CVE-2019-19338
At a glance
- Severity
- MEDIUM 5.5
- EPSS
- EPSS 0.47 % · percentile 41 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Modified
Description
A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | redhat |
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | NVD · secalert@redhat.com (Secondary) |
| CVSS 2.0 | LOW 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N | NVD · nvd@nist.gov (Primary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2019-8959
- GCVE · GCVE-0-2019-19338
CERT-FR advisories
- CERTFR-2022-AVI-267 — Multiples vulnérabilités dans Juniper Networks Junos Space · cert.ssi.gouv.fr
- CERTFR-2020-AVI-210 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2020-AVI-157 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2020-AVI-148 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2020-AVI-130 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2020-AVI-124 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2020-AVI-119 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2020-AVI-071 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2020-AVI-029 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-655 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-653 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2019-AVI-639 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 5.5cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| [UNKNOWN] · Linux Kernel | affected before 5.5 |
References
- https://www.openwall.com/lists/oss-security/2019/12/10/3
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338
- https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort
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 |