RHSA-2026:67721 - Security Advisory

Topic

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.

Description

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: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry (CVE-2026-43114)
• kernel: rxrpc: Fix potential UAF after skb_unshare() failure (CVE-2026-45998)
• kernel: selinux: fix overlayfs mmap() and mprotect() access checks (CVE-2026-46054)
• kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers (CVE-2026-46056)
• kernel: crypto: ccp - copy IV using skcipher ivsize (CVE-2026-53016)
• kernel: ipv6: fix possible UAF in icmpv6_rcv() (CVE-2026-53006)
• kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071)
• 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)
• kernel: packet: use consistent hard_header_len in non-ring send paths ()

Bug Fix(es) and Enhancement(s):

• RT scheduler livelock caused by missing backport of 94894c9c477e (JIRA:RHEL-244407)

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 for x86_64 - Update Services for SAP Solutions 9.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64

Fixes

• BZ - 2466994 - CVE-2026-43114 kernel: netfilter: nft_set_pipapo_avx2: don't return non-matching entry on expiry
• BZ - 2482024 - CVE-2026-45998 kernel: rxrpc: Fix potential UAF after skb_unshare() failure
• BZ - 2482025 - CVE-2026-46054 kernel: selinux: fix overlayfs mmap() and mprotect() access checks
• BZ - 2482181 - CVE-2026-46056 kernel: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
• BZ - 2492269 - CVE-2026-53016 kernel: crypto: ccp - copy IV using skcipher ivsize
• BZ - 2492363 - CVE-2026-53006 kernel: ipv6: fix possible UAF in icmpv6_rcv()
• BZ - 2492458 - CVE-2026-53071 kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp
• 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
• BZ - 2519475 - kernel: packet: use consistent hard_header_len in non-ring send paths

CVEs

• CVE-2026-43114
• CVE-2026-45998
• CVE-2026-46054
• CVE-2026-46056
• CVE-2026-53006
• CVE-2026-53016
• CVE-2026-53071
• CVE-2026-53196
• CVE-2026-63886
• CVE-2026-64304
• CVE-2026-74582

References

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