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

sfc: farch: fix TX queue lookup in TX flush done handling

We're starting from a TXQ instance number ('qid'), not a TXQ type, so
efx_get_tx_queue() is inappropriate (and could return NULL, leading
to panics).

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-46949
• https://git.kernel.org/stable/c/5b1faa92289b53cad654123ed2bc8e10f6ddd4ac
• https://git.kernel.org/stable/c/98d91180748986bfb6dfb3e72765f3225719a647
• https://git.kernel.org/stable/c/a1570985ec04116cc665b760faf666a104154170
• https://git.kernel.org/stable/c/fb791572d6747ef385f628450f8d57cd132e6e5a