Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 92

Vulnerabilities 18

• High 8.8
  CVE-2026-89811

  drm/amdkfd: Add TLB flush after MES queue eviction/suspension

  In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Add TLB flush after MES queue eviction/suspension MES (Micro Engine Scheduler) does not perform heavy-weight TLB invalidation after unmapping queues, unlike HWS which does this au…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 16, 2026
• High 8.6
  CVE-2026-80590

  inet: frags: strip GSO state from fragments before reassembly

  In the Linux kernel, the following vulnerability has been resolved: inet: frags: strip GSO state from fragments before reassembly A virtio_net_hdr (tun/tap, or AF_PACKET with PACKET_VNET_HDR) can mark an IPv4 or IPv6 fragment as GSO; nothing relates gso_type …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 28, 2026
• High 8.4
  CVE-2026-80536

  xfs: bounds-check buffer log item's dirty bitmap

  In the Linux kernel, the following vulnerability has been resolved: xfs: bounds-check buffer log item's dirty bitmap xlog_recover_do_reg_buffer() replays each dirty region described by a buffer log item's bitmap into the buffer read for that item: memcpy(xfs_…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 26, 2026
• High 7.8
  CVE-2026-64114

  ipv4: raw: reject IP_HDRINCL packets with ihl < 5

  In the Linux kernel, the following vulnerability has been resolved: ipv4: raw: reject IP_HDRINCL packets with ihl < 5 raw_send_hdrinc() validates that the caller-supplied IPv4 header fits within the message length: iphlen = iph->ihl * 4; err = -EINVAL; if (ip…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.8
  CVE-2026-64266

  fuse: re-lock request before returning from fuse_ref_folio()

  In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before returning from fuse_ref_folio() fuse_ref_folio() unlocks the request but does not re-lock it before returning. fuse_chan_abort() can end the request and the async…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• High 7.8
  CVE-2026-64481

  ALSA: hda/cs35l41: Fix firmware load work teardown

  In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/cs35l41: Fix firmware load work teardown cs35l41_hda creates ALSA controls whose private data points at the cs35l41_hda object. The firmware load control can also queue fw_load_work…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 25, 2026
• High 7.8
  CVE-2026-68202

  ALSA: seq: close a re-opened queue timer in the destructor

  In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: close a re-opened queue timer in the destructor queue_delete() closes the queue timer, then frees it. snd_seq_timer_close() clears q->timer->timeri. snd_use_lock_sync() then drains…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• High 7.8
  CVE-2026-68236

  drm/amd/display: set new_stream to NULL after release

  In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL. If a l…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• High 7.8
  CVE-2026-68245

  drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid()

  In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix lifetime issue of amdgpu_vm_get_task_info_pasid() The vm pointer returned from amdgpu_vm_get_vm_from_pasid() is only valid while the lock is still being held. Once xa_unlock_i…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026
• High 7.8
  CVE-2026-89791

  perf: Fix use-after-free when perf mmap() revival races with the last munmap()

  In the Linux kernel, the following vulnerability has been resolved: perf: Fix use-after-free when perf mmap() revival races with the last munmap() perf_mmap_close() drops rb->mmap_count *without* holding event->mmap_mutex (the refcount_dec_and_test() right be…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Sep 16, 2026
• High 7.8
  CVE-2026-93817

  perf: Fix addr_filter_ranges lifetime

  In the Linux kernel, the following vulnerability has been resolved: perf: Fix addr_filter_ranges lifetime Lee Jia Jie reported that since event::addr_filter_ranges is used under RCU, it should be RCU freed.

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 24, 2026
• High 7.5
  CVE-2026-64048

  net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot

  In the Linux kernel, the following vulnerability has been resolved: net/smc: reject CHID-0 ACCEPT that matches an empty ism_dev slot On the SMC-D client, slot 0 of ini->ism_dev[]/ini->ism_chid[] is reserved for an SMC-Dv1 device. smc_find_ism_v2_device_clnt()…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Unscored —
  CVE-2025-38147

  calipso: Don't call calipso functions for AF_INET sk.

  In the Linux kernel, the following vulnerability has been resolved: calipso: Don't call calipso functions for AF_INET sk. syzkaller reported a null-ptr-deref in txopt_get(). [0] The offset 0x70 was of struct ipv6_txoptions in struct ipv6_pinfo, so struct ipv6…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 3, 2025
• Unscored —
  CVE-2026-64572

  ipv4: fib: free fib_alias with kfree_rcu() on insert error path

  In the Linux kernel, the following vulnerability has been resolved: ipv4: fib: free fib_alias with kfree_rcu() on insert error path fib_table_insert() publishes new_fa into the leaf's fa_list with fib_insert_alias() before calling the fib entry notifiers. Whe…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 5, 2026
• Unscored —
  CVE-2026-68278

  drm/dp/mst: fix buffer overflows in sideband chunk accumulation

  In the Linux kernel, the following vulnerability has been resolved: drm/dp/mst: fix buffer overflows in sideband chunk accumulation drm_dp_sideband_append_payload() has three related bugs when processing device-provided sideband reply data: 1. Zero-length cur…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 10, 2026
• Unscored —
  CVE-2026-68448

  ovl: check access to copy_file_range source with src mounter creds

  In the Linux kernel, the following vulnerability has been resolved: ovl: check access to copy_file_range source with src mounter creds Commit 5dae222a5ff0c ("vfs: allow copy_file_range to copy across devices") allowed filesystems that implement the copy_file_…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 12, 2026
• Unscored —
  CVE-2026-80887

  drm/vmwgfx: use check_add_overflow for shader size+offset bound

  In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: use check_add_overflow for shader size+offset bound vmw_shader_define() validates the user-supplied shader window against its backing buffer with (u64)buffer->tbo.base.size < (u64…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 4, 2026
• Unscored —
  CVE-2026-97493

  drm/amdgpu: Bound GPIO I2C table entry count from VBIOS

  In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Bound GPIO I2C table entry count from VBIOS Reject undersized tables and cap the derived entry count to AMDGPU_MAX_I2C_BUS so we do not overrun adev->i2c_bus[] or walk an absurd n…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 24, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2376106
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502486
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  https://bugzilla.redhat.com/show_bug.cgi?id=2540475
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_88477.json
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  https://access.redhat.com/security/cve/CVE-2025-38147
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38147
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38147
• article
  https://lore.kernel.org/linux-cve-announce/2025070335-CVE-2025-38147-52a6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64048
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64048
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64048
• article
  https://kernelcve.org/list/?q=CVE-2026-64048
• article
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• report
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• advisory
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• advisory
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• article
  https://kernelcve.org/list/?q=CVE-2026-64114
• article
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• report
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• advisory
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• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64266
• article
  https://kernelcve.org/list/?q=CVE-2026-64266
• article
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