CVE-2018-16882
- State
- Published
- Severity
- 6.1 Medium
- Published
- Jan 3, 2019
- Updated
- Aug 5, 2024
- Reserved
- Sep 11, 2018
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.0 | 6.1 Medium | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H | redhat |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
kernel:The Linux Foundation |
|
References
- https://marc.info/?l=kvm&m=154514994222809&w=2
- USN-3872-1vendor-advisory
- USN-3878-1vendor-advisory
- USN-3871-5vendor-advisory
- USN-3878-2vendor-advisory
- USN-3871-4vendor-advisory
- 106254vdb-entry
- https://lwn.net/Articles/775720/
- USN-3871-1vendor-advisory
- https://lwn.net/Articles/775721/
- USN-3871-3vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882
- https://support.f5.com/csp/article/K80557033
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