What is CVE-2019-18805?

CVE-2019-18805 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Integer Overflow flaw (CWE-190). CVE-2019-18805 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2019-18805?

CVE-2019-18805 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2019-18805?

No patch is currently available for CVE-2019-18805. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2019-18805 actively exploited?

CVE-2019-18805 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/190.html

CVE-2019-18805

Critical

An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.

Package Linux Kernel

Published 2019-11-07

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-190

CVE-2019-18805 is a Integer Overflow vulnerability

What is Integer Overflow?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2019-18805 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/2019-11/msg00035.html

Mailing List Third Party Advisory
Lists
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html

Mailing List Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2020:0740

Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20191205-0001/

Third Party Advisory
Kernel patch commit
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19fad20d15a6494f47f85d869f00b11343ee5c78
Patch

Details

CVE ID CVE-2019-18805

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2019-11-07

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2019-18805?

CVE-2019-18805 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as an Integer Overflow flaw (CWE-190) . CVE-2019-18805 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2019-18805?

CVE-2019-18805 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2019-18805?

No patch is currently available for CVE-2019-18805. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2019-18805 actively exploited?

No — CVE-2019-18805 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. View CWE-190 on MITRE CWE →