{"cve":{"cve_id":"CVE-2026-53306","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":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: hvc_iucv: fix off-by-one in number of supported devices\n\nMAX_HVC_IUCV_LINES == HVC_ALLOC_TTY_ADAPTERS == 8.\nThis is the number of entries in:\n  static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];\n\nSometimes hvc_iucv_table[] is limited by:\n(a)\tif (num > hvc_iucv_devices) // for error detection\nor\n(b)\tfor (i = 0; i < hvc_iucv_devices; i++) // in 2 places\n(so these 2 don't agree; second one appears to be correct to me.)\n\nhvc_iucv_devices can be 0..8. This is a counter.\n(c)\tif (hvc_iucv_devices > MAX_HVC_IUCV_LINES)\n\nIf hvc_iucv_devices == 8, (a) allows the code to access hvc_iucv_table[8].\nOops.","published_at":"2026-06-26T19:41:01.338000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff","https://git.kernel.org/stable/c/484357dff256c816d9466bda35eb765685e4dc86","https://git.kernel.org/stable/c/11207e42a332eb8bbcb9fe74df9edd2a807c5607","https://git.kernel.org/stable/c/fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4","https://git.kernel.org/stable/c/a76511bc654819425d3b15e77b523d7f9d81f064","https://git.kernel.org/stable/c/3104a3f40feb107f77d7116ad9bf6c210ab7babf","https://git.kernel.org/stable/c/f1dc8e72de9aabe5d96767a4e97219ac26b79fe5","https://git.kernel.org/stable/c/f2a880e802ad12d1e38039d1334fb1475d0f5241"],"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":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:52.348775Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"484357dff256c816d9466bda35eb765685e4dc86","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:484357dff256c816d9466bda35eb765685e4dc86"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"11207e42a332eb8bbcb9fe74df9edd2a807c5607","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:11207e42a332eb8bbcb9fe74df9edd2a807c5607"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"a76511bc654819425d3b15e77b523d7f9d81f064","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:a76511bc654819425d3b15e77b523d7f9d81f064"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"3104a3f40feb107f77d7116ad9bf6c210ab7babf","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:3104a3f40feb107f77d7116ad9bf6c210ab7babf"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"f1dc8e72de9aabe5d96767a4e97219ac26b79fe5","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:f1dc8e72de9aabe5d96767a4e97219ac26b79fe5"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"44a01d5ba8a4d543694461cd3e178cfa6b3f221b","version_start_inclusive":true,"version_end":"f2a880e802ad12d1e38039d1334fb1475d0f5241","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:44a01d5ba8a4d543694461cd3e178cfa6b3f221b:f2a880e802ad12d1e38039d1334fb1475d0f5241"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"2.6.29","version_start_inclusive":true,"version_end":"2.6.29","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:2.6.29:2.6.29"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"2.6.29","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:2.6.29"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.258","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.258:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.209","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.209:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.141","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.141:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/484357dff256c816d9466bda35eb765685e4dc86","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/11207e42a332eb8bbcb9fe74df9edd2a807c5607","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/a76511bc654819425d3b15e77b523d7f9d81f064","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/3104a3f40feb107f77d7116ad9bf6c210ab7babf","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/f1dc8e72de9aabe5d96767a4e97219ac26b79fe5","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/f2a880e802ad12d1e38039d1334fb1475d0f5241","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-26T19:41:01.338000Z","label":"CVE published","source":null}]}