{"id":"CVE-2026-93134","summary":"printk: Fix possible console use-after-free","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nprintk: Fix possible console use-after-free\n\nWhen emitting a record via legacy printing, it is possible that a handover\nto another legacy printing context occurs. When a context has performed a\nhandover, the console SRCU read lock is released and the pointer to the\nconsole struct might now be invalid. Therefore, after calling\nnbcon_legacy_emit_next_record() or console_emit_next_record(), it is\nnecessary to check if a handover occurred _before_ further @con usage.\n\nSashiko pointed out that console_flush_one_record() was not doing this.\n\nIn console_flush_one_record(), after emitting a record, move the further\nusage of @con after the handover check.","modified":"2026-09-18T03:48:44.537326887Z","published":"2026-09-17T16:11:36.077Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93134.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/36630cafbeede0b64c370edb2f7b4094327ee1e0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8f194dee0c0d1223255bae1429e1939882f540fc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f0104a7b730de32eefb3d4a27279592b5504ad59"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fbf9bb81b21537ede387a31cc586f1d2ce66a74e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93134.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93134"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c158834b223fbfab3a14855ac203b8d9cddbbefd"},{"fixed":"f0104a7b730de32eefb3d4a27279592b5504ad59"},{"fixed":"fbf9bb81b21537ede387a31cc586f1d2ce66a74e"},{"fixed":"8f194dee0c0d1223255bae1429e1939882f540fc"},{"fixed":"36630cafbeede0b64c370edb2f7b4094327ee1e0"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93134.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93134.json"}}],"schema_version":"1.9.0"}