{"cve":{"cve_id":"CVE-2026-66485","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00132,"epss_percentile":0.03135,"epss_as_of":"2026-09-15","description":"GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial of service.\n\nThis issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9","published_at":"2026-08-10T10:25:34.337000Z","last_modified_at":"2026-08-28T15:26:19.533000Z","cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":4.6,"cvss_v4_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","cvss_v4_severity":"MEDIUM","ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-789"],"nvd_references":["https://cert.pl/en/posts/2026/08/CVE-2026-66484","https://git.savannah.gnu.org/cgit/cpio.git"],"vuln_status":"Deferred","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-08-10T11:17:49.986194Z","updated_at":"2026-08-29T00:03:34.797876Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"A","value_label":"Active"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"gnu","vendor_name":"gnu","product_slug":"cpio","product_name":"cpio","version_start":"0","version_start_inclusive":true,"version_end":"2.15","version_end_inclusive":true,"cpe23_uri":"cve5:gnu:cpio:0:2.15"}],"exploit_refs":[],"news":[],"references":[{"url":"https://cert.pl/en/posts/2026/08/CVE-2026-66484","source_type":"MISC","tags":[]},{"url":"https://git.savannah.gnu.org/cgit/cpio.git","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-08-10T10:25:34.337000Z","label":"CVE published","source":null}]}