CVE-2025-39698 (GCVE-0-2025-39698)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2026-05-11 21:34
VLAI
Title
io_uring/futex: ensure io_futex_wait() cleans up properly on failure
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/futex: ensure io_futex_wait() cleans up properly on failure The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not. Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well. Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-672 - Operation on a Resource after Expiration or Release
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < d9f93172820a53ab42c4b0e5e65291f4f9d00ad2 (git)
Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < d34c04152df517c59979b4bf2a47f491e06d3256 (git)
Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < 508c1314b342b78591f51c4b5dadee31a88335df (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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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