{"apiVersion":"1.0","identifier":"CVE-2026-99235","description":"In the Linux kernel, the following vulnerability has been resolved: tracing: Save the event file instead of the compatible histogram create_field_var_hist() creates a histogram on the matched event to supply a field variable, and records it on the target so it can be torn down later: hist_data = find_compatible_hist(target_hist_data, file); ... /* Save the compatible histogram information */ var_hist->hist_data = hist_data; hist_data is not the histogram it creates. It is one that was already there, whose keys the new one copies. The saved pointer has a single user, unregister_field_var_hists(), which runs when the target is removed: file = hist_data->field_var_hists[i]->hist_data->event_file; find_compatible_hist() matches on keys alone, so it can pick one with no variables of its own. check_var_refs() then returns false and the user can remove it while the target still points at it: BUG: KASAN: slab-use-after-free in event_hist_trigger_free+0x2b2/0x320 Read of size 8 at addr ffff8880093b90e0 by task init/1 Freed by task 1: kfree+0x154/0x420 event_hist_trigger_free+0x1d5/0x320 event_hist_trigger_parse+0x35f3/0x69e0 trigger_process_regex+0x1a6/0x250 Save the event file instead. It is all the dereference ever wanted, and it does not go away when the user removes a trigger.","publishedAt":"2026-11-02T16:17:48","lastModifiedAt":"2026-11-03T20:18:29","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-99235","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00122,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-99235","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-99235","en":"https://www.redsauce.net/en/cves/CVE-2026-99235","fr":"https://www.redsauce.net/fr/cves/CVE-2026-99235","pt":"https://www.redsauce.net/pt/cves/CVE-2026-99235","de":"https://www.redsauce.net/de/cves/CVE-2026-99235","sk":"https://www.redsauce.net/sk/cves/CVE-2026-99235","el":"https://www.redsauce.net/el/cves/CVE-2026-99235"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-99235"}}