CVE intelligence

CVE-2026-80640

Vulnerability intelligence

Published Aug 28, 2026Sources checked Oct 8, 2026

N/ACVSS not listedScore unavailable

What this means

Review the available evidence

CVE-2026-80640. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

CISA KEVNot listedBased on the latest collected catalog

EPSS0.2%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is 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]

Source: NVD