CVE-2019-11477CWE-190

Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs

High · published June 18, 2019

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High probability of exploitation

CVSS calls it high at 7.5. It sits in the 99.9th percentile for exploit probability.

CVSS v3.0

7.5

EPSS

99%

Percentile

99.9

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.0: 7.5 · HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.98745 · 99.9th percentile
Weakness: CWE-190 · Integer Overflow or Wraparound
Published: 2019-06-18T23:34Z

EPSS history

Timeline

18 JUN 23:34Z
Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs
cvelistv5