# RHSA-2026:57253: Security update for 23 packages RHSA-2026:57253, released August 20, 2026, fixes 9 CVEs across 23 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/rhsa-2026-57253 - Platform: Linux - Released: Aug 20, 2026 - Priority: Urgent (Closes CVE-2026-52991, rated Critical) - CVEs: 9, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://access.redhat.com/errata/RHSA-2026:57253 ## Applies to | Product | Release | Fixed in | |---|---|---| | [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-zfcpdump](https://patchblox.com/security/data/product/linux/kernel-zfcpdump.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-zfcpdump-core](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-core.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-zfcpdump-devel](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-devel.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-zfcpdump-modules](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [kernel-zfcpdump-modules-extra](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules-extra.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [perf](https://patchblox.com/security/data/product/linux/perf.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | | [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | RHEL 8 | 0:4.18.0-553.157.1.el8_10 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-52991](https://patchblox.com/security/data/cve/CVE-2026-52991.md) | Urgent | sched/psi: fix race between file release and pressure write | 9.8 | 0.0015 | | | [CVE-2026-63887](https://patchblox.com/security/data/cve/CVE-2026-63887.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Bound iscsi_encode_text_outp... | 9.8 | 0.0078 | | | [CVE-2026-63888](https://patchblox.com/security/data/cve/CVE-2026-63888.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 9.8 | 0.0078 | | | [CVE-2026-68388](https://patchblox.com/security/data/cve/CVE-2026-68388.md) | High | smb/client: handle overlapping allocated ranges in fallocate | 9.8 | 0.0051 | | | [CVE-2026-64048](https://patchblox.com/security/data/cve/CVE-2026-64048.md) | High | 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 | | | [CVE-2026-64379](https://patchblox.com/security/data/cve/CVE-2026-64379.md) | High | smb: client: mask server-provided mode to 07777 in modefromsid | 7.8 | 0.0031 | | | [CVE-2024-56602](https://patchblox.com/security/data/cve/CVE-2024-56602.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 7.8 | 0.0023 | | | [CVE-2026-53189](https://patchblox.com/security/data/cve/CVE-2026-53189.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 0.0013 | | | [CVE-2026-46120](https://patchblox.com/security/data/cve/CVE-2026-46120.md) | High | bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: n... | 8.8 | 0.0013 | | --- Data as of 2026-11-07T12:40:37Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo