CVE-2019-11478 MEDIUM

CVE-2019-11478: SACK can cause extensive memory use via fragmented resend queue

Vendor Linux
Product Linux kernel
Weakness CWE-770 · Uncontrolled resource consumption
Published June 18, 2019
Last update September 16, 2024
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. 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 commit f070ef2ac66716357066b683fb0baf55f8191a2e.

Key dates

02Disclosure timeline

June 18, 2019 CVE published
September 16, 2024 Record updated