Vulnerability-Lookup

GSD-2023-23586

Vulnerability from gsd - Updated: 2023-12-13 01:20

Details

Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring

Aliases

CVE-2023-23586

Aliases

CVE-2023-23586

JSON

To clipboard

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      "lastModifiedDate": "2023-02-27T19:15Z",
      "publishedDate": "2023-02-17T13:15Z"
    }
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}

CVE-2023-23586 (GCVE-0-2023-23586)

Vulnerability from cvelistv5 – Published: 2023-02-17 12:25 – Updated: 2025-03-12 20:08

Title

Use after free in io_uring in the Linux Kernel

Summary

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-12 20:08 UTC

CWE

CWE-416 - Use After Free

Assigner

Google CNA under the Google root

CNA scorecard B 77/100 over 39 records in the last 180 days details

References

2 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/s…
https://kernel.dance/#788d0824269bef539fe31a785b1…

Impacted products

1 product

Vendor	Product	Version
Linux	Linux Kernel	Affected: 5.6 , ≤ 5.10.161 (custom)

Date Public

2022-12-22 14:30

Credits

Bing-Jhong Billy Jheng of Starlabs

Show details on NVD website

JSON

To clipboard

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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.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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