CVE-2022-4696 (GCVE-0-2022-4696)

Vulnerability from cvelistv5 – Published: 2023-01-11 12:33 – Updated: 2024-08-03 01:48
VLAI
Summary
There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above
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 (v2.0.3)
CWE
  • CWE-763 - Release of Invalid Pointer or Reference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Kernel Affected: 5.7-rc1 , ≤ 5.10.159 (custom)
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linux linux_kernel Affected: 5.7-rc1 , ≤ 5.10.159 (custom)
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2022-12-15 05:43
Credits
Bing-Jhong Billy Jheng of Starlabs
Show details on NVD website
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      "cveMetadata": "{\"cveId\": \"CVE-2022-4696\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-03T01:48:40.470Z\", \"dateReserved\": \"2022-12-23T13:11:04.948Z\", \"assignerOrgId\": \"14ed7db2-1595-443d-9d34-6215bf890778\", \"datePublished\": \"2023-01-11T12:33:41.024Z\", \"assignerShortName\": \"Google\"}",
      "dataType": "CVE_RECORD",
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}



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Tags
Taxonomy of the tags.





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.