CVE-2026-80949: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control()

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix memory leak in brcmf_sdio_read_control() The memory allocated for buf is not freed in some of the error paths in brcmf_sdio_read_control(). Fix that by adding vfree() calls. [arend: rework as suggested by Johannes]

Affected products

Linux kernel: 3.8 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0d10db8e94fcb23a799789aaa696b4d8f937e207
https://git.kernel.org/stable/c/261d7c7610b4b2f476382c88a2d1ae0cc5e07add
https://git.kernel.org/stable/c/7704f6ba2a8c492b07a3eaa1e311b4b30d389246
https://git.kernel.org/stable/c/86b57fa3172e287bc083113507a965e6d9a46a45
https://git.kernel.org/stable/c/a732c4f36a4cd79f3702391f88ebb56f2e43b0ee
https://git.kernel.org/stable/c/b1d0a90a844abccdfed9fe141b5d0d654a821485
https://git.kernel.org/stable/c/ba04715ee672c336272be3ceb43bda9ffc33eb75
https://git.kernel.org/stable/c/fdb880a7d575efe8b5c7b5b819b96d9251a3937f

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