Summary
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released (CVE-2025-40323)
* kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)
* kernel: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg (CVE-2026-46230)
* kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB (CVE-2026-46204)
* kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg (CVE-2026-46199)
* kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)
* kernel: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer (CVE-2026-64034)
* kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)
* kernel: Linux kernel: libceph stack out-of-bounds write via crafted OSDMap (CVE-2026-68159)
* kernel: libceph: refresh auth->authorizer_buf{,_len} after authorizer update (CVE-2026-68156)
* kernel: Linux kernel (libceph): Denial of Service due to malformed monitor maps (CVE-2026-68155)
* kernel: drm/amdgpu: Fix context pstate override handling (CVE-2026-68273)
* kernel: perf: Reject exited events as group leaders (CVE-2026-74753)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Fixed packages 1
| Release | Package | Fixed in |
|---|---|---|
| Rocky Linux · 8 | kernel-rt | 0:4.18.0-553.169.1.rt7.510.el8_10 |
Vulnerabilities 13
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Critical 9.8
libceph: refresh auth->authorizer_buf{,_len} after authorizer update
In the Linux kernel, the following vulnerability has been resolved: libceph: refresh auth->authorizer_buf{,_len} after authorizer update ceph_x_create_authorizer() caches au->buf->vec.iov_base and au->buf->vec.iov_len in struct ceph_auth_handshake. These cach…
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Critical 9.8
libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
In the Linux kernel, the following vulnerability has been resolved: libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE __decode_pg_temp() decodes an user-controlled length but only rejects values large enough to overflow the allocation; it …
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Critical 9.3
net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer
In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer In mana_hwc_rx_event_handler(), resp->response.hwc_msg_id is read from DMA-coherent memory and bounds-checked, then mana_hwc_h…
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High 7.8
fbcon: Set fb_display[i]->mode to NULL when the mode is released
In the Linux kernel, the following vulnerability has been resolved: fbcon: Set fb_display[i]->mode to NULL when the mode is released Recently, we discovered the following issue through syzkaller: BUG: KASAN: slab-use-after-free in fb_mode_is_equal+0x285/0x2f0…
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High 7.8
ext4: fix e4b bitmap inconsistency reports
In the Linux kernel, the following vulnerability has been resolved: ext4: fix e4b bitmap inconsistency reports A bitmap inconsistency issue was observed during stress tests under mixed huge-page workloads. Ext4 reported multiple e4b bitmap check failures like…
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High 7.8
arm64: tlb: Flush walk cache when unsharing PMD tables
In the Linux kernel, the following vulnerability has been resolved: arm64: tlb: Flush walk cache when unsharing PMD tables When huge_pmd_unshare() is called to unshare a PMD table, the tlb_unshare_pmd_ptdesc() function sets tlb->unshared_tables=true but the a…
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High 7.8
perf/core: Detach event groups during remove_on_exec
In the Linux kernel, the following vulnerability has been resolved: perf/core: Detach event groups during remove_on_exec perf_event_remove_on_exec() removes events by calling perf_event_exit_event(). For top-level events, this removes the event from the conte…
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High 7.8
drm/amdgpu: Fix context pstate override handling
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix context pstate override handling There are several problems in the context pstate handling code. The most serious ones are potential use-after-free and NULL pointer dereferenc…
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High 7.8
perf: Reject exited events as group leaders
In the Linux kernel, the following vulnerability has been resolved: perf: Reject exited events as group leaders perf_event_remove_on_exec() sets remove-on-exec events to the EXIT state and detaches their group relationships. The event's file descriptor can re…
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High 7.5
libceph: Reject monmaps advertising zero monitors
In the Linux kernel, the following vulnerability has been resolved: libceph: Reject monmaps advertising zero monitors A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the ex…
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High 7.1
drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg Check bounds against the end of the BO whenever we access the msg.
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High 7.1
drm/amdgpu/vcn4: Prevent OOB reads when parsing IB
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB Rewrite the IB parsing to use amdgpu_ib_get_value() which handles the bounds checks.
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High 7.1
drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg Check bounds against the end of the BO whenever we access the msg.
References
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2419883
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2482104
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2482533
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2482543
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2482649
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502318
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2502394
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2508319
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2513165
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2513232
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2513295
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2513434
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report
https://bugzilla.redhat.com/show_bug.cgi?id=2524434
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advisory
https://access.redhat.com/errata/RHSA-2026:72467