CVE-2021-47194

HIGH
Published Apr 10, 2024 Modified Nov 21, 2024 CWE-665

Description

In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it does not call the cleanup cfg80211_stop_ap(), this leads to the initialization of in-use data. For example, this path re-init the sdata->assigned_chanctx_list while it is still an element of assigned_vifs list, and makes that linked list corrupt.

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CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-665 CWE-665

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21 https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13 https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2 https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66 https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24 https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec https://git.kernel.org/stable/c/0738cdb636c21ab552eaecf905efa4a6070e3ebc https://git.kernel.org/stable/c/4e458abbb4a523f1413bfe15c079cf4e24c15b21 https://git.kernel.org/stable/c/52affc201fc22a1ab9a59ef0ed641a9adfcb8d13 https://git.kernel.org/stable/c/563fbefed46ae4c1f70cffb8eb54c02df480b2c2 https://git.kernel.org/stable/c/5a9b671c8d74a3e1b999e7a0c7f366079bcc93dd https://git.kernel.org/stable/c/7b97b5776daa0b39dbdadfea176f9cc0646d4a66 https://git.kernel.org/stable/c/8f06bb8c216bcd172394f61e557727e691b4cb24 https://git.kernel.org/stable/c/b8a045e2a9b234cfbc06cf36923886164358ddec

Frequently Asked Questions

What is CVE-2021-47194? +
In the Linux kernel, the following vulnerability has been resolved: cfg80211: call cfg80211_stop_ap when switch from P2P_GO type If the userspace tools switch from NL80211_IFTYPE_P2P_GO to NL80211_IFTYPE_ADHOC via send_msg(NL80211_CMD_SET_INTERFACE), it does not call the cleanup cfg80211_stop_ap(), this leads to the initialization of in-use data. For example, this path re-init the sdata->assigned_chanctx_list while it is still an element of assigned_vifs list, and makes that linked list corrupt. It has a CVSS v3.1 base score of 7.8 (HIGH).
How severe is CVE-2021-47194? +
CVE-2021-47194 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2021-47194? +
CVE-2021-47194 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-47194? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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