PT-2019-2416 · Linux+8 · Linux Kernel+8
Jonathan Looney
·
Published
2019-05-18
·
Updated
2025-09-29
·
CVE-2019-11477
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.4.182
Linux kernel versions prior to 4.9.182
Linux kernel versions prior to 4.14.127
Linux kernel versions prior to 4.19.52
Linux kernel versions prior to 5.1.11
Description
The issue is related 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 by sending a specially crafted sequence of SACK packets. The estimated number of potentially affected devices is not specified. There is no information about real-world incidents where this issue was exploited. The vulnerability is related to the
TCP SKB CB(skb)->tcp gso segs value.Recommendations
For Linux kernel versions prior to 4.4.182, update to version 4.4.182 or later.
For Linux kernel versions prior to 4.9.182, update to version 4.9.182 or later.
For Linux kernel versions prior to 4.14.127, update to version 4.14.127 or later.
For Linux kernel versions prior to 4.19.52, update to version 4.19.52 or later.
For Linux kernel versions prior to 5.1.11, update to version 5.1.11 or later.
As a temporary workaround, consider restricting the use of TCP Selective Acknowledgments (SACKs) until a patch is available.
Exploit
Fix
DoS
Integer Overflow
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Related Identifiers
Affected Products
Alt Linux
Centos
Check Point Gaia
Huawei Vrp
Linux Kernel
Red Hat
Suse
Ubuntu
Vmware Vcenter