# RHSA-2026:87374: Security update for 12 packages

RHSA-2026:87374, released October 24, 2026, fixes 7 CVEs across 12 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-87374
- Platform: Linux
- Released: Oct 24, 2026
- Priority: High (Closes CVE-2026-80590, high severity)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:87374

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kernel-rt](https://patchblox.com/security/data/product/linux/kernel-rt.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-core](https://patchblox.com/security/data/product/linux/kernel-rt-core.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug](https://patchblox.com/security/data/product/linux/kernel-rt-debug.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug-core](https://patchblox.com/security/data/product/linux/kernel-rt-debug-core.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug-devel](https://patchblox.com/security/data/product/linux/kernel-rt-debug-devel.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-debug-kvm.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug-modules](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-debug-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-debug-modules-extra.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-devel](https://patchblox.com/security/data/product/linux/kernel-rt-devel.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-kvm](https://patchblox.com/security/data/product/linux/kernel-rt-kvm.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-modules](https://patchblox.com/security/data/product/linux/kernel-rt-modules.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |
| [kernel-rt-modules-extra](https://patchblox.com/security/data/product/linux/kernel-rt-modules-extra.md) | RHEL 8 | 0:4.18.0-553.177.1.rt7.518.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-80590](https://patchblox.com/security/data/cve/CVE-2026-80590.md) | High | inet: frags: strip GSO state from fragments before reassembly | 8.8 | 0.0058 |  |
| [CVE-2026-64572](https://patchblox.com/security/data/cve/CVE-2026-64572.md) | High | ipv4: fib: free fib_alias with kfree_rcu() on insert error path | 8.8 | 0.0020 |  |
| [CVE-2026-68202](https://patchblox.com/security/data/cve/CVE-2026-68202.md) | High | ALSA: seq: close a re-opened queue timer in the destructor | 7.8 | 0.0018 |  |
| [CVE-2026-89777](https://patchblox.com/security/data/cve/CVE-2026-89777.md) | High | vfio/pci: clear vdev->msi_perm after freeing it on init failure | 8.8 | 0.0016 |  |
| [CVE-2026-80536](https://patchblox.com/security/data/cve/CVE-2026-80536.md) | High | xfs: bounds-check buffer log item's dirty bitmap | 8.4 | 0.0014 |  |
| [CVE-2026-64114](https://patchblox.com/security/data/cve/CVE-2026-64114.md) | High | kernel: The kernel packages contain the Linux kernel, the core of any Linux operating system | 8.8 | 0.0014 |  |
| [CVE-2026-64266](https://patchblox.com/security/data/cve/CVE-2026-64266.md) | High | fuse: re-lock request before returning from fuse_ref_folio() | 7.8 | 0.0013 |  |

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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