{"id":"CVE-2026-93134","revision":"75ce258281c84386887d5e9e2675fb12","records":[{"revision":"75ce258281c84386887d5e9e2675fb12","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93134","aliases":[],"title":"printk: Fix possible console use-after-free","description":"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.","state":0,"publishedAt":"2026-09-17T16:11:36.077+00:00","modifiedAt":"2026-10-19T09:06:07.19+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/printk/printk.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\n                            \"lessThan\": \"f0104a7b730de32eefb3d4a27279592b5504ad59\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\n                            \"lessThan\": \"fbf9bb81b21537ede387a31cc586f1d2ce66a74e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\n                            \"lessThan\": \"8f194dee0c0d1223255bae1429e1939882f540fc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c158834b223fbfab3a14855ac203b8d9cddbbefd\",\n                            \"lessThan\": \"36630cafbeede0b64c370edb2f7b4094327ee1e0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/printk/printk.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/f0104a7b730de32eefb3d4a27279592b5504ad59","https://git.kernel.org/stable/c/fbf9bb81b21537ede387a31cc586f1d2ce66a74e","https://git.kernel.org/stable/c/8f194dee0c0d1223255bae1429e1939882f540fc","https://git.kernel.org/stable/c/36630cafbeede0b64c370edb2f7b4094327ee1e0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93134","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93134","identifiers":["CVE-2026-93134"]},"retained":false,"historicalAffected":[]}],"coverage":[]}