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: smb: client: Fix use-after-free in cifs_fill_dirent (CVE-2025-38051)
* kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length (CVE-2025-39933)
* kernel: drm/i915: mark requests for GuC virtual engines to avoid use-after-free (CVE-2023-53552)
* kernel: drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies (CVE-2025-40096)
* kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)
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 10
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 8 | kernel-rt | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-core | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-debug | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-debug-core | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-debug-devel | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-debug-modules | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-debug-modules-extra | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-devel | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-modules | 4.18.0-553.94.1.rt7.435.el8_10 |
| AlmaLinux · 8 | kernel-rt-modules-extra | 4.18.0-553.94.1.rt7.435.el8_10 |
Vulnerabilities 5
-
Critical 9.8
net: atlantic: fix fragment overflow handling in RX path
In the Linux kernel, the following vulnerability has been resolved: net: atlantic: fix fragment overflow handling in RX path The atlantic driver can receive packets with more than MAX_SKB_FRAGS (17) fragments when handling large multi-descriptor packets. This…
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Critical 9.4
smb: client: let recv_done verify data_offset, data_length and remaining_data_length
In the Linux kernel, the following vulnerability has been resolved: smb: client: let recv_done verify data_offset, data_length and remaining_data_length This is inspired by the related server fixes.
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High 7.8
drm/i915: mark requests for GuC virtual engines to avoid use-after-free
In the Linux kernel, the following vulnerability has been resolved: drm/i915: mark requests for GuC virtual engines to avoid use-after-free References to i915_requests may be trapped by userspace inside a sync_file or dmabuf (dma-resv) and held indefinitely a…
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High 7.8
smb: client: Fix use-after-free in cifs_fill_dirent
In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_fill_dirent There is a race condition in the readdir concurrency process, which may access the rsp buffer after it has been released, triggering the fo…
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High 7.8
drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies
In the Linux kernel, the following vulnerability has been resolved: drm/sched: Fix potential double free in drm_sched_job_add_resv_dependencies When adding dependencies with drm_sched_job_add_dependency(), that function consumes the fence reference both on su…
References
-
report
https://access.redhat.com/security/cve/CVE-2023-53552
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report
https://access.redhat.com/security/cve/CVE-2025-38051
-
report
https://access.redhat.com/security/cve/CVE-2025-39933
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report
https://access.redhat.com/security/cve/CVE-2025-40096
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report
https://access.redhat.com/security/cve/CVE-2025-68301
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report
https://bugzilla.redhat.com/2373329
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report
https://bugzilla.redhat.com/2401432
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report
https://bugzilla.redhat.com/2401514
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report
https://bugzilla.redhat.com/2407333
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report
https://bugzilla.redhat.com/2422836
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advisory
https://errata.almalinux.org/8/ALSA-2026-0760.html