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[Sophos Advisory]: TCP SACK PANIC kernel vulnerability

Hi everyone,

Three related flaws were found in the Linux kernel’s handling of TCP Selective Acknowledgement (SACK) packets handling with low MSS size. These have been assigned the following CVEs: CVE-2019-11477 is considered an Important severity while CVE-2019-11478 and CVE-2019-11479 are considered a Moderate severity.

The following article outlines the details of the TCP SACK PANIC and how it impacts Sophos products.

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  • I see UTM v9.603 is mentioned in the KB Advisory Article for these CVE's, with v9.604 being release mid July to fix it.


    Is there a specific SFOS version or versions affected by this for XG appliances?