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CVE-2021-47669— can: vxcan: vxcan_xmit: fix use after free bug

EPSS 0.06% · P20
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I. Basic Information for CVE-2021-47669

Vulnerability Information
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Vulnerability Title
can: vxcan: vxcan_xmit: fix use after free bug
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
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vxcan_xmit函数中释放后重用skb内存。
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 a8f820a380a2a06fc4fe1a54159067958f800929 ~ 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 -
LinuxLinux 4.12 -

II. Public POCs for CVE-2021-47669

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III. Intelligence Information for CVE-2021-47669

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Same Patch Batch · Linux · 2025-04-17 · 5 CVEs total

CVE-2021-47671can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path
CVE-2021-47670can: peak_usb: fix use after free bugs
CVE-2021-47668can: dev: can_restart: fix use after free bug
CVE-2020-36789can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard IRQ context

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47669

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