| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix bad hist from corrupting named_triggers list\n\nThe following commands causes a crash:\n\n ~# cd /sys/kernel/tracing/events/rcu/rcu_callback\n ~# echo 'hist:name=bad:keys=common_pid:onmax(bogus).save(common_pid)' > trigger\n bash: echo: write error: Invalid argument\n ~# echo 'hist:name=bad:keys=common_pid' > trigger\n\nBecause the following occurs:\n\nevent_trigger_write() {\n trigger_process_regex() {\n event_hist_trigger_parse() {\n\n data = event_trigger_alloc(..);\n\n event_trigger_register(.., data) {\n cmd_ops->reg(.., data, ..) [hist_register_trigger()] {\n data->ops->init() [event_hist_trigger_init()] {\n save_named_trigger(name, data) {\n list_add(&data->named_list, &named_triggers);\n }\n }\n }\n }\n\n ret = create_actions(); (return -EINVAL)\n if (ret)\n goto out_unreg;\n[..]\n ret = hist_trigger_enable(data, ...) {\n list_add_tail_rcu(&data->list, &file->triggers); <<<---- SKIPPED!!! (this is important!)\n[..]\n out_unreg:\n event_hist_unregister(.., data) {\n cmd_ops->unreg(.., data, ..) [hist_unregister_trigger()] {\n list_for_each_entry(iter, &file->triggers, list) {\n if (!hist_trigger_match(data, iter, named_data, false)) <- never matches\n continue;\n [..]\n test = iter;\n }\n if (test && test->ops->free) <<<-- test is NULL\n\n test->ops->free(test) [event_hist_trigger_free()] {\n [..]\n if (data->name)\n del_named_trigger(data) {\n list_del(&data->named_list); <<<<-- NEVER gets removed!\n }\n }\n }\n }\n\n [..]\n kfree(data); <<<-- frees item but it is still on list\n\nThe next time a hist with name is registered, it causes an u-a-f bug and\nthe kernel can crash.\n\nMove the code around such that if event_trigger_register() succeeds, the\nnext thing called is hist_trigger_enable() which adds it to the list.\n\nA bunch of actions is called if get_named_trigger_data() returns false.\nBut that doesn't need to be called after event_trigger_register(), so it\ncan be moved up, allowing event_trigger_register() to be called just\nbefore hist_trigger_enable() keeping them together and allowing the\nfile->triggers to be properly populated." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/trace/trace_events_hist.c" |
| ], |
| "versions": [ |
| { |
| "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", |
| "lessThan": "5ae1b18f05ee2b849dc03b6c15d7da0c1c6efa77", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", |
| "lessThan": "43b254d46c740bf9dbe65709afa021dd726dfa99", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", |
| "lessThan": "435d2964af815aae456db554c62963b4515f19d0", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", |
| "lessThan": "f1ae50cfb818ce1ac7a674406dfadb7653e2552d", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "067fe038e70f6e64960d26a79c4df5f1413d0f13", |
| "lessThan": "6f86bdeab633a56d5c6dccf1a2c5989b6a5e323e", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/trace/trace_events_hist.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.17", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.17", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.130", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.81", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.18", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.6", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.17", |
| "versionEndExcluding": "6.1.130" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.17", |
| "versionEndExcluding": "6.6.81" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.17", |
| "versionEndExcluding": "6.12.18" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.17", |
| "versionEndExcluding": "6.13.6" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.17", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/5ae1b18f05ee2b849dc03b6c15d7da0c1c6efa77" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/43b254d46c740bf9dbe65709afa021dd726dfa99" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/435d2964af815aae456db554c62963b4515f19d0" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/f1ae50cfb818ce1ac7a674406dfadb7653e2552d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/6f86bdeab633a56d5c6dccf1a2c5989b6a5e323e" |
| } |
| ], |
| "title": "tracing: Fix bad hist from corrupting named_triggers list", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21899", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
