High severity · published May 6, 2026
CVE-2026-43110
wifi: brcmfmac: validate bsscfg indices in IF events
8.8
CVSS
0.3%
EPSS
No
On KEV
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]
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
3.9 before 6.6.136; 6.7 before 6.12.83; 6.13 before 6.18.24; 6.19 before 6.19.14; 7.0; 7.0; +5 more · source: NVD
LI
Linux · Linux
2880b86859967af710c72f7d34fb421a86a71e22 before b329fbcf075949a038045d8e9b86ae3d5bbd8a54; 2880b86859967af710c72f7d34fb421a86a71e22 before 2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734; 2880b86859967af710c72f7d34fb421a86a71e22 before 9c81bcc2c695e0082012a2a3d36a0eefaa51579c; 2880b86859967af710c72f7d34fb421a86a71e22 before 3ec7437e9d11374105c2c4e47ae671537729d7e6; 2880b86859967af710c72f7d34fb421a86a71e22 before 9fca68c2512a362cad258e4df12a307bb2ee4b8e; 2880b86859967af710c72f7d34fb421a86a71e22 before 1ae1e1caa428844e481231f6dbe9b4f475f1d52d; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43110
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43110
Patch
https://git.kernel.org/stable/c/1ae1e1caa428844e481231f6dbe9b4f475f1d52d
git.kernel.org
https://git.kernel.org/stable/c/2ae3ccb78c0a9ef5ee3d80d02ab319ac1d5af734
Patch
https://git.kernel.org/stable/c/304950a467d83678bd0b0f46331882e2ac23b12d
Patch
https://git.kernel.org/stable/c/3ec7437e9d11374105c2c4e47ae671537729d7e6
git.kernel.org
https://git.kernel.org/stable/c/9c81bcc2c695e0082012a2a3d36a0eefaa51579c
Patch
https://git.kernel.org/stable/c/9fca68c2512a362cad258e4df12a307bb2ee4b8e
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