{"id":"CVE-2026-97919","title":"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 t…","summary":"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 t…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= e53a8dcd36b9ebc9229450eb594ae20e0b2ae0fd < b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8","Linux >= 7ab0fc61ce73040f89b12d76a8279995ec283541 < 2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b","Linux >= 7ab0fc61ce73040f89b12d76a8279995ec283541 < 91c15cdda6033e2439f5975b938754152f3d6e38","Linux >= 7ab0fc61ce73040f89b12d76a8279995ec283541 < 0fe23b8eaba0d3372c66b7b31204408da0715edc","Linux ac7ab38c271ba2edaeb0dc35b200ec13339776ae","Linux 740dab2338f70d93aa8235db5a9541d846d7b21c","Linux >= 6.12.34 < 6.12.112","Linux >= 6.6.94 < 6.7","Linux >= 6.15.3 < 6.16","Linux 6.16"],"published":"2026-09-25","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:18:09.567","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97919","references":[{"url":"https://git.kernel.org/stable/c/0fe23b8eaba0d3372c66b7b31204408da0715edc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2ffaade3611bd9501bc0b9d5d19fc75bfee7a16b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/91c15cdda6033e2439f5975b938754152f3d6e38","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b6fb2f5370a9a6aec325ab2db1ca3d1a881499b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97919.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97919"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541145"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97919"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97919"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97919.mbox"},{"url":"https://git.kernel.org/stable/c/e5c5dad169fb569161d3eed6c3f6a59e65db1830"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00206,"epssPercentile":0.10586,"cvssSource":"vendor","ingestedAt":"2026-09-25T11:06:38.890Z","slug":"CVE-2026-97919","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97919.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213479,"id":"CVE-2026-97919","ts":1790754735984,"field":"cvss","old":null,"new":"5.5"},{"seq":213478,"id":"CVE-2026-97919","ts":1790754735984,"field":"severity","old":"none","new":"medium"}]}