RHSA-2026:93047 - 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: ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS (CVE-2022-50315)
• kernel: Linux kernel: Denial of Service in qla2xxx SCSI driver due to improper command handling after chip reset (CVE-2025-68745)
• kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
• kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table() (CVE-2026-43450)
• kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493)
• kernel: Linux kernel: xfrm single-frag length not properly limited ()
• kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show() (CVE-2026-46149)
• kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)
• kernel: sctp: validate embedded INIT chunk and address list lengths in cookie (CVE-2026-53224)
• kernel: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing (CVE-2026-53246)
• kernel: mac802154: llsec: add skb_cow_data() before in-place crypto (CVE-2026-63831)
• kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802)
• kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() (CVE-2026-63924)
• kernel: ipv6: exthdrs: refresh nh after handling HAO option (CVE-2026-63922)
• kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)
• kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() (CVE-2026-63993)
• kernel: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() (CVE-2026-63984)
• kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017)
• kernel: nvmet-auth: validate reply message payload bounds against transfer length (CVE-2026-64319)
• kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)
• kernel: selinux: check connect-related permissions on TCP Fast Open (CVE-2026-72243)
• kernel: ALSA: usx2y: bound the hwdep mmap fault offset (CVE-2026-74641)
• kernel: ipv6: fix use-after-free in ip6_finish_output2() (CVE-2026-80792)
• kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846)
• kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation ()

Bug Fix(es) and Enhancement(s):

• BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580 (JIRA:RHEL-242997)

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 - 2395363 - CVE-2022-50315 kernel: ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS
• BZ - 2425039 - CVE-2025-68745 kernel: Linux kernel: Denial of Service in qla2xxx SCSI driver due to improper command handling after chip reset
• BZ - 2464455 - CVE-2026-43020 kernel: Bluetooth: MGMT: validate LTK enc_size on load
• BZ - 2468228 - CVE-2026-43450 kernel: netfilter: nfnetlink_cthelper: fix OOB read in nfnl_cthelper_dump_table()
• BZ - 2479812 - CVE-2026-43493 kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests
• BZ - 2482566 - CVE-2026-46149 kernel: scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()
• BZ - 2492364 - CVE-2026-52972 kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000
• BZ - 2492769 - CVE-2026-53224 kernel: sctp: validate embedded INIT chunk and address list lengths in cookie
• BZ - 2492771 - CVE-2026-53246 kernel: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing
• BZ - 2502243 - CVE-2026-63831 kernel: mac802154: llsec: add skb_cow_data() before in-place crypto
• BZ - 2502251 - CVE-2026-63802 kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush()
• BZ - 2502326 - CVE-2026-63924 kernel: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo()
• BZ - 2502327 - CVE-2026-63922 kernel: ipv6: exthdrs: refresh nh after handling HAO option
• BZ - 2502330 - CVE-2026-63920 kernel: ipv6: validate extension header length before copying to cmsg
• BZ - 2502369 - CVE-2026-63993 kernel: vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()
• BZ - 2502395 - CVE-2026-63984 kernel: ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
• BZ - 2502449 - CVE-2026-64017 kernel: blk-mq: pop cached request if it is usable
• BZ - 2507096 - CVE-2026-64319 kernel: nvmet-auth: validate reply message payload bounds against transfer length
• BZ - 2516501 - CVE-2026-72098 kernel: dm-verity: fix buffer overflow in FEC calculation
• BZ - 2516684 - CVE-2026-72243 kernel: selinux: check connect-related permissions on TCP Fast Open
• BZ - 2521436 - CVE-2026-74641 kernel: ALSA: usx2y: bound the hwdep mmap fault offset
• BZ - 2528542 - CVE-2026-80792 kernel: ipv6: fix use-after-free in ip6_finish_output2()
• BZ - 2535391 - CVE-2026-89846 kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read
• BZ - 2540872 - kernel: kernel: strparser: use-after-free via msg_timer_work rearm after strp_done() cancellation

CVEs

• CVE-2022-50315
• CVE-2025-68745
• CVE-2026-43020
• CVE-2026-43450
• CVE-2026-43493
• CVE-2026-46149
• CVE-2026-52972
• CVE-2026-53224
• CVE-2026-53246
• CVE-2026-63802
• CVE-2026-63831
• CVE-2026-63920
• CVE-2026-63922
• CVE-2026-63924
• CVE-2026-63984
• CVE-2026-63993
• CVE-2026-64017
• CVE-2026-64319
• CVE-2026-72098
• CVE-2026-72243
• CVE-2026-74641
• CVE-2026-80792
• CVE-2026-89846

References

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