RHSA-2026:65712 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 9.4 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.

Description

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

Security Fix(es):

• kernel: Kernel: Privilege escalation via uninitialized data in vmci transport packet (CVE-2025-38403)
• kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114)
• kernel: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels (CVE-2026-46099)
• kernel: rxrpc: Fix potential UAF after skb_unshare() failure (CVE-2026-45998)
• kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056)
• kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)
• kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)
• kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006)
• kernel: ice: fix double-free of tx_buf skb (CVE-2026-53009)
• kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info() (CVE-2026-53196)
• kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode (CVE-2026-63886)
• kernel: crypto: qat - validate RSA CRT component lengths (CVE-2026-64304)

Bug Fix(es) and Enhancement(s):

• smb: client: use actual path when queryfs (JIRA:RHEL-145425)
• RT scheduler livelock caused by missing backport of 94894c9c477e [rhel-9.4.z] (JIRA:RHEL-244408)
• kernel warning : kernel/softirq.c:306 do_softirq_post_smp_call_flush+0x29/0x60 when system is booted with nosmt [rhel-9.4.z] (JIRA:RHEL-80300)

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.

Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture.

Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.

Affected Products

• Red Hat Enterprise Linux Server - AUS 9.4 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4 s390x

Fixes

• BZ - 2383421 - CVE-2025-38403 kernel: Kernel: Privilege escalation via uninitialized data in vmci transport packet
• BZ - 2466994 - CVE-2026-43114 kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
• BZ - 2481972 - CVE-2026-46099 kernel: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
• BZ - 2482024 - CVE-2026-45998 kernel: rxrpc: Fix potential UAF after skb_unshare() failure
• BZ - 2482181 - CVE-2026-46056 kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
• BZ - 2482576 - CVE-2026-46117 kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()
• BZ - 2482581 - CVE-2026-46145 kernel: RDMA/mana: Validate rx_hash_key_len
• BZ - 2492363 - CVE-2026-53006 kernel: ipv6: fix possible UAF in icmpv6_rcv()
• BZ - 2492390 - CVE-2026-53009 kernel: ice: fix double-free of tx_buf skb
• BZ - 2492750 - CVE-2026-53196 kernel: USB: serial: io_ti: fix heap overflow in get_manuf_info()
• BZ - 2502329 - CVE-2026-63886 kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode
• BZ - 2507119 - CVE-2026-64304 kernel: crypto: qat - validate RSA CRT component lengths

CVEs

• CVE-2025-38403
• CVE-2026-43114
• CVE-2026-45998
• CVE-2026-46056
• CVE-2026-46099
• CVE-2026-46117
• CVE-2026-46145
• CVE-2026-53006
• CVE-2026-53009
• CVE-2026-53196
• CVE-2026-63886
• CVE-2026-64304

References

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