CVE-2026-43366 (GCVE-0-2026-43366)
Vulnerability from cvelistv5
Published
2026-05-08 14:21
Modified
2026-05-11 22:23
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: io_uring/kbuf: check if target buffer list is still legacy on recycle There's a gap between when the buffer was grabbed and when it potentially gets recycled, where if the list is empty, someone could've upgraded it to a ring provided type. This can happen if the request is forced via io-wq. The legacy recycling is missing checking if the buffer_list still exists, and if it's of the correct type. Add those checks.
References
Impacted products
Vendor Product Version
Linux Linux Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
Version: c7fb19428d67dd0a2a78a4f237af01d39c78dc5a
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{
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      "cpeApplicability": [
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      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere\u0027s a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could\u0027ve\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it\u0027s of the correct type. Add those\nchecks."
        }
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        "dateUpdated": "2026-05-11T22:23:11.847Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f"
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    "datePublished": "2026-05-08T14:21:19.191Z",
    "dateReserved": "2026-05-01T14:12:56.005Z",
    "dateUpdated": "2026-05-11T22:23:11.847Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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