What is CVE-2019-19338?

CVE-2019-19338 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2019-19338 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2019-19338?

CVE-2019-19338 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2019-19338?

No patch is currently available for CVE-2019-19338. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2019-19338 actively exploited?

CVE-2019-19338 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2019-19338

Medium

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.

Package Linux Kernel

Published 2020-07-13

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness type

CWE-203

CVE-2019-19338 is classified as CWE-203

See CWE-203 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2019-19338 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Software
https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort

Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338
Patch
Kernel patch commit
https://www.openwall.com/lists/oss-security/2019/12/10/3
Patch

Details

CVE ID CVE-2019-19338

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2020-07-13

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2019-19338?

CVE-2019-19338 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2019-19338 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2019-19338?

CVE-2019-19338 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2019-19338?

No patch is currently available for CVE-2019-19338. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2019-19338 actively exploited?

No — CVE-2019-19338 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.