RHSA-2026:72623 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 9.

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

Security Fix(es):

• kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)

• kernel: RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE (CVE-2026-46325)

• kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)

• kernel: fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh() (CVE-2026-53341)

• kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)

• kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)

• kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)

• kernel: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() (CVE-2026-80522)

• kernel: perf: Reject exited events as group leaders (CVE-2026-74753)

Bug Fix(es) and Enhancement(s):

• KVM: s390: Limit adapter indicator access to mapped page [rhel-9.8.z] (JIRA:RHEL-188656)

• crypto: xxhash64 should not be fips approved [rhel-9.8.z] (JIRA:RHEL-256437)

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.