Vulnerability · Published May 6, 2026 · Assigned by Linux

CVE-2026-43110wifi: brcmfmac: validate bsscfg indices in IF events

High 8.8

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 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 80.8% 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: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw bsscfgidx field as an array index without a matching range check. Reject IF events whose bsscfg index does not fit in drvr->iflist[] before indexing the interface array. [add missing wifi prefix]

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:10kernel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-abi-stablelists6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-abi-stablelists4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-abi-stablelists5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-core4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-cross-headers6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-cross-headers4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-cross-headers5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-debug4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-debug5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-debug-core4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-debug-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-debug-devel4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-debug-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-debug-modules4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-debug-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-devel4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-devel-matched5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-doc6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-doc4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-doc5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-headers6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-headers4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-headers5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-modules4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-modules-extra4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:10kernel-rt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-core4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-debug4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-debug5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-debug-core4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-debug-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-devel4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-modules4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-rt-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.134.1.rt7.475.el8_10ALSA-2026:26428
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-tools6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-tools4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-tools5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-tools-libs6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-tools-libs4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-tools-libs5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-uki-virt6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-uki-virt5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-zfcpdump4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-zfcpdump5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10libperf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9libperf5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10perf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8perf4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9perf5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10python3-perf6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:8python3-perf4.18.0-553.134.1.el8_10ALSA-2026:26427
AlmaLinux:9python3-perf5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10rtla6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9rtla5.14.0-687.12.1.el9_8ALSA-2026:21556
AlmaLinux:10rv6.12.0-211.18.1.el10_2ALSA-2026:21557
AlmaLinux:9rv5.14.0-687.12.1.el9_8ALSA-2026:21556
Debian:12linux6.1.176-1DEBIAN-CVE-2026-43110
Debian:13linux6.12.85-1DEBIAN-CVE-2026-43110
Debian:14linux6.19.14-1DEBIAN-CVE-2026-43110
Rocky Linux:10kernel0:6.12.0-211.18.1.el10_2RLSA-2026:21557
Rocky Linux:8kernel0:4.18.0-553.134.1.el8_10RLSA-2026:26427
Rocky Linux:9kernel0:5.14.0-687.12.1.el9_8RLSA-2026:21556
Ubuntu:22.04:LTSlinux5.15.0-186.196UBUNTU-CVE-2026-43110
Ubuntu:24.04:LTSlinux6.8.0-136.136UBUNTU-CVE-2026-43110
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-43110
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-43110
Ubuntu:22.04:LTSlinux-aws5.15.0-1112.119UBUNTU-CVE-2026-43110
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64UBUNTU-CVE-2026-43110
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-43110
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-43110
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-43110
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-43110

Affected products (as reported)

VendorProductVersions
Linux Linux 2880b86859967af710c72f7d34fb421a86a71e22 – before b329fbcf075949a038045d8e9b86ae3d5bbd8a542880b86859967af710c72f7d34fb421a86a71e22 – before 2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af7342880b86859967af710c72f7d34fb421a86a71e22 – before 9c81bcc2c695e0082012a2a3d36a0eefaa51579c2880b86859967af710c72f7d34fb421a86a71e22 – before 3ec7437e9d11374105c2c4e47ae671537729d7e62880b86859967af710c72f7d34fb421a86a71e22 – before 9fca68c2512a362cad258e4df12a307bb2ee4b8e2880b86859967af710c72f7d34fb421a86a71e22 – before 1ae1e1caa428844e481231f6dbe9b4f475f1d52d2880b86859967af710c72f7d34fb421a86a71e22 – before b427c2b05222db36d32ee141609de6128e9091bb2880b86859967af710c72f7d34fb421a86a71e22 – before 304950a467d83678bd0b0f46331882e2ac23b12d
Linux Linux 3.9

Weakness: CWE-129 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References