Linux · 
Red Hat · Security advisory · August 20, 2026
Red Hat · Security advisory · August 20, 2026RHSA-2026:57254: Security update for 12 packages
RHSA-2026:57254, released August 20, 2026, fixes 9 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent.
Urgent
CVEs closed
9
1 rated Critical
Exploited
0
None reported
Highest CVSS
9.8
Base score, 0 to 10
Highest EPSS
0.0078
56th percentile
Priority of the 9 CVEs
Patch now 0
Urgent 1
High 8
Routine 0
Fixed package versions
| Product | Release | Fixed in |
|---|---|---|
| kernel-rt | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-core | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug-core | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug-devel | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug-kvm | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug-modules | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-debug-modules-extra | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-devel | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-kvm | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-modules | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
| kernel-rt-modules-extra | RHEL 8 | 0:4.18.0-553.157.1.rt7.498.el8_10 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-52991 | sched/psi: fix race between file release and pressure write | 9.8 | 0.0015 | None reported |
| High | CVE-2026-63887 | kernel: In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Bound iscsi_encode_text_outp... | 9.8 | 0.0078 | None reported |
| High | CVE-2026-63888 | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 9.8 | 0.0078 | None reported |
| High | CVE-2026-68388 | smb/client: handle overlapping allocated ranges in fallocate | 9.8 | 0.0051 | None reported |
| High | CVE-2026-64048 | python3-perf: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 7.8 | 0.0050 | None reported |
| High | CVE-2026-64379 | smb: client: mask server-provided mode to 07777 in modefromsid | 7.8 | 0.0031 | None reported |
| High | CVE-2024-56602 | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 7.8 | 0.0023 | None reported |
| High | CVE-2026-53189 | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 0.0013 | None reported |
| High | CVE-2026-46120 | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 0.0013 | None reported |
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