{"api_version":"1","generated_at":"2026-09-02T17:38:41+00:00","cve":"CVE-2026-80640","urls":{"html":"https://cve.report/CVE-2026-80640","api":"https://cve.report/api/cve/CVE-2026-80640.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80640","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80640"},"summary":{"title":"cxl/fwctl: Fix __fortify_panic","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/fwctl: Fix __fortify_panic\n\nFix a runtime assertion in cxlctl_get_supported_features(). Fortify\ncomplains that it is potentially overflowing the entries array per\n__counted_by_le(num_entries). Quiet the false positive by initializing\n@num_entries earlier.\n\n memcpy: detected buffer overflow: 48 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398\n RIP: 0010:__fortify_report+0x50/0xa0\n Call Trace:\n  __fortify_panic+0xd/0xf\n  cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:48","updated_at":"2026-08-28 08:16:48"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e","name":"https://git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb","name":"https://git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b","name":"https://git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80640","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80640","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d b8d15e85596ad8993d42e0703a9741961a2f03eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d 18c67ecc5dafe14055edcea53f36f4e31df1816b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4d1c09cef2c244bd19467c016a3e56ba28ecc59d 6c9d2e87df40d606f1c85143e9acb1ecff463d5e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.15","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.15 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80640","cve":"CVE-2026-80640","epss":"0.001830000","percentile":"0.079510000","score_date":"2026-08-30","updated_at":"2026-08-31 00:14:06"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/cxl/core/features.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b8d15e85596ad8993d42e0703a9741961a2f03eb","status":"affected","version":"4d1c09cef2c244bd19467c016a3e56ba28ecc59d","versionType":"git"},{"lessThan":"18c67ecc5dafe14055edcea53f36f4e31df1816b","status":"affected","version":"4d1c09cef2c244bd19467c016a3e56ba28ecc59d","versionType":"git"},{"lessThan":"6c9d2e87df40d606f1c85143e9acb1ecff463d5e","status":"affected","version":"4d1c09cef2c244bd19467c016a3e56ba28ecc59d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/cxl/core/features.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.15","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.15","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/fwctl: Fix __fortify_panic\n\nFix a runtime assertion in cxlctl_get_supported_features(). Fortify\ncomplains that it is potentially overflowing the entries array per\n__counted_by_le(num_entries). Quiet the false positive by initializing\n@num_entries earlier.\n\n memcpy: detected buffer overflow: 48 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398\n RIP: 0010:__fortify_report+0x50/0xa0\n Call Trace:\n  __fortify_panic+0xd/0xf\n  cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]"}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:52.650Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb"},{"url":"https://git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b"},{"url":"https://git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e"}],"title":"cxl/fwctl: Fix __fortify_panic","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80640","datePublished":"2026-08-28T06:48:52.650Z","dateReserved":"2026-08-26T14:34:25.778Z","dateUpdated":"2026-08-28T06:48:52.650Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:48","lastModifiedDate":"2026-08-28 08:16:48","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80640","Ordinal":"1","Title":"cxl/fwctl: Fix __fortify_panic","CVE":"CVE-2026-80640","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80640","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/fwctl: Fix __fortify_panic\n\nFix a runtime assertion in cxlctl_get_supported_features(). Fortify\ncomplains that it is potentially overflowing the entries array per\n__counted_by_le(num_entries). Quiet the false positive by initializing\n@num_entries earlier.\n\n memcpy: detected buffer overflow: 48 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398\n RIP: 0010:__fortify_report+0x50/0xa0\n Call Trace:\n  __fortify_panic+0xd/0xf\n  cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]","Type":"Description","Title":"cxl/fwctl: Fix __fortify_panic"}]}}}