7.5
High
CVE-2019-11477 Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Kernel 5.1 | 5.1 → < 5.1.11 | 5.1.11 |
| Linux Kernel 4.19 | 4.19 → < 4.19.52 | 4.19.52 |
| Linux Kernel 4.14 | 4.14 → < 4.14.127 | 4.14.127 |
| Linux Kernel 4.9 | 4.9 → < 4.9.182 | 4.9.182 |
| Linux Kernel 4.4 | 4.4 → < 4.4.182 | 4.4.182 |
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