CVE-2026-80640

In the Linux kernel, the following vulnerability has been resolved: cxl/fwctl: Fix __fortify_panic Fix a runtime assertion in cxlctl_get_supported_features(). Fortify complains that it is potentially overflowing the entries array per __counted_by_le(num_entries). Quiet the false positive by initializing @num_entries earlier. memcpy: detected buffer overflow: 48 byte write of buffer size 0 WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398 RIP: 0010:__fortify_report+0x50/0xa0 Call Trace: __fortify_panic+0xd/0xf cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]

• https://git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b
• https://git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e
• https://git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb

Published

Aug 28, 2026

Last Modified

Aug 28, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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