Anthropic's unreleased Claude AI finds critical Linux kernel flaw CVE-2026-98432
Anthropic says an unreleased version of its Claude AI model discovered a critical Linux kernel vulnerability, tracked as CVE-2026-98432, with a severity score of 9.8 out of 10. The flaw is a use-after-free memory error in the networking code that handles Multipath TCP (MPTCP) connections. Anthropic demonstrated a proof-of-concept exploit that achieves root access in about 53 minutes by leaking…
Key points
- Unreleased Claude AI found CVE-2026-98432, a 9.8 severity Linux kernel use-after-free flaw
- Proof-of-concept exploit gains root access in ~53 minutes without user interaction
- Eight kernel branches back to v4.4 affected; patches out for some distros, not Ubuntu or RHEL yet
The vulnerability affects eight Linux kernel branches dating back to version 4.4. Fixed versions include 5.10.272, 5.15.223, 6.6.159, 6.1.190, 6.12.113, 6.18.56, 7.2.10, and 7.3-rc7. Debian, Oracle Linux, SUSE, and Amazon Linux have released patched packages for some versions. Ubuntu and Red Hat Enterprise Linux had not shipped fixes at the time of writing. Administrators are advised to check kernel versions, apply updates when available, and verify whether MPTCP listeners are enabled on their servers.
Anthropic's Claude AI found a critical Linux flaw that could give hackers root access
tech.yahoo.com · 30 October 2026
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