# RHSA-2026:39893: Security update for 8 packages

RHSA-2026:39893, released July 18, 2026, fixes 1 CVE across 8 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2026-39893
- Platform: Linux
- Released: Jul 18, 2026
- Priority: High (Closes CVE-2026-15308, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2026:39893

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [python3.12](https://patchblox.com/security/data/product/linux/python3.12.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-debug](https://patchblox.com/security/data/product/linux/python3.12-debug.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-devel](https://patchblox.com/security/data/product/linux/python3.12-devel.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-idle](https://patchblox.com/security/data/product/linux/python3.12-idle.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-libs](https://patchblox.com/security/data/product/linux/python3.12-libs.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-rpm-macros](https://patchblox.com/security/data/product/linux/python3.12-rpm-macros.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-test](https://patchblox.com/security/data/product/linux/python3.12-test.md) | RHEL 8 | 0:3.12.13-3.el8_10 |
| [python3.12-tkinter](https://patchblox.com/security/data/product/linux/python3.12-tkinter.md) | RHEL 8 | 0:3.12.13-3.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-15308](https://patchblox.com/security/data/cve/CVE-2026-15308.md) | High | Incremental HTMLParser feed() allows CPU-exhaustion DoS via repeated unterminated markup declarations | 8.7 | 0.0064 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo