What’s Vulnerable › Vulnerabilities

CVE-2021-47571: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-24 · updated 2026-06-17
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: staging: rtl8192e: Fix use after free in _rtl92e_pci_disconnect() The free_rtllib() function frees the "dev" pointer so there is use after free on the next line. Re-arrange things to avoid that.

Affected products

• Linux kernel: from 3.2 before 4.4.294; from 4.5 before 4.9.292; from 4.10 before 4.14.257; from 4.15 before 4.19.219; from 4.20 before 5.4.163; from 5.5 before 5.10.83 — fixed in 4.14.257, 4.19.219, 4.4.294, 4.9.292, 5.10.83, 5.15.6

How to fix

Upgrade to a fixed version: Linux kernel 4.14.257, 4.19.219, 4.4.294, 4.9.292. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2e1ec01af2c7139c6a600bbfaea1a018b35094b6
• https://git.kernel.org/stable/c/8d0163cec7de995f9eb9c3128c83fb84f0cb1c64
• https://git.kernel.org/stable/c/9186680382934b0e7529d3d70dcc0a21d087683b
• https://git.kernel.org/stable/c/b535917c51acc97fb0761b1edec85f1f3d02bda4
• https://git.kernel.org/stable/c/bca19bb2dc2d89ce60c4a4a6e59609d4cf2e13ef
• https://git.kernel.org/stable/c/c0ef0e75a858cbd8618b473f22fbca36106dcf82
• https://git.kernel.org/stable/c/d43aecb694b10db9a4228ce2d38b5ae8de374443
• https://git.kernel.org/stable/c/e27ee2f607fe6a9b923ef1fc65461c0613c97594
• https://git.kernel.org/stable/c/2e1ec01af2c7139c6a600bbfaea1a018b35094b6
• https://git.kernel.org/stable/c/8d0163cec7de995f9eb9c3128c83fb84f0cb1c64
• https://git.kernel.org/stable/c/9186680382934b0e7529d3d70dcc0a21d087683b
• https://git.kernel.org/stable/c/b535917c51acc97fb0761b1edec85f1f3d02bda4

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