title: Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs
description: 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.
problem types: CWE-190 Integer Overflow or Wraparound
affected:
{
product: Linux kernel
vendor: Linux
versions:
lessThan: 4.4.182, status: affected, version: 4.4, versionType: custom
lessThan: 4.9.182, status: affected, version: 4.9, versionType: custom
lessThan: 4.14.127, status: affected, version: 4.14, versionType: custom
lessThan: 4.19.52, status: affected, version: 4.19, versionType: custom
lessThan: 5.1.11, status: affected, version: 5.1, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 7.5
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.0
]