# RHSA-2026:83157: Security update for 23 packages RHSA-2026:83157, released October 16, 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-2026-83157 - Platform: Linux - Released: Oct 16, 2026 - Priority: Urgent (Closes CVE-2026-89526, rated Critical) - CVEs: 9, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://access.redhat.com/errata/RHSA-2026:83157 ## Applies to | Product | Release | Fixed in | |---|---|---| | [bpftool](https://patchblox.com/security/data/product/linux/bpftool.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel](https://patchblox.com/security/data/product/linux/kernel.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-abi-stablelists](https://patchblox.com/security/data/product/linux/kernel-abi-stablelists.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-core](https://patchblox.com/security/data/product/linux/kernel-core.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-debug](https://patchblox.com/security/data/product/linux/kernel-debug.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-debug-core](https://patchblox.com/security/data/product/linux/kernel-debug-core.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-debug-devel](https://patchblox.com/security/data/product/linux/kernel-debug-devel.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-debug-modules](https://patchblox.com/security/data/product/linux/kernel-debug-modules.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-devel](https://patchblox.com/security/data/product/linux/kernel-devel.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-doc](https://patchblox.com/security/data/product/linux/kernel-doc.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-modules](https://patchblox.com/security/data/product/linux/kernel-modules.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-modules-extra](https://patchblox.com/security/data/product/linux/kernel-modules-extra.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-tools](https://patchblox.com/security/data/product/linux/kernel-tools.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-tools-libs](https://patchblox.com/security/data/product/linux/kernel-tools-libs.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-tools-libs-devel](https://patchblox.com/security/data/product/linux/kernel-tools-libs-devel.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-zfcpdump](https://patchblox.com/security/data/product/linux/kernel-zfcpdump.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-zfcpdump-core](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-core.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-zfcpdump-devel](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-devel.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-zfcpdump-modules](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [kernel-zfcpdump-modules-extra](https://patchblox.com/security/data/product/linux/kernel-zfcpdump-modules-extra.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [perf](https://patchblox.com/security/data/product/linux/perf.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | | [python3-perf](https://patchblox.com/security/data/product/linux/python3-perf.md) | RHEL 8 | 0:4.18.0-553.174.1.el8_10 | ## CVEs this fix closes | CVE | Priority | Title | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2026-89526](https://patchblox.com/security/data/cve/CVE-2026-89526.md) | Urgent | svcrdma: Validate Read chunk positions before reconstruction | 9.8 | 0.0068 | | | [CVE-2026-90036](https://patchblox.com/security/data/cve/CVE-2026-90036.md) | Urgent | NFSD: Prevent client use-after-free during blocked-lock reaping | 9.8 | 0.0048 | | | [CVE-2026-68377](https://patchblox.com/security/data/cve/CVE-2026-68377.md) | Urgent | net/sched: act_tunnel_key: Defer dst_release to RCU callback | 9.8 | 0.0013 | | | [CVE-2026-93228](https://patchblox.com/security/data/cve/CVE-2026-93228.md) | High | svcrdma: Reject Write/Reply chunks with segcount 0 | 9.1 | 0.0050 | | | [CVE-2026-74705](https://patchblox.com/security/data/cve/CVE-2026-74705.md) | High | udp: fix potential use-after-free in tunnel segmentation | 10.0 | 0.0050 | | | [CVE-2026-72262](https://patchblox.com/security/data/cve/CVE-2026-72262.md) | High | linux: In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix heap overflow in by... | 8.8 | 0.0018 | | | [CVE-2026-93262](https://patchblox.com/security/data/cve/CVE-2026-93262.md) | High | md/raid5-ppl: fix use-after-free in ppl_do_flush() | 8.8 | 0.0015 | | | [CVE-2026-74641](https://patchblox.com/security/data/cve/CVE-2026-74641.md) | High | ALSA: usx2y: bound the hwdep mmap fault offset | 8.8 | 0.0013 | | | [CVE-2026-74583](https://patchblox.com/security/data/cve/CVE-2026-74583.md) | High | net/sched: cls_route: fix fastmap use-after-free on filter | 8.8 | 0.0012 | | --- 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