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CVE-2019-11478

SACK can cause extensive memory use via fragmented resend queue

MEDIUM
5.3
CVSS Score
Published: June 18, 2019 at 11:34 PM UTC
Updated: June 17, 2026 at 02:12 AM UTC
24 products affected across 6 vendorsLinux KernelUbuntu LinuxEnterprise Linux

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Severity
MEDIUM5.3
Exploit prediction
EPSS 95%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Ubuntu Linux· Canonicalrubygems
95%
12.0414.0416.0418.0418.1019.04
Big IP Access Policy Manager· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Advanced Firewall Manager· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Analytics· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Application Acceleration Manager· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Application Security Manager· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Domain Name System· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Edge Gateway· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Fraud Protection Service· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0
Big IP Global Traffic Manager· F5
95%
11.5.2 ≤ v ≤ 11.6.412.1.0 ≤ v ≤ 12.1.413.1.0 ≤ v ≤ 13.1.114.0.0 ≤ v ≤ 14.1.015.0.0

References (29)

x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
x_refsource_MISC
Source: [email protected]
http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
x_refsource_MISC
Source: [email protected]
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
x_refsource_CONFIRM
Source: [email protected]
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2019/06/28/2
Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2019/07/06/3
Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2019/07/06/4
Mailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2019/10/24/1

CVSS

5.3MEDIUMcanonical
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770CWE-400

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