mirror of
https://github.com/CVEProject/cvelist.git
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140 lines
8.0 KiB
JSON
140 lines
8.0 KiB
JSON
{
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"data_version": "4.0",
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"data_type": "CVE",
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"data_format": "MITRE",
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"CVE_data_meta": {
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"ID": "CVE-2024-43870",
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"ASSIGNER": "cve@kernel.org",
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"STATE": "PUBLIC"
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},
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"description": {
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"description_data": [
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{
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"lang": "eng",
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"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."
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}
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]
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},
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"problemtype": {
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"problemtype_data": [
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{
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"description": [
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{
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"lang": "eng",
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"value": "n/a"
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}
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]
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}
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]
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},
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"affects": {
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"vendor": {
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"vendor_data": [
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{
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"vendor_name": "Linux",
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"product": {
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"product_data": [
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{
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"product_name": "Linux",
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"version": {
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"version_data": [
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{
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"version_affected": "<",
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"version_name": "8bffa95ac19f",
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"version_value": "67fad724f1b5"
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},
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{
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"version_affected": "<",
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"version_name": "517e6a301f34",
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"version_value": "70882d7fa74f"
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},
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{
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"version_value": "not down converted",
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"x_cve_json_5_version_data": {
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"versions": [
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{
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"version": "6.1",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.1",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.165",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.103",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.44",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10.3",
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"lessThanOrEqual": "6.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.11",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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],
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"defaultStatus": "affected"
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}
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}
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]
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}
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}
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]
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}
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}
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]
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}
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},
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"references": {
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"reference_data": [
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{
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"url": "https://git.kernel.org/stable/c/67fad724f1b568b356c1065d50df46e6b30eb2f7",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/67fad724f1b568b356c1065d50df46e6b30eb2f7"
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},
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{
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"url": "https://git.kernel.org/stable/c/70882d7fa74f0731492a0d493e8515a4f7131831",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/70882d7fa74f0731492a0d493e8515a4f7131831"
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},
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{
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"url": "https://git.kernel.org/stable/c/05d3fd599594abf79aad4484bccb2b26e1cb0b51",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/05d3fd599594abf79aad4484bccb2b26e1cb0b51"
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},
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{
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"url": "https://git.kernel.org/stable/c/3d7a63352a93bdb8a1cdf29606bf617d3ac1c22a",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/3d7a63352a93bdb8a1cdf29606bf617d3ac1c22a"
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},
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{
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"url": "https://git.kernel.org/stable/c/2fd5ad3f310de22836cdacae919dd99d758a1f1b",
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"refsource": "MISC",
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"name": "https://git.kernel.org/stable/c/2fd5ad3f310de22836cdacae919dd99d758a1f1b"
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}
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]
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},
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"generator": {
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"engine": "bippy-9e1c9544281a"
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}
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} |