RHSA-2026:35896 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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.

Description

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

Security Fix(es):

• kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)
• kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)
• kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)
• kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
• kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)
• kernel: mptcp: fix slab-use-after-free in __inet_lookup_established (CVE-2026-31669)
• kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)
• kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)
• kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop (CVE-2026-46090)
• kernel: RDMA/rxe: Fix double free in rxe_srq_from_init (CVE-2026-45852)
• kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2429602 - CVE-2025-71116 kernel: libceph: make decode_pool() more resilient against corrupted osdmaps
• BZ - 2432389 - CVE-2026-22984 kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done()
• BZ - 2432400 - CVE-2026-22990 kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental()
• BZ - 2454810 - CVE-2026-23455 kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()
• BZ - 2455334 - CVE-2026-31408 kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
• BZ - 2461503 - CVE-2026-31669 kernel: mptcp: fix slab-use-after-free in __inet_lookup_established
• BZ - 2467228 - CVE-2026-43198 kernel: tcp: fix potential race in tcp_v6_syn_recv_sock()
• BZ - 2468124 - CVE-2026-43329 kernel: netfilter: flowtable: strictly check for maximum number of actions
• BZ - 2481980 - CVE-2026-46090 kernel: ALSA: aloop: Fix peer runtime UAF during format-change stop
• BZ - 2482166 - CVE-2026-45852 kernel: RDMA/rxe: Fix double free in rxe_srq_from_init
• BZ - 2482532 - CVE-2026-46181 kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()

CVEs

• CVE-2025-71116
• CVE-2026-22984
• CVE-2026-22990
• CVE-2026-23455
• CVE-2026-31408
• CVE-2026-31669
• CVE-2026-43198
• CVE-2026-43329
• CVE-2026-45852
• CVE-2026-46090
• CVE-2026-46181

References

• https://access.redhat.com/security/updates/classification/#important