# CVE-2026-80640: linux: In the Linux kernel, the following vulnerability has been resolved:  cxl/fwctl: Fix __fortify_panic  Fix a runtime as...

CVE-2026-80640 is fixed in linux on 1 platform by DEBIAN-CVE-2026-80640 (version 7.1.5-1), released August 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-80640
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 28, 2026

## Description

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]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-80640](https://patchblox.com/security/data/fix/linux/debian-cve-2026-80640.md) | Aug 29, 2026 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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