CVE-2025-71149 (GCVE-0-2025-71149)

Vulnerability from cvelistv5 – Published: 2026-01-23 14:15 – Updated: 2026-01-23 14:15
VLAI?
Title
io_uring/poll: correctly handle io_poll_add() return value on update
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 97b388d70b53fd7d286ac1b81e5a88bd6af98209 , < 8b777ab48441b153502772ecfc78c107d4353f29 (git)
Affected: 97b388d70b53fd7d286ac1b81e5a88bd6af98209 , < 0126560370ed5217958b85657b590ad25e8b9c00 (git)
Affected: 97b388d70b53fd7d286ac1b81e5a88bd6af98209 , < c1669c03bfbc2a9b5ebff4428eecebe734c646fe (git)
Affected: 97b388d70b53fd7d286ac1b81e5a88bd6af98209 , < 13a8f7b88c2d40c6b33f6216190478dda95d385f (git)
Affected: 97b388d70b53fd7d286ac1b81e5a88bd6af98209 , < 84230ad2d2afbf0c44c32967e525c0ad92e26b4e (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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      "cpeApplicability": [
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          "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."
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        "dateUpdated": "2026-01-23T14:15:15.878Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71149",
    "datePublished": "2026-01-23T14:15:15.878Z",
    "dateReserved": "2026-01-13T15:30:19.662Z",
    "dateUpdated": "2026-01-23T14:15:15.878Z",
    "state": "PUBLISHED"
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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