RHSA-2026:77214 — Security Advisory

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: linux/dim: Fix divide by 0 in RDMA DIM (CVE-2022-49670)

• kernel: ALSA: 6fire: fix use-after-free on disconnect (CVE-2026-31581)

• kernel: ip6_gre: Use cached t->net in ip6erspan_changelink() (CVE-2026-46120)

• kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)

• kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002)

• kernel: ice: fix double-free of tx_buf skb (CVE-2026-53009)

• kernel: zram: fix use-after-free in zram_bvec_write_partial() (CVE-2026-53185)

• kernel: i2c: stub: Reject I2C block transfers with invalid length (CVE-2026-64191)

• kernel: net: qrtr: restrict socket creation to the initial network namespace (CVE-2026-68294)

• kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)

Bug Fix(es) and Enhancement(s):

• RT scheduler livelock: migrate-disabled task at pushable-list head causes repeated RT push/stopper retries, starving a critical RT task (remaining issue after CVE-2026-45919 fix in 94894c9c477e) (JIRA:RHEL-257978)

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.