What is CVE-2018-20976?

CVE-2018-20976 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2018-20976 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2018-20976?

CVE-2018-20976 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2018-20976?

No patch is currently available for CVE-2018-20976. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2018-20976 actively exploited?

CVE-2018-20976 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2018-20976

High

An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.

Package Linux Kernel

Published 2019-08-19

Last modified 2024-11-21

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2018-20976 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2018-20976 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lists
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html
Lists
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html
Packet Storm
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
Packet Storm
http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
Red Hat
https://access.redhat.com/errata/RHSA-2020:0178
Red Hat
https://access.redhat.com/errata/RHSA-2020:0543
Red Hat
https://access.redhat.com/errata/RHSA-2020:0592
Red Hat
https://access.redhat.com/errata/RHSA-2020:0609
Red Hat
https://access.redhat.com/errata/RHSA-2020:0661
Debian Security
https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html
Debian Security
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
Seclists
https://seclists.org/bugtraq/2019/Nov/11
Security
https://security.netapp.com/advisory/ntap-20190905-0002/
Support
https://support.f5.com/csp/article/K10269585?utm_source=f5support&amp%3Butm_medium=RSS
Ubuntu Security
https://usn.ubuntu.com/4144-1/
Ubuntu Security
https://usn.ubuntu.com/4145-1/
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c9fbd7bbc23dbdd73364be4d045e5d3612cf6e82
Patch

Details

CVE ID CVE-2018-20976

Severity High

CVSS score 7.8 / 10

CVSS version 3.0

Published 2019-08-19

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2018-20976?

CVE-2018-20976 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2018-20976 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2018-20976?

CVE-2018-20976 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2018-20976?

No patch is currently available for CVE-2018-20976. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2018-20976 actively exploited?

No — CVE-2018-20976 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →