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CVE-2018-16882 (GCVE-0-2018-16882)

Vulnerability from cvelistv5 – Published: 2019-01-03 16:00 – Updated: 2024-08-05 10:32
VLAI
Summary
A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on(). A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system. Kernel versions before 4.14.91 and before 4.19.13 are vulnerable.
Severity
6.1 (Medium)
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H
CWE
Assigner
References
URL Tags
https://marc.info/?l=kvm&m=154514994222809&w=2 x_refsource_MISC
https://usn.ubuntu.com/3872-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3878-1/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3871-5/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3878-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3871-4/ vendor-advisoryx_refsource_UBUNTU
http://www.securityfocus.com/bid/106254 vdb-entryx_refsource_BID
https://lwn.net/Articles/775720/ x_refsource_CONFIRM
https://usn.ubuntu.com/3871-1/ vendor-advisoryx_refsource_UBUNTU
https://lwn.net/Articles/775721/ x_refsource_CONFIRM
https://usn.ubuntu.com/3871-3/ vendor-advisoryx_refsource_UBUNTU
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://support.f5.com/csp/article/K80557033 x_refsource_CONFIRM
Impacted products
Vendor Product Version CPE status
The Linux Foundation kernel: Affected: before 4.14.91
Affected: before 4.19.13
guessed Create a notification for this product.
Date Public
2018-12-18 00:00
Show details on NVD website
To clipboard 

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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Kernel: KVM: nVMX: use after free in posted interrupt processing",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-16882.json",
      "version": "3"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.