8.8

CVE-2018-16882

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.14 < 4.14.91
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.13
Canonical ≫ Ubuntu Linux Version 14.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 16.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 18.04 SwEdition lts
Canonical ≫ Ubuntu Linux Version 18.10
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.36% 0.277
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 8.8 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
NIST 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat 6.1 0.8 4.7
CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://usn.ubuntu.com/3871-1/
Third Party Advisory
https://usn.ubuntu.com/3871-3/
Third Party Advisory
https://usn.ubuntu.com/3871-4/
Third Party Advisory
https://usn.ubuntu.com/3871-5/
Third Party Advisory
https://usn.ubuntu.com/3872-1/
Third Party Advisory
https://usn.ubuntu.com/3878-1/
Third Party Advisory
https://usn.ubuntu.com/3878-2/
Third Party Advisory
http://www.securityfocus.com/bid/106254
Third Party Advisory
VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882
Patch
Third Party Advisory
Issue Tracking
https://lwn.net/Articles/775720/
Third Party Advisory
https://lwn.net/Articles/775721/
Third Party Advisory
https://marc.info/?l=kvm&m=154514994222809&w=2
Patch
Third Party Advisory
https://support.f5.com/csp/article/K80557033
Third Party Advisory