Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 18

• Critical 10.0
  CVE-2026-74705

  udp: fix potential use-after-free in tunnel segmentation

  In the Linux kernel, the following vulnerability has been resolved: udp: fix potential use-after-free in tunnel segmentation __skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 22, 2026
• Critical 9.8
  CVE-2026-89526

  svcrdma: Validate Read chunk positions before reconstruction

  In the Linux kernel, the following vulnerability has been resolved: svcrdma: Validate Read chunk positions before reconstruction The RPC/RDMA Read chunk position field is supplied by the remote client and stored verbatim in the parsed chunk list. xdr_count_re…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• Critical 9.8
  CVE-2026-90036

  NFSD: Prevent client use-after-free during blocked-lock reaping

  In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during blocked-lock reaping A bare lock owner -- its only remaining reference a blocked lock on nn->blocked_locks_lru -- holds a raw pointer to its nfs4_cl…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 16, 2026
• Critical 9.8
  CVE-2026-93207

  SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry

  In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry svcauth_gss_decode_credbody() writes the caller's rpc_gss_wire_cred field by field and assigns gc_ctx.len only on the suc…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Sep 24, 2026
• Critical 9.3
  CVE-2026-72288

  KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling

  In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling Hyunwoo Kim reports some really bad races should the following situation occur: - LPI-I is pending in vcpu-B'…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• Critical 9.1
  CVE-2026-72320

  netfilter: nft_lookup: fix catchall element handling with inverted lookups

  In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_lookup: fix catchall element handling with inverted lookups nft_lookup_eval() decides whether a lookup matched (`found`) from the direct set lookup and priv->invert before fall…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 15, 2026
• Critical 9.1
  CVE-2026-93228

  svcrdma: Reject Write/Reply chunks with segcount 0

  In the Linux kernel, the following vulnerability has been resolved: svcrdma: Reject Write/Reply chunks with segcount 0 A peer can send a Write or Reply chunk whose segcount field is zero. xdr_check_write_chunk() only rejects segcount > rc_maxpages, so zero pa…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 24, 2026
• High 8.8
  CVE-2026-64030

  wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs

  In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted from a PRIO_ACCESS ML element PER_STA_PROFILE subelement can b…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 8.8
  CVE-2026-68140

  net/iucv: fix use-after-free of a severed iucv_path

  In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use-after-free of a severed iucv_path af_iucv queues not-yet-received message notifications on iucv->message_q, each holding a raw pointer to the connection's iucv_path. When th…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• High 8.8
  CVE-2026-68409

  wifi: mac80211: defer link RX stats percpu free to RCU

  In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: defer link RX stats percpu free to RCU sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU: sta_info_free…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026
• High 8.2
  CVE-2026-80985

  net/smc: carry oversized SMC-Rv2 LLC messages in the queue entry

  In the Linux kernel, the following vulnerability has been resolved: net/smc: carry oversized SMC-Rv2 LLC messages in the queue entry smc_llc_rmt_delete_rkey() and smc_llc_save_add_link_rkeys() read the part of a v2 message that does not fit into the 44-byte u…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Sep 11, 2026
• High 8.1
  CVE-2026-81003

  net/iucv: filter frames in afiucv_hs_rcv() by ingress device

  In the Linux kernel, the following vulnerability has been resolved: net/iucv: filter frames in afiucv_hs_rcv() by ingress device afiucv_hs_rcv() selects a socket from iucv_sk_list by matching four 8-byte name fields in the transport header alone. No check is …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2026
• High 7.8
  CVE-2026-46319

  net/sched: act_ct: Only release RCU read lock after ct_ft

  In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: Only release RCU read lock after ct_ft When looking up a flow table in act_ct in tcf_ct_flow_table_get(), rhashtable_lookup_fast() internally opens and closes an RCU read c…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 9, 2026
• High 7.8
  CVE-2026-53011

  net/sched: taprio: fix use-after-free in advance_sched() on schedule switch

  In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 2026
• High 7.8
  CVE-2026-68377

  net/sched: act_tunnel_key: Defer dst_release to RCU callback

  In the Linux kernel, the following vulnerability has been resolved: net/sched: act_tunnel_key: Defer dst_release to RCU callback Fix a race-condition use-after-free in tunnel_key_release_params(). The function releases the metadata_dst of the old params synch…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• High 7.8
  CVE-2026-68404

  wifi: cfg80211: use wiphy work for socket owner autodisconnect

  In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: use wiphy work for socket owner autodisconnect nl80211_netlink_notify() walks the cfg80211 wireless device list when a NETLINK_GENERIC socket is released. If the socket owns a…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026
• High 7.8
  CVE-2026-72262

  ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get

  In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get The ipc_control_data buffer is allocated as kzalloc(max_size), where max_size covers the entire struct sof_ipc_ctrl_data includ…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• High 7.8
  CVE-2026-74641

  ALSA: usx2y: bound the hwdep mmap fault offset

  In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: bound the hwdep mmap fault offset snd_us428ctls_vm_fault() turns the faulting page offset into a kernel address with no bound of any kind: offset = vmf->pgoff << PAGE_SHIFT; vadd…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 22, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2486979
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492286
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502460
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513234
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513277
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513293
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513299
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516526
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516575
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2516606
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2521436
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2521498
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532279
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532309
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2532515
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2535158
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2540182
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2540230
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_83156.json
• report
  https://access.redhat.com/security/cve/CVE-2026-46319
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46319
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46319
• article
  https://lore.kernel.org/linux-cve-announce/2026060925-CVE-2026-46319-ab3d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53011
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53011
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53011
• article
  https://kernelcve.org/list/?q=CVE-2026-53011
• article
  https://lore.kernel.org/linux-cve-announce/2026062449-CVE-2026-53011-6b0a@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64030
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64030
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64030
• article
  https://lore.kernel.org/linux-cve-announce/2026071903-CVE-2026-64030-51b6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-68140
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68140
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-68140
• article
  https://lore.kernel.org/linux-cve-announce/2026081059-CVE-2026-68140-f4e1@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-68377
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-68377