Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs
Linux · Linux kernel
An integer overflow in the TCP_SKB_CB(skb)->tcp_gso_segs value affects the Linux kernel's TCP stack, specifically its handling of TCP Selective Acknowledgments (SACKs). A remote attacker with network access can trigger it without authentication or user interaction, causing a denial of service.
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.
- Exploited
- Not confirmed
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Public exploit code (PoC-in-GitHub) appeared 34 days after disclosure. No confirmed exploitation is recorded.
- Disclosedday 0
- Public exploit codePoC-in-GitHub+34 days
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.