cxl/fwctl: Fix __fortify_panic
Summary
| CVE | CVE-2026-80640 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-28 08:16:48 UTC |
| Updated | 2026-08-28 08:16:48 UTC |
| 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] |
Risk And Classification
EPSS: 0.001830000 probability, percentile 0.079510000 (date 2026-08-30)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d b8d15e85596ad8993d42e0703a9741961a2f03eb git | Not specified |
| CNA | Linux | Linux | affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d 18c67ecc5dafe14055edcea53f36f4e31df1816b git | Not specified |
| CNA | Linux | Linux | affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d 6c9d2e87df40d606f1c85143e9acb1ecff463d5e git | Not specified |
| CNA | Linux | Linux | affected 6.15 | Not specified |
| CNA | Linux | Linux | unaffected 6.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.