RLSA-2026:91565

Dashboard / Vulnerabilities / RLSA-2026:91565

RLSA-2026:91565

Summary: Important: kernel security, bug fix, and enhancement update

Details: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236) * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388) * kernel: net: shaper: rework the VALID marking (again) (CVE-2026-64027) * kernel: net/handshake: hand off the pinned file reference to accept_doit (CVE-2026-63979) * kernel: net/handshake: Drain pending requests at net namespace exit (CVE-2026-63978) * kernel: af_unix: Fix UAF read of tail->len in unix_stream_data_wait() (CVE-2026-64109) * kernel: net/handshake: Take a long-lived file reference at submit (CVE-2026-64523) * kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136) * kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338) * kernel: scsi: target: core: Fix iSCSI ISID use-after-free in REGISTER AND MOVE (CVE-2026-72083) * kernel: KVM: s390: pci: Reject adapter interrupt forwarding if already enabled (CVE-2026-74515) * kernel: net: smc: fix splice entry lifetime imbalance in smc_rx_splice (CVE-2026-74631) * kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824) * kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638) * kernel: vfio/pci: clear vdev->msi_perm after freeing it on init failure (CVE-2026-89777) * kernel: md/raid5-ppl: fix use-after-free in ppl_do_flush() (CVE-2026-93262) Bug Fix(es) and Enhancement(s): * x86/microcode: Add platform mask to Intel microcode "old" list [Rocky Linux-10] [rhel-10.2.z] (JIRA:Rocky Linux-212778) * net: NULL pointer deref kernel panic in fib6_walk_continue under heavy VRF churn [rhel-10.2.z] (JIRA:Rocky Linux-245489) * backport fixes for lockdep issues reported with rt-debug [rhel-10.2.z] (JIRA:Rocky Linux-259937) 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.

References: https://errata.rockylinux.org/RLSA-2026:91565, https://bugzilla.redhat.com/show_bug.cgi?id=2492709, https://bugzilla.redhat.com/show_bug.cgi?id=2502255, https://bugzilla.redhat.com/show_bug.cgi?id=2502341, https://bugzilla.redhat.com/show_bug.cgi?id=2502376, https://bugzilla.redhat.com/show_bug.cgi?id=2502382, https://bugzilla.redhat.com/show_bug.cgi?id=2502615, https://bugzilla.redhat.com/show_bug.cgi?id=2507122, https://bugzilla.redhat.com/show_bug.cgi?id=2513163, https://bugzilla.redhat.com/show_bug.cgi?id=2513264, https://bugzilla.redhat.com/show_bug.cgi?id=2516579, https://bugzilla.redhat.com/show_bug.cgi?id=2517006, https://bugzilla.redhat.com/show_bug.cgi?id=2521413, https://bugzilla.redhat.com/show_bug.cgi?id=2528642, https://bugzilla.redhat.com/show_bug.cgi?id=2532122, https://bugzilla.redhat.com/show_bug.cgi?id=2535066, https://bugzilla.redhat.com/show_bug.cgi?id=2540323, https://access.redhat.com/errata/RHSA-2026:91565