{"id":"CVE-2026-97919","revision":"e0130c744a8941ce82c88c987c72236e","records":[{"revision":"e0130c744a8941ce82c88c987c72236e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97919","aliases":[],"title":"tracing: Take the reference before publishing the named histogram trigger","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Take the reference before publishing the named histogram trigger\n\nevent_hist_trigger_named_init() puts the trigger on the global\nnamed_triggers list and only then takes the reference on the trigger it\nshares its histogram with:\n\n\tdata->ref++;\n\n\tsave_named_trigger(data->named_data->name, data);\n\n\tret = event_hist_trigger_init(data->named_data);\n\tif (ret < 0) {\n\t\tkfree(data->cmd_ops);\n\t\tdata->cmd_ops = &trigger_hist_cmd;\n\t}\n\n\treturn ret;\n\nevent_hist_trigger_init() fails when alloc_hist_pad() cannot allocate, and\nnothing takes the trigger back off the list on the way out.\nevent_hist_trigger_parse() frees it, and the next lookup by name reads the\nfreed object:\n\n BUG: KASAN: slab-use-after-free in find_named_trigger+0xac/0xc0\n Read of size 8 at addr ffff888009346860 by task init/1\n  find_named_trigger+0xac/0xc0\n  hist_register_trigger+0xc1/0xa00\n  event_hist_trigger_parse+0x3146/0x6af0\n  event_trigger_write+0xce/0x160\n Freed by task 67:\n  kfree+0x154/0x420\n  trigger_kthread_fn+0xfd/0x160\n\nDo the reference first and publish once it has succeeded, so that nothing\nwhich can fail runs after the trigger becomes findable.","state":0,"publishedAt":"2026-09-25T10:22:39.829+00:00","modifiedAt":"2026-10-21T12:53:38.904+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/trace_events_hist.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ac7ab38c271ba2edaeb0dc35b200ec13339776ae\",\n                            \"lessThan\": \"e5c5dad169fb569161d3eed6c3f6a59e65db1830\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e53a8dcd36b9ebc9229450eb594ae20e0b2ae0fd\",\n                            \"lessThan\": \"b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ab0fc61ce73040f89b12d76a8279995ec283541\",\n                            \"lessThan\": \"2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ab0fc61ce73040f89b12d76a8279995ec283541\",\n                            \"lessThan\": \"91c15cdda6033e2439f5975b938754152f3d6e38\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7ab0fc61ce73040f89b12d76a8279995ec283541\",\n                            \"lessThan\": \"0fe23b8eaba0d3372c66b7b31204408da0715edc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"740dab2338f70d93aa8235db5a9541d846d7b21c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.94\",\n                            \"lessThan\": \"6.6.160\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.34\",\n                            \"lessThan\": \"6.12.112\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.15.3\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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/trace_events_hist.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.16\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.16\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\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/e5c5dad169fb569161d3eed6c3f6a59e65db1830","https://git.kernel.org/stable/c/b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8","https://git.kernel.org/stable/c/2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b","https://git.kernel.org/stable/c/91c15cdda6033e2439f5975b938754152f3d6e38","https://git.kernel.org/stable/c/0fe23b8eaba0d3372c66b7b31204408da0715edc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97919","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97919","identifiers":["CVE-2026-97919"]},"retained":false,"historicalAffected":[]}],"coverage":[]}