# RHSA-2026:81452: Security update for 2 packages

RHSA-2026:81452, released October 13, 2026, fixes 4 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-81452
- Platform: Linux
- Released: Oct 13, 2026
- Priority: High (Closes CVE-2026-52933, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:81452

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [kpatch-patch-5_14_0-687_10_1](https://patchblox.com/security/data/product/linux/kpatch-patch-5-14-0-687-10-1.md) | RHEL 9 | 0:1-10.el9_8 |
| [kpatch-patch-5_14_0-687_42_1](https://patchblox.com/security/data/product/linux/kpatch-patch-5-14-0-687-42-1.md) | RHEL 9 | 0:1-1.el9_8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-52933](https://patchblox.com/security/data/cve/CVE-2026-52933.md) | High | io_uring/poll: fix signed comparison in io_poll_get_ownership() | 7.8 | 0.0015 |  |
| [CVE-2026-46181](https://patchblox.com/security/data/cve/CVE-2026-46181.md) | High | RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() | 8.8 | 0.0014 |  |
| [CVE-2026-46176](https://patchblox.com/security/data/cve/CVE-2026-46176.md) | High | RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() | 7.8 | 0.0014 |  |
| [CVE-2026-64002](https://patchblox.com/security/data/cve/CVE-2026-64002.md) | High | kernel: In the Linux kernel, the following vulnerability has been resolved: ipv4: free net->ipv4.sysctl_local_reserved_ports... | 8.8 | 0.0013 |  |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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