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Vulnerability · Published May 21, 2024 · Assigned by Linux

CVE-2021-47252batman-adv: Avoid WARN_ON timing related checks

Medium 5.5

In plain English

A medium-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 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 86.6% 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: batman-adv: Avoid WARN_ON timing related checks The soft/batadv interface for a queued OGM can be changed during the time the OGM was queued for transmission and when the OGM is actually transmitted by the worker. But WARN_ON must be used to denote kernel bugs and not to print simple warnings. A warning can simply be printed using pr_warn.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.46-1DEBIAN-CVE-2021-47252
Debian:13linux5.10.46-1DEBIAN-CVE-2021-47252
Debian:14linux5.10.46-1DEBIAN-CVE-2021-47252
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47252
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47252
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47252

Affected products (as reported)

VendorProductVersions
Linux Linux ef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 45011f2973f6b52cf50db397bb27bf805f5f0e7fef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 6031daaaf6d5c359c99dfffa102e332df234ff09ef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 77a99aad5bc3ea105806ebae6be3cbadc2fc615eef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before e8e9d2968a9d08bf5c683afca182f1537edebf8def0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before e7fbd8184fa9e85f0d648c499841cb7ff6dec9f4ef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 282baa8104af44e04c4af3e7f933b44267c7f86fef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 2eb4e0b3631832a4291c8bf4c9db873f60b128c8ef0a937f7a1450d3a133ccd83c9c7d07587e7a00 – before 9f460ae31c4435fd022c443a6029352217a16ac1
Linux Linux 3.14

References