CVE-2026-43144 PUBLISHED

wifi: brcmfmac: Fix potential kernel oops when probe fails

Assigner: Linux
Reserved: 01.05.2026 Published: 06.05.2026 Updated: 06.05.2026

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: Fix potential kernel oops when probe fails

When probe of the sdio brcmfmac device fails for some reasons (i.e. missing firmware), the sdiodev->bus is set to error instead of NULL, thus the cleanup later in brcmf_sdio_remove() tries to free resources via invalid bus pointer. This happens because sdiodev->bus is set 2 times: first in brcmf_sdio_probe() and second time in brcmf_sdiod_probe(). Fix this by chaning the brcmf_sdio_probe() function to return the error code and set sdio->bus only there.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 0ff0843310b74e565901d85f849fb308c3b1f220 to 64ccb0aac41c5055780c2a58bbe2c1b362ceccde (excl.)
  • affected from 0ff0843310b74e565901d85f849fb308c3b1f220 to 379aac7ee8240848aa35f605b06addb4617c863e (excl.)
  • affected from 0ff0843310b74e565901d85f849fb308c3b1f220 to 243307a0d1b0d01538e202c00454c28b21d4432e (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.13 is affected
  • unaffected from 0 to 6.13 (excl.)
  • unaffected from 6.18.16 to 6.18.* (incl.)
  • unaffected from 6.19.6 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References