The Linux Foundation kernel:
At a glance
- Source
- NVD
- EPSS
- EPSS 0.36 % · percentile 30 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-416 — Use After Free
References
- https://marc.info/?l=kvm&m=154514994222809&w=2
- https://usn.ubuntu.com/3872-1/
- https://usn.ubuntu.com/3878-1/
- https://usn.ubuntu.com/3871-5/
- https://usn.ubuntu.com/3878-2/
- https://usn.ubuntu.com/3871-4/
- http://www.securityfocus.com/bid/106254
- https://lwn.net/Articles/775720/
- https://usn.ubuntu.com/3871-1/
- https://lwn.net/Articles/775721/
- https://usn.ubuntu.com/3871-3/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16882
- https://support.f5.com/csp/article/K80557033
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 6.1 | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H | redhat |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 6.1 | CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:H | NVD · secalert@redhat.com (Secondary) |
| CVSS 2.0 | HIGH 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2018-8672
- GCVE · GCVE-0-2018-16882
CERT-FR advisories
- CERTFR-2021-AVI-923 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-044 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2019-AVI-041 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2019-AVI-035 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.14 < 4.14.91cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.15 < 4.19.13cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| The Linux Foundation · kernel: | affected before 4.14.91 ; affected before 4.19.13 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |