CVE-2023-0240 (GCVE-0-2023-0240)

Vulnerability from cvelistv5 – Published: 2023-01-30 13:17 – Updated: 2024-08-02 05:02
VLAI
Title
Use after free in io_uring in the Linux Kernel
Summary
There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-08-01 18:22 UTC
CWE
Assigner
Google CNA under the Google root
CNA scorecard B 77/100 over 40 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Kernel Affected: 5.10 , ≤ 5.10.161 (custom)
guessed Create a notification for this product.
linux linux_kernel Affected: 5.10 , ≤ 5.10.161 (custom)
    cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:*
Create a notification for this product.
Date Public
2022-12-22 14:30
Credits
Bing-Jhong Billy Jheng of Starlabs
Show details on NVD website
To clipboard 

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      "title": "SUSE CVE CVE-2023-0240",
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                "url": "https://security.netapp.com/advisory/ntap-20230316-0001/"
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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.
  • 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.
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Vulnerability timeline

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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