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CVE-2022-48950— perf: Fix perf_pending_task() UaF

EPSS 0.04% · P14
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I. Basic Information for CVE-2022-48950

Vulnerability Information
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Vulnerability Title
perf: Fix perf_pending_task() UaF
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix perf_pending_task() UaF Per syzbot it is possible for perf_pending_task() to run after the event is free()'d. There are two related but distinct cases: - the task_work was already queued before destroying the event; - destroying the event itself queues the task_work. The first cannot be solved using task_work_cancel() since perf_release() itself might be called from a task_work (____fput), which means the current->task_works list is already empty and task_work_cancel() won't be able to find the perf_pending_task() entry. The simplest alternative is extending the perf_event lifetime to cover the task_work. The second is just silly, queueing a task_work while you know the event is going away makes no sense and is easily avoided by re-arranging how the event is marked STATE_DEAD and ensuring it goes through STATE_OFF on the way down.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在perf_pending_task函数中可能发生释放后重用错误，如果perf_pending_task函数在事件被释放后运行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux ca7b0a10287e2733bdafb01ef0d4038536625fe3 ~ 8bffa95ac19ff27c8261904f89d36c7fcf215d59 -
LinuxLinux 5.15.77 ~ 5.15.84 -

II. Public POCs for CVE-2022-48950

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III. Intelligence Information for CVE-2022-48950

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Same Patch Batch · Linux · 2024-10-21 · 372 CVEs total

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CVE-2024-50009cpufreq: amd-pstate: add check for cpufreq_cpu_get's return value
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Showing top 20 of 372 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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