CVE-2019-11477
7.5
HIGH
CVSS 3.1
EPSS 98.7%
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.
How to fix CVE-2019-11477
To remediate CVE-2019-11477, upgrade the affected package to a fixed version below.
- —upgrade to 4.19.37-4 or later
Is CVE-2019-11477 being exploited?
Likely — EPSS is 98.7%, placing CVE-2019-11477 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- from 0, < 4.19.37-4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |