{"id":"CVE-2026-43272","revision":"d16a4e6ec2654e739a716559c01727c8","records":[{"revision":"d16a4e6ec2654e739a716559c01727c8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43272","aliases":[],"title":"ring-buffer: Fix possible dereference of uninitialized pointer","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix possible dereference of uninitialized pointer\n\nThere is a pointer head_page in rb_meta_validate_events() which is not\ninitialized at the beginning of a function. This pointer can be dereferenced\nif there is a failure during reader page validation. In this case the control\nis passed to \"invalid\" label where the pointer is dereferenced in a loop.\n\nTo fix the issue initialize orig_head and head_page before calling\nrb_validate_buffer.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.","state":0,"publishedAt":"2026-05-06T11:28:56.162+00:00","modifiedAt":"2026-10-21T12:40:28.662+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/trace/ring_buffer.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55\",\n                            \"lessThan\": \"a4afdff9c715af50cf6c3f2dc601932c2cea17a2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55\",\n                            \"lessThan\": \"bc77986f3cb7476637052edf2d87137fa39f153d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55\",\n                            \"lessThan\": \"d9942396845fef2369478c157b26738fe07142f6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55\",\n                            \"lessThan\": \"f1547779402c4cd67755c33616b7203baa88420b\",\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/trace/ring_buffer.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\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.16\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.6\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/a4afdff9c715af50cf6c3f2dc601932c2cea17a2","https://git.kernel.org/stable/c/bc77986f3cb7476637052edf2d87137fa39f153d","https://git.kernel.org/stable/c/d9942396845fef2369478c157b26738fe07142f6","https://git.kernel.org/stable/c/f1547779402c4cd67755c33616b7203baa88420b"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43272","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43272","identifiers":["CVE-2026-43272"]},"retained":false,"historicalAffected":[]}],"coverage":[]}