{"cve":{"cve_id":"CVE-2024-56406","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":0.00536,"epss_percentile":0.43878,"epss_as_of":"2026-10-15","description":"A heap buffer overflow vulnerability was discovered in Perl. \n\nRelease branches 5.34, 5.36, 5.38 and 5.40 are affected, including development versions from 5.33.1 through 5.41.10.\n\nWhen there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.\n\n   $ perl -e '$_ = \"\\x{FF}\" x 1000000; tr/\\xFF/\\x{100}/;' \n   Segmentation fault (core dumped)\n\nIt is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.","published_at":"2025-04-13T13:16:09.841000Z","last_modified_at":null,"cvss_v3_score":8.4,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-122","CWE-787"],"nvd_references":["https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch","https://metacpan.org/release/SHAY/perl-5.38.4/changes","https://metacpan.org/release/SHAY/perl-5.40.2/changes"],"vuln_status":null,"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-29T02:17:18.614695Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"perl","vendor_name":"perl","product_slug":"perl","product_name":"perl","version_start":"5.41.0","version_start_inclusive":true,"version_end":"5.41.10","version_end_inclusive":true,"cpe23_uri":"cve5:perl:perl:5.41.0:5.41.10"},{"vendor_slug":"perl","vendor_name":"perl","product_slug":"perl","product_name":"perl","version_start":"5.39.0","version_start_inclusive":true,"version_end":"5.40.2-RC1","version_end_inclusive":false,"cpe23_uri":"cve5:perl:perl:5.39.0:5.40.2-RC1"},{"vendor_slug":"perl","vendor_name":"perl","product_slug":"perl","product_name":"perl","version_start":"5.33.1","version_start_inclusive":true,"version_end":"5.38.4-RC1","version_end_inclusive":false,"cpe23_uri":"cve5:perl:perl:5.33.1:5.38.4-RC1"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch","source_type":"PATCH","tags":["patch"]},{"url":"https://metacpan.org/release/SHAY/perl-5.38.4/changes","source_type":"MISC","tags":[]},{"url":"https://metacpan.org/release/SHAY/perl-5.40.2/changes","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2025-04-13T13:16:09.841000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:39:32.546812Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:39:32.546812Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:39:32.546812Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T02:17:18.614695Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T02:17:18.614695Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T02:17:18.614695Z","label":"SSVC decision revised","source":"vulnrichment"}]}