CVE-2024-56584 (GCVE-0-2024-56584)

Vulnerability from cvelistv5 – Published: 2024-12-27 14:50 – Updated: 2026-11-05 20:31
VLAI
Title
io_uring/tctx: work around xa_store() allocation error issue
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51 which is the WARN_ON_ONCE(!xa_empty(&tctx->xa)); sanity check in __io_uring_free() when a io_uring_task is going through its final put. The syzbot test case includes injecting memory allocation failures, and it very much looks like xa_store() can fail one of its memory allocations and end up with ->head being non-NULL even though no entries exist in the xarray. Until this issue gets sorted out, work around it by attempting to iterate entries in our xarray, and WARN_ON_ONCE() if one is found.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 20:28 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < e05c070b401f6365c503e2b59f091331965c4fb9 (git)
Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < 3a84fa784710990964c1e35df743851ab2863898 (git)
Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < 94ad56f61b873ffeebcc620d451eacfbdf9d40f0 (git)
Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < 42882b583095dcf747da6e3af1daeff40e27033e (git)
Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < d5b2ddf1f90c7248eff9630b95895c8950f2f36d (git)
Affected: 2b188cc1bb857a9d4701ae59aa7768b5124e262e , < 7eb75ce7527129d7f1fee6951566af409a37a1c4 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.10.253 , ≤ 5.10.* (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.66 , ≤ 6.6.* (semver)
Unaffected: 6.12.5 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                "value": "CWE-770"
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: io_uring/tctx: work around xa_store() allocation error issue",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-56584.json",
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  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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