CVE-2026-46315 (GCVE-0-2026-46315)

Vulnerability from cvelistv5 – Published: 2026-06-09 07:38 – Updated: 2026-06-14 18:08
VLAI
Title
io_uring/waitid: clear waitid info before copying it to userspace
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/waitid: clear waitid info before copying it to userspace IORING_OP_WAITID stores its result fields in struct io_waitid::info and later copies them to userspace siginfo. The prep path initializes the request arguments, but it does not initialize info itself. If the wait operation completes without reporting a child event, the common wait code can return without writing wo_info. In that case io_waitid_finish() still copies iw->info to userspace, exposing stale bytes from the reused io_kiocb command storage. Clear the result storage during prep so the io_uring path matches the regular waitid syscall, which uses a zero-initialized struct waitid_info.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f31ecf671ddc498f20219453395794ff2383e06b , < 954518e5a4a5efc5033253f6e36fc7b9f98363a3 (git)
Affected: f31ecf671ddc498f20219453395794ff2383e06b , < b737c6612c60c23b40a9f31749b99e6f61943847 (git)
Affected: f31ecf671ddc498f20219453395794ff2383e06b , < 4d2a0de611ab60d02fc768ae0cd5918b16bd5474 (git)
Affected: f31ecf671ddc498f20219453395794ff2383e06b , < 93d93f5f8da791e98159795c6ef683f45bd95d13 (git)
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Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-08T15:08:30+00:00",
      "cve": "CVE-2026-46315",
      "id": "CVE-2026-46315",
      "initial_release_date": "2026-06-09T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
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      "title": "kernel: io_uring/waitid: clear waitid info before copying it to userspace",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46315.json",
      "version": "3"
    },
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:07:16Z",
      "cve": "CVE-2026-46315",
      "id": "CVE-2026-46315",
      "initial_release_date": "2026-06-10T02:25:57Z",
      "product_status:known_affected": "17",
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      "product_status:recommended": "102",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46315",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46315.json",
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}



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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.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.


Detection rules are retrieved from Rulezet.