Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 18

• High 7.8
  CVE-2026-46300 Exploited Public exploit EPSS 16%

  net: skbuff: preserve shared-frag marker during coalescing

  In the Linux kernel, the following vulnerability has been resolved: net: skbuff: preserve shared-frag marker during coalescing skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 23, 2026

  KEV Oct 28, 2026
• Critical 9.8
  CVE-2025-68741

  scsi: qla2xxx: Fix improper freeing of purex item

  In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix improper freeing of purex item In qla2xxx_process_purls_iocb(), an item is allocated via qla27xx_copy_multiple_pkt(), which internally calls qla24xx_alloc_purex_item(). The…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 24, 2025
• Critical 9.8
  CVE-2026-22984

  libceph: prevent potential out-of-bounds reads in handle_auth_done()

  In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds reads in handle_auth_done() Perform an explicit bounds check on payload_len to avoid a possible out-of-bounds access in the callout. [ idryomov: chang…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 23, 2026
• Critical 9.8
  CVE-2026-31402 Public exploit

  nfsd: fix heap overflow in NFSv4.0 LOCK replay cache

  In the Linux kernel, the following vulnerability has been resolved: nfsd: fix heap overflow in NFSv4.0 LOCK replay cache The NFSv4.0 replay cache uses a fixed 112-byte inline buffer (rp_ibuf[NFSD4_REPLAY_ISIZE]) to store encoded operation responses. This size…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Apr 3, 2026
• Critical 9.8
  CVE-2026-31607

  usbip: validate number_of_packets in usbip_pack_ret_submit()

  In the Linux kernel, the following vulnerability has been resolved: usbip: validate number_of_packets in usbip_pack_ret_submit() When a USB/IP client receives a RET_SUBMIT response, usbip_pack_ret_submit() unconditionally overwrites urb->number_of_packets fro…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Apr 24, 2026
• Critical 9.1
  CVE-2025-71116

  libceph: make decode_pool() more resilient against corrupted osdmaps

  In the Linux kernel, the following vulnerability has been resolved: libceph: make decode_pool() more resilient against corrupted osdmaps If the osdmap is (maliciously) corrupted such that the encoded length of ceph_pg_pool envelope is less than what is expect…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 14, 2026
• High 8.8
  CVE-2026-43284 Public exploit EPSS 94%

  xfrm: esp: avoid in-place decrypt on shared skb frags

  In the Linux kernel, the following vulnerability has been resolved: xfrm: esp: avoid in-place decrypt on shared skb frags MSG_SPLICE_PAGES can attach pages from a pipe directly to an skb. TCP marks such skbs with SKBFL_SHARED_FRAG after skb_splice_from_iter()…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 8, 2026
• High 8.8
  CVE-2026-43503 Public exploit

  net: skbuff: propagate shared-frag marker through frag-transfer helpers

  In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker through frag-transfer helpers Two frag-transfer helpers (__pskb_copy_fclone() and skb_shift()) fail to propagate the SKBFL_SHARED_FRAG bit in skb_shi…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 23, 2026
• High 8.1
  CVE-2026-23401

  KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE

  In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE When installing an emulated MMIO SPTE, do so *after* dropping/zapping the existing SPTE (if it's shadow-present). …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Apr 1, 2026
• High 7.8
  CVE-2026-23270

  net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks

  In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the curren…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Mar 18, 2026
• High 7.8
  CVE-2026-31532

  can: raw: fix ro->uniq use-after-free in raw_rcv()

  In the Linux kernel, the following vulnerability has been resolved: can: raw: fix ro->uniq use-after-free in raw_rcv() raw_release() unregisters raw CAN receive filters via can_rx_unregister(), but receiver deletion is deferred with call_rcu(). This leaves a …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Apr 23, 2026
• High 7.8
  CVE-2026-43128

  RDMA/umem: Fix double dma_buf_unpin in failure path

  In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Fix double dma_buf_unpin in failure path In ib_umem_dmabuf_get_pinned_with_dma_device(), the call to ib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf is immediately …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 6, 2026
• High 7.5
  CVE-2026-22990

  libceph: replace overzealous BUG_ON in osdmap_apply_incremental()

  In the Linux kernel, the following vulnerability has been resolved: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() If the osdmap is (maliciously) corrupted such that the incremental osdmap epoch is different from what is expected, there is …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 23, 2026
• High 7.5
  CVE-2026-23136

  libceph: reset sparse-read state in osd_fault()

  In the Linux kernel, the following vulnerability has been resolved: libceph: reset sparse-read state in osd_fault() When a fault occurs, the connection is abandoned, reestablished, and any pending operations are retried. The OSD client tracks the progress of …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Feb 14, 2026
• High 7.1
  CVE-2026-23204

  net/sched: cls_u32: use skb_header_pointer_careful()

  In the Linux kernel, the following vulnerability has been resolved: net/sched: cls_u32: use skb_header_pointer_careful() skb_header_pointer() does not fully validate negative @offset values. Use skb_header_pointer_careful() instead. GangMin Kim provided a rep…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 14, 2026
• High 7.1
  CVE-2026-46333 Public exploit

  ptrace: slightly saner 'get_dumpable()' logic

  In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and ma…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 15, 2026
• Unscored —
  CVE-2025-39766

  net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit

  In the Linux kernel, the following vulnerability has been resolved: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit The following setup can trigger a WARNING in htb_activate due to the condition: !cl->leaf.q->q.qlen tc qdisc del dev lo …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 11, 2025
• Unscored —
  CVE-2026-43163

  md/bitmap: fix GPF in write_page caused by resize race

  In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod] This is a use-after-fre…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 6, 2026

References

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