In the Linux kernel, the following vulnerability has been resolved:
net: ieee802154: at86rf230: Stop leaking skb's
Upon error the ieee802154xmitcomplete() helper is not called. Only ieee802154wakequeue() is called manually. In the Tx case we then leak the skb structure.
Free the skb structure upon error before returning when appropriate.
As the 'istx = 0' cannot be moved in the complete handler because of a possible race between the delay in switching to STATERXAACKON and a new interrupt, we introduce an intermediate 'was_tx' boolean just for this purpose.
There is no Fixes tag applying here, many changes have been made on this area and the issue kind of always existed.