RLSA-2026:95370: Important: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: net/smc: fix UAF in smccdcrxhandler() by pinning the socket (CVE-2026-64541)

kernel: sctp: avoid authenable sysctl UAF during netns teardown (CVE-2026-68162)

kernel: s390/zcrypt: Validate length for CCA AES cipher key requests (CVE-2026-68452)

kernel: s390/zcrypt: Validate length for CCA ECC private key requests (CVE-2026-68451)

kernel: sunrpc: pin svcxprt across the asynchronous TLS handshake callback (CVE-2026-72222)

kernel: sunrpc: wait for in-flight TLS handshake callback when cancel loses race (CVE-2026-72221)

kernel: fs/resctrl: Fix use-after-free during unmount (CVE-2026-72080)

kernel: sctp: keep chunk->transport in step with the list it is queued on (CVE-2026-74588)

kernel: sctp: clear newtransport when removing a peer (CVE-2026-74586)

kernel: sctp: validate cookie AUTH state before use (CVE-2026-74752)

kernel: s390/vfioccw: Cancel existing workqueues (CVE-2026-80553)

kernel: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak (CVE-2026-80571)

kernel: s390/qeth: validate user buffer length in SNMP and ARP query ioctls (CVE-2026-80584)

kernel: sctp: stop processing a packet once its association is deleted (CVE-2026-89479)

kernel: openvswitch: Fix CT limit teardown use-after-free (CVE-2026-89488)

kernel: s390/boot: Avoid IPL parameter append past command line (CVE-2026-98403)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.