# RHSA-2026:63013: Security update for 12 packages RHSA-2026:63013, released September 13, 2026, fixes 14 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/fix/linux/rhsa-2026-63013 - Platform: Linux - Released: Sep 13, 2026 - Priority: Urgent (Closes CVE-2026-63800, rated Critical) - CVEs: 14, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://access.redhat.com/errata/RHSA-2026:63013 ## Applies to | Product | Release | Fixed in | |---|---|---| | [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-debug-kvm.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-kvm.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | | [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | RHEL 8 | 0:4.18.0-553.159.1.rt7.500.el8_10 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-63800](https://patchblox.com/security/data/cve/CVE-2026-63800.md) | Urgent | pNFS: Fix use-after-free in pnfs_update_layout() | 9.8 | 0.0064 | | | [CVE-2026-64268](https://patchblox.com/security/data/cve/CVE-2026-64268.md) | High | RDMA/siw: bound Read Response placement to the RREAD length | 9.8 | 0.0071 | | | [CVE-2026-53399](https://patchblox.com/security/data/cve/CVE-2026-53399.md) | High | nfsd: release layout stid on setlease failure | 9.8 | 0.0066 | | | [CVE-2026-53392](https://patchblox.com/security/data/cve/CVE-2026-53392.md) | High | NFSv4/flexfiles: reject zero filehandle version count | 8.8 | 0.0053 | | | [CVE-2026-53397](https://patchblox.com/security/data/cve/CVE-2026-53397.md) | High | nfsd: fix posix_acl leak on SETACL decode failure | 8.8 | 0.0053 | | | [CVE-2026-53391](https://patchblox.com/security/data/cve/CVE-2026-53391.md) | High | NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr | 8.8 | 0.0052 | | | [CVE-2026-74581](https://patchblox.com/security/data/cve/CVE-2026-74581.md) | High | net: ipv6: clear suppressed fib6 rule result | 9.8 | 0.0042 | | | [CVE-2026-68480](https://patchblox.com/security/data/cve/CVE-2026-68480.md) | High | x86/bugs: Make Safe-RET robust against interrupt injection | 8.8 | 0.0023 | | | [CVE-2025-71132](https://patchblox.com/security/data/cve/CVE-2025-71132.md) | High | smc91x: fix broken irq-context in PREEMPT_RT | 8.8 | 0.0022 | | | [CVE-2024-57849](https://patchblox.com/security/data/cve/CVE-2024-57849.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: s390/cpum_sf: Handle CPU hotplug remove during s... | 8.8 | 0.0021 | | | [CVE-2026-64298](https://patchblox.com/security/data/cve/CVE-2026-64298.md) | High | NFSv4: include MAY_WRITE in open permission mask for O_TRUNC | 8.8 | 0.0015 | | | [CVE-2026-64018](https://patchblox.com/security/data/cve/CVE-2026-64018.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-... | 9.3 | 0.0014 | | | [CVE-2026-45970](https://patchblox.com/security/data/cve/CVE-2026-45970.md) | High | kernel-rt-devel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.8 | 0.0013 | | | [CVE-2026-53185](https://patchblox.com/security/data/cve/CVE-2026-53185.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: k... | 8.8 | 0.0011 | | --- 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