Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 16

• Critical 9.8
  CVE-2026-64541

  net/smc: fix UAF in smc_cdc_rx_handler() by pinning the socket

  In the Linux kernel, the following vulnerability has been resolved: net/smc: fix UAF in smc_cdc_rx_handler() by pinning the socket smc_cdc_rx_handler() looks up the connection by token under the link group's conns_lock, drops the lock, and then dereferences c…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 27, 2026
• Critical 9.8
  CVE-2026-72221

  sunrpc: wait for in-flight TLS handshake callback when cancel loses race

  In the Linux kernel, the following vulnerability has been resolved: sunrpc: wait for in-flight TLS handshake callback when cancel loses race When wait_for_completion_interruptible_timeout() in svc_tcp_handshake() returns 0 (timeout) or -ERESTARTSYS (signal) a…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• Critical 9.8
  CVE-2026-72222

  sunrpc: pin svc_xprt across the asynchronous TLS handshake callback

  In the Linux kernel, the following vulnerability has been resolved: sunrpc: pin svc_xprt across the asynchronous TLS handshake callback svc_tcp_handshake() stores the raw svc_xprt pointer in tls_handshake_args.ta_data and submits the request through tls_serve…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• Critical 9.8
  CVE-2026-74586 Public exploit

  sctp: clear new_transport when removing a peer

  In the Linux kernel, the following vulnerability has been resolved: sctp: clear new_transport when removing a peer sctp_process_asconf_param() stores a newly added peer transport in asoc->new_transport. After all parameters in the ASCONF chunk have been proce…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 22, 2026
• Critical 9.8
  CVE-2026-74588

  sctp: keep chunk->transport in step with the list it is queued on

  In the Linux kernel, the following vulnerability has been resolved: sctp: keep chunk->transport in step with the list it is queued on __sctp_outq_flush_rtx() moves a gap-acked chunk onto another transport's transmitted list without updating chunk->transport: …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 22, 2026
• Critical 9.8
  CVE-2026-74752

  sctp: validate cookie AUTH state before use

  In the Linux kernel, the following vulnerability has been resolved: sctp: validate cookie AUTH state before use When cookie authentication is disabled, COOKIE_ECHO restores fixed-size AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM len…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 26, 2026
• Critical 9.8
  CVE-2026-89479

  sctp: stop processing a packet once its association is deleted

  In the Linux kernel, the following vulnerability has been resolved: sctp: stop processing a packet once its association is deleted sctp_endpoint_bh_rcv() looks the association up only when chunk->asoc is NULL, and caches the result in chunk->asoc and chunk->t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• High 8.8
  CVE-2026-80553

  s390/vfio_ccw: Cancel existing workqueues

  In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Cancel existing workqueues The initialization of the io_work and crw_work workqueues begs the question of whether they should be un-initialized. Add the corresponding cleanup t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 26, 2026
• High 8.4
  CVE-2026-80584

  s390/qeth: validate user buffer length in SNMP and ARP query ioctls

  In the Linux kernel, the following vulnerability has been resolved: s390/qeth: validate user buffer length in SNMP and ARP query ioctls qeth_snmp_command() and qeth_l3_arp_query() allocate a buffer sized by a user-supplied length (udata_len) without checking …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 26, 2026
• High 7.8
  CVE-2026-68162

  sctp: avoid auth_enable sysctl UAF during netns teardown

  In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026
• High 7.8
  CVE-2026-68451

  s390/zcrypt: Validate length for CCA ECC private key requests

  In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validate length for CCA ECC private key requests cca_ecc2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject th…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 13, 2026
• High 7.8
  CVE-2026-68452

  s390/zcrypt: Validate length for CCA AES cipher key requests

  In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Validate length for CCA AES cipher key requests cca_cipher2protkey() derives the copy length for the CPRB parameter block directly from the length field in the key token. Reject …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 13, 2026
• High 7.8
  CVE-2026-72080

  fs/resctrl: Fix use-after-free during unmount

  In the Linux kernel, the following vulnerability has been resolved: fs/resctrl: Fix use-after-free during unmount During unmount or failure teardown all mon_data structures that contain monitoring event file private data are freed after which kernfs nodes are…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• High 7.8
  CVE-2026-89488

  openvswitch: Fix CT limit teardown use-after-free

  In the Linux kernel, the following vulnerability has been resolved: openvswitch: Fix CT limit teardown use-after-free Packet processing uses CT limit state under RCU, while netns teardown frees that state under ovs_mutex. The CT limit pointer was neither remo…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• Unscored —
  CVE-2026-80571

  powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak

  In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: papr-phy-attest - validate cmd.length, plug mem leak In papr_phy_attest_create_handle(), the params->cmd.length is not validated before use, which can result in a buffer over…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 26, 2026
• Unscored —
  CVE-2026-98403

  s390/boot: Avoid IPL parameter append past command line

  In the Linux kernel, the following vulnerability has been resolved: s390/boot: Avoid IPL parameter append past command line A command line may occupy all but the terminating byte of COMMAND_LINE_SIZE. In that case append_ipl_block_parm() passes a zero size to…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Oct 14, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507721
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513314
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515351
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2515353
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516278
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516412
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516674
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2521384
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2521419
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2524422
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2524442
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2524458
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2524475
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532290
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532407
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2552209
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_95370.json
• report
  https://access.redhat.com/security/cve/CVE-2026-64541
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64541
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64541
• article
  https://kernelcve.org/list/?q=CVE-2026-64541
• article
  https://lore.kernel.org/linux-cve-announce/2026072735-CVE-2026-64541-21ef@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-68162
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68162
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-68162
• article
  https://lore.kernel.org/linux-cve-announce/2026081004-CVE-2026-68162-086a@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-68451
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68451
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-68451
• article
  https://kernelcve.org/list/?q=CVE-2026-68451
• article
  https://lore.kernel.org/linux-cve-announce/2026081328-CVE-2026-68451-b640@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-68452
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68452
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-68452
• article
  https://kernelcve.org/list/?q=CVE-2026-68452
• article
  https://lore.kernel.org/linux-cve-announce/2026081330-CVE-2026-68452-f495@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-72080
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-72080