FKIE_CVE-2025-71149

Vulnerability from fkie_nvd - Published: 2026-01-23 15:16 - Updated: 2026-01-26 15:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/poll: correctly handle io_poll_add() return value on update When the core of io_uring was updated to handle completions consistently and with fixed return codes, the POLL_REMOVE opcode with updates got slightly broken. If a POLL_ADD is pending and then POLL_REMOVE is used to update the events of that request, if that update causes the POLL_ADD to now trigger, then that completion is lost and a CQE is never posted. Additionally, ensure that if an update does cause an existing POLL_ADD to complete, that the completion value isn't always overwritten with -ECANCELED. For that case, whatever io_poll_add() set the value to should just be retained.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0126560370ed5217958b85657b590ad25e8b9c00
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13a8f7b88c2d40c6b33f6216190478dda95d385f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/84230ad2d2afbf0c44c32967e525c0ad92e26b4e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b777ab48441b153502772ecfc78c107d4353f29
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1669c03bfbc2a9b5ebff4428eecebe734c646fe
Impacted products
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: correctly handle io_poll_add() return value on update\n\nWhen the core of io_uring was updated to handle completions\nconsistently and with fixed return codes, the POLL_REMOVE opcode\nwith updates got slightly broken. If a POLL_ADD is pending and\nthen POLL_REMOVE is used to update the events of that request, if that\nupdate causes the POLL_ADD to now trigger, then that completion is lost\nand a CQE is never posted.\n\nAdditionally, ensure that if an update does cause an existing POLL_ADD\nto complete, that the completion value isn\u0027t always overwritten with\n-ECANCELED. For that case, whatever io_poll_add() set the value to\nshould just be retained."
    }
  ],
  "id": "CVE-2025-71149",
  "lastModified": "2026-01-26T15:03:51.687",
  "metrics": {},
  "published": "2026-01-23T15:16:05.630",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0126560370ed5217958b85657b590ad25e8b9c00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/13a8f7b88c2d40c6b33f6216190478dda95d385f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/84230ad2d2afbf0c44c32967e525c0ad92e26b4e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b777ab48441b153502772ecfc78c107d4353f29"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c1669c03bfbc2a9b5ebff4428eecebe734c646fe"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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