CVE-2019-11479 - CVE House

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Status published Medium CVE-2019-11479

Jonathan Looney discovered that the Linux kernel default MSS is...

5.3 CVSS

Vulnerability Description

Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Jonathan Looney from Netflix

References

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fs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()

fs/ntfs3: Initialize new folios before use

Affected Vendor

Linux

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Affected Software

Linux kernel

Vulnerable Versions:

4.4, 4.9, 4.14, 4.19, 5.1

Timeline

Official Publish: June 18th, 2019

Last Modified: September 16th, 2024

Added to House: July 20th, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.