DEBIAN-CVE-2026-80980

In the Linux kernel, the following vulnerability has been resolved:  net/smc: stop killed, freed and outofsync sharing a byte  The three connection state flags are single-bit bitfields, so they occupy one byte of struct smcconnection and every store to one is a read-modify-write of the other two:      u8  killed : 1;     u8  freed : 1;     u8  outofsync : 1;  They are not written under a common lock. smccdcmsgvalidate() sets outofsync from the receive tasklet, while smcconnkill() sets killed from process context under locksock(), and the receive path does not defer to the backlog when the socket is owned -- smccdcmsgrecv() takes only bhlocksock().  Give each flag its own byte so a store no longer touches its neighbours. All readers test them as booleans and are unchanged. struct smc_connection grows by two bytes.