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High ELSA-2026-55764 10 CVEs

Important: kernel security, bug fix, and enhancement update (Oracle Linux 8)

Published Aug 20, 2026 · Updated Aug 20, 2026

Summary

[4.18.0-553.155.1]
- Update Oracle Linux certificates (Kevin Lyons)
- Disable signing for aarch64 (Ilya Okomin)
- Oracle Linux RHCK Module Signing Key was added to the kernel trusted keys list (olkmod_signing_key.pem) [Orabug: 29539237]
- Update x509.genkey [Orabug: 24817676]
- Conflict with shim-ia32 and shim-x64 <= 15.3-1.0.3
- Remove upstream reference during boot (Kevin Lyons) [Orabug: 34750652]
- Add new Oracle Linux Driver Signing (key 1) certificate [Orabug: 37985772]
- udf: fix partition descriptor append bookkeeping (Ravi Singh) [RHEL-179571] {CVE-2026-45991}
- ice: fix double-free of tx_buf skb (Michal Schmidt) [RHEL-192193] {CVE-2026-53009}

[4.18.0-553.156.1]
- drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CKI Backport Bot) [RHEL-221327] {CVE-2026-43206}
- drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async (CKI Backport Bot) [RHEL-222576] {CVE-2026-64219}
- drm/amdgpu: fix amdgpu_hmm_range_get_pages (CKI Backport Bot) [RHEL-222620] {CVE-2026-63879}
- drm/i915: Fix potential UAF in TTM object purge (CKI Backport Bot) [RHEL-222738] {CVE-2026-63884}
- drm/amd/display: Use krealloc_array() in dal_vector_reserve() (CKI Backport Bot) [RHEL-222662] {CVE-2026-53329}
- drm/amd/display: Clamp VBIOS HDMI retimer register count to array size (CKI Backport Bot) [RHEL-222680] {CVE-2026-53136}
- mm/slub: avoid accessing metadata when pointer is invalid in object_err() (Luiz Capitulino) [RHEL-226551] {CVE-2025-39902}
- drm/amdgpu: zero-initialize GART table on allocation (CKI Backport Bot) [RHEL-222656] {CVE-2026-53374}
- vhost: reset the vring metadata cache on vring reconfiguration (CKI Backport Bot) [RHEL-224556]
- can: bcm: extend bcm_tx_lock usage for data and timer updates (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: add locking when updating filter and timer values (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: fix locking for bcm_op runtime updates (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: add locking for bcm_op runtime updates (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: check the result of can_send() in bcm_can_tx() (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: Use hrtimer_forward_now() (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet (Guillaume Nault) [RHEL-216711] {CVE-2026-17523}
- sched/deadline: Update GRUB description in the documentation (Herton R. Krzesinski) [RHEL-189997]
- sched/deadline: fix kABI breakage after the introduction of max_bw on dl_rq (Herton R. Krzesinski) [RHEL-189997]
- sched/deadline: Fix bandwidth reclaim equation in GRUB (Herton R. Krzesinski) [RHEL-189997]
- crypto: ccp - copy IV using skcipher ivsize (CKI Backport Bot) [RHEL-188453] {CVE-2026-53016}

Fixed packages 20

ReleasePackageFixed in
Oracle Linux · 8 bpftool 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-abi-stablelists 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-core 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-cross-headers 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-debug 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-debug-core 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-debug-devel 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-debug-modules 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-debug-modules-extra 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-devel 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-doc 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-headers 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-modules 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-modules-extra 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-tools 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-tools-libs 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 kernel-tools-libs-devel 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 perf 0:4.18.0-553.156.1.el8_10
Oracle Linux · 8 python3-perf 0:4.18.0-553.156.1.el8_10

Vulnerabilities 10

  • High 8.8

    drm/amdgpu: zero-initialize GART table on allocation

    In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping. Since amdgpu_bo_create_kernel() does not zero-initialize the buffer, when a sin…

  • High 7.8

    can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet

    In the Linux kernel, the following vulnerability has been resolved: can: bcm: switch timer to HRTIMER_MODE_SOFT and remove hrtimer_tasklet This patch switches the timer to HRTIMER_MODE_SOFT, which executed the timer callback in softirq context and removes the…

  • High 7.8

    drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()

    In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without checking the buffer size parameter. Th…

  • High 7.8

    crypto: ccp - copy IV using skcipher ivsize

    In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - copy IV using skcipher ivsize AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver. ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer w…

  • High 7.8

    drm/amdgpu: fix amdgpu_hmm_range_get_pages

    In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix amdgpu_hmm_range_get_pages The notifier sequence must only be read once or otherwise we could work with invalid pages. While at it also fix the coding style, e.g. drop the pre…

  • High 7.8

    drm/i915: Fix potential UAF in TTM object purge

    In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fix potential UAF in TTM object purge TLDR: The bo->ttm object might be changed by calling ttm_bo_validate(), move casting it to an i915_tt object later to actually get the right po…

  • High 7.1

    mm/slub: avoid accessing metadata when pointer is invalid in object_err()

    In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However,…

  • High 7.0

    drm/amd/display: Use krealloc_array() in dal_vector_reserve()

    In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Use krealloc_array() in dal_vector_reserve() [Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struct_size" using uint32_t arithmetic, whic…

  • High 7.0

    drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async

    In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async [Why&How] dc_process_dmub_aux_transfer_async() copies payload->length bytes into a 16-byte stack …

  • Unscored —

    drm/amd/display: Clamp VBIOS HDMI retimer register count to array size

    In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size [Why & How] The VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and Hdmi6GRegNum fields that are used a…