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CVE-2022-48985— net: mana: Fix race on per-CQ variable napi work_done

EPSS 0.02% · P5
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I. Basic Information for CVE-2022-48985

Vulnerability Information
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Vulnerability Title
net: mana: Fix race on per-CQ variable napi work_done
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix race on per-CQ variable napi work_done After calling napi_complete_done(), the NAPIF_STATE_SCHED bit may be cleared, and another CPU can start napi thread and access per-CQ variable, cq->work_done. If the other thread (for example, from busy_poll) sets it to a value >= budget, this thread will continue to run when it should stop, and cause memory corruption and panic. To fix this issue, save the per-CQ work_done variable in a local variable before napi_complete_done(), so it won't be corrupted by a possible concurrent thread after napi_complete_done(). Also, add a flag bit to advertise to the NIC firmware: the NAPI work_done variable race is fixed, so the driver is able to reliably support features like busy_poll.
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net:mana子系统中per-CQ变量napi work_done的竞争条件问题。
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 e1b5683ff62e7b328317aec08869495992053e9d ~ fe50a9bbeb1f042e756c5cfa7708112c944368de -
LinuxLinux 5.15 -

II. Public POCs for CVE-2022-48985

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III. Intelligence Information for CVE-2022-48985

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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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