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Vulnerability · Published Apr 10, 2024 · Assigned by Linux

CVE-2021-47194cfg80211: call cfg80211_stop_ap when switch from P2P_GO type

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.3%top 83.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.5-1DEBIAN-CVE-2021-47194
Debian:13linux5.15.5-1DEBIAN-CVE-2021-47194
Debian:14linux5.15.5-1DEBIAN-CVE-2021-47194
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47194
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47194
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47194

Affected products (as reported)

VendorProductVersions
Linux Linux ac800140c20e7ae51117e71289065bedd4930fc2 – before 8f06bb8c216bcd172394f61e557727e691b4cb24ac800140c20e7ae51117e71289065bedd4930fc2 – before 0738cdb636c21ab552eaecf905efa4a6070e3ebcac800140c20e7ae51117e71289065bedd4930fc2 – before 4e458abbb4a523f1413bfe15c079cf4e24c15b21ac800140c20e7ae51117e71289065bedd4930fc2 – before b8a045e2a9b234cfbc06cf36923886164358ddecac800140c20e7ae51117e71289065bedd4930fc2 – before 52affc201fc22a1ab9a59ef0ed641a9adfcb8d13ac800140c20e7ae51117e71289065bedd4930fc2 – before 7b97b5776daa0b39dbdadfea176f9cc0646d4a66ac800140c20e7ae51117e71289065bedd4930fc2 – before 5a9b671c8d74a3e1b999e7a0c7f366079bcc93ddac800140c20e7ae51117e71289065bedd4930fc2 – before 563fbefed46ae4c1f70cffb8eb54c02df480b2c2
Linux Linux 3.6

References