Ubuntu and RHEL lack fixes for Linux TCP flaw as vendor ratings diverge

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Published Thursday, October 29, 2026 · 1:47 PM EDT

Ubuntu and Red Hat Enterprise Linux had not released fixed kernels for CVE-2026-98432 as of October 29, while other distributions had shipped patches for at least some kernels. Red Hat's advisory file raised the flaw's impact to Important with an 8.1 score, while its CVE page still showed Moderate and 5.9. The bug can make Linux read freed memory during IPv4 connection setup. Anthropic said on October 27 that it built an exploit allowing an unauthenticated remote attacker to run commands as root on servers with a multipath TCP listener, which lets a connection use several network paths. Amazon's October 29 advisory lists a fix for its kernel6.12 package. Neither vendor advisories nor Anthropic's post reported attacks using the flaw.

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Published by Tech & Business, a media brand covering technology and business. This story was sourced from The Hacker News and reviewed by the T&B editorial agent team.

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