| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix event leak upon exit\n\nWhen a task is scheduled out, pending sigtrap deliveries are deferred\nto the target task upon resume to userspace via task_work.\n\nHowever failures while adding an event's callback to the task_work\nengine are ignored. And since the last call for events exit happen\nafter task work is eventually closed, there is a small window during\nwhich pending sigtrap can be queued though ignored, leaking the event\nrefcount addition such as in the following scenario:\n\n TASK A\n -----\n\n do_exit()\n exit_task_work(tsk);\n\n <IRQ>\n perf_event_overflow()\n event->pending_sigtrap = pending_id;\n irq_work_queue(&event->pending_irq);\n </IRQ>\n =========> PREEMPTION: TASK A -> TASK B\n event_sched_out()\n event->pending_sigtrap = 0;\n atomic_long_inc_not_zero(&event->refcount)\n // FAILS: task work has exited\n task_work_add(&event->pending_task)\n [...]\n <IRQ WORK>\n perf_pending_irq()\n // early return: event->oncpu = -1\n </IRQ WORK>\n [...]\n =========> TASK B -> TASK A\n perf_event_exit_task(tsk)\n perf_event_exit_event()\n free_event()\n WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1)\n // leak event due to unexpected refcount == 2\n\nAs a result the event is never released while the task exits.\n\nFix this with appropriate task_work_add()'s error handling." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/events/core.c" |
| ], |
| "versions": [ |
| { |
| "version": "8bffa95ac19ff27c8261904f89d36c7fcf215d59", |
| "lessThan": "67fad724f1b568b356c1065d50df46e6b30eb2f7", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "517e6a301f34613bff24a8e35b5455884f2d83d8", |
| "lessThan": "70882d7fa74f0731492a0d493e8515a4f7131831", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "517e6a301f34613bff24a8e35b5455884f2d83d8", |
| "lessThan": "05d3fd599594abf79aad4484bccb2b26e1cb0b51", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "517e6a301f34613bff24a8e35b5455884f2d83d8", |
| "lessThan": "3d7a63352a93bdb8a1cdf29606bf617d3ac1c22a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "517e6a301f34613bff24a8e35b5455884f2d83d8", |
| "lessThan": "2fd5ad3f310de22836cdacae919dd99d758a1f1b", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "78e1317a174edbfd1182599bf76c092a2877672c", |
| "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/events/core.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.1", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.1", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.165", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.103", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.44", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.10.3", |
| "lessThanOrEqual": "6.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.11", |
| "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": "5.15.84", |
| "versionEndExcluding": "5.15.165" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.1.103" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.6.44" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.10.3" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1", |
| "versionEndExcluding": "6.11" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.0.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/67fad724f1b568b356c1065d50df46e6b30eb2f7" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/70882d7fa74f0731492a0d493e8515a4f7131831" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/05d3fd599594abf79aad4484bccb2b26e1cb0b51" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/3d7a63352a93bdb8a1cdf29606bf617d3ac1c22a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/2fd5ad3f310de22836cdacae919dd99d758a1f1b" |
| } |
| ], |
| "title": "perf: Fix event leak upon exit", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-43870", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
