CVE-2019-11477
Published:June 18, 2019
Updated:May 16, 2026
Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). 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 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.
Affected Packages
linux-zen (ARCHLINUX):
Affected version(s) =5.1.10.zen1-1 <5.1.11.zen1-1Fix Suggestion:
Update to version 5.1.11.zen1-1linux-lts (ARCHLINUX):
Affected version(s) =4.19.51-1 <4.19.51-2Fix Suggestion:
Update to version 4.19.51-2linux-hardened (ARCHLINUX):
Affected version(s) =5.1.10.a-1 <5.1.10.a-2Fix Suggestion:
Update to version 5.1.10.a-2linux (ARCHLINUX):
Affected version(s) =5.1.10.arch1-1 <5.1.11.arch1-1Fix Suggestion:
Update to version 5.1.11.arch1-1linux-yocto (YOCTO):
Affected version(s) >=4.8 <4.8.24+gitAUTOINC+c84532b647_f6329fd287Fix Suggestion:
Update to version 4.8.24+gitAUTOINC+c84532b647_f6329fd287Related Resources (30)
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Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Integer Overflow or Wraparound
EPSS
Base Score:
69.92