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
The Linux Foundation kernel: Affected: before 4.14.91
Affected: before 4.19.13
Create a notification for this product.
Date Public ?
2018-12-18 00:00
Show details on NVD website
To clipboard 

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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.