{"id":"CVE-2026-89501","revision":"b861e7852b7849c189655bf87fc04a39","records":[{"revision":"b861e7852b7849c189655bf87fc04a39","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89501","aliases":[],"title":"ring-buffer: Hold cpu_buffer::lock when resizing a subbuf","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Hold cpu_buffer::lock when resizing a subbuf\n\nBecause, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page,\nhold cpu_buffer->lock to prevent races with\nring_buffer_alloc_read_page() and ring_buffer_free_read_page().","state":0,"publishedAt":"2026-09-11T19:43:50.063+00:00","modifiedAt":"2026-10-19T08:47:52.839+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\": \"8e7b58c27b3c567316a51079b375b846f9223bba\",\n                            \"lessThan\": \"8a496aaa3da6e8d545896c2370c7e617cc931ae2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e7b58c27b3c567316a51079b375b846f9223bba\",\n                            \"lessThan\": \"6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e7b58c27b3c567316a51079b375b846f9223bba\",\n                            \"lessThan\": \"bf242baf58de03467f226c8e29554c9495dca7fc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8e7b58c27b3c567316a51079b375b846f9223bba\",\n                            \"lessThan\": \"24974bd0da1b47fd56c975533ead50abf754e74d\",\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\": \"6.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2","https://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2","https://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc","https://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89501","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89501","identifiers":["CVE-2026-89501"]},"retained":false,"historicalAffected":[]}],"coverage":[]}