
Vulnerability from cvelistv5
Published
2026-05-27 12:57
Modified
2026-10-19 19:26
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal. Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.
References
Impacted products
Vendor Product Version
Linux Linux Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
Version: 60b59beafba875aef6d378078bce0baf2287ae14
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Allocate an\\ninstance as part of initializing deferred I/O and remove it only after\\nthe final mapping has been closed. If the fb_info and the contained\\ndeferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info\\nto invalidate the mapping. Any access will then result in a SIGBUS\\nsignal.\\n\\nFixes a long-standing problem, where a device hot-unplug happens while\\nuser space still has an active mapping of the graphics memory. The hot-\\nunplug frees the instance of struct fb_info. Accessing the memory will\\noperate on undefined state.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.210\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.176\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.140\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.88\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.30\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0.4\", \"versionStartIncluding\": \"2.6.22\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1\", \"versionStartIncluding\": \"2.6.22\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:29:27.785Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-46065\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T19:26:42.635Z\", \"dateReserved\": \"2026-05-13T15:03:33.095Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-05-27T12:57:32.968Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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