# RHSA-2025:21776: Security update for 2 packages

RHSA-2025:21776, released November 19, 2025, 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-2025-21776
- Platform: Linux
- Released: Nov 19, 2025
- Priority: High (Closes CVE-2022-23990, high severity)
- CVEs: 4, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:21776

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [expat](https://patchblox.com/security/data/product/linux/expat.md) | RHEL 8 | 0:2.5.0-1.el8_10 |
| [expat-devel](https://patchblox.com/security/data/product/linux/expat-devel.md) | RHEL 8 | 0:2.5.0-1.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2022-23990](https://patchblox.com/security/data/cve/CVE-2022-23990.md) | High | expat: Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. | 9.8 | 0.0469 |  |
| [CVE-2024-28757](https://patchblox.com/security/data/cve/CVE-2024-28757.md) | High | expat: Expat is a C library for parsing XML documents.  Security Fix(es):  * expat: libexpat in Expat allows attackers to tr... | 7.5 | 0.0201 |  |
| [CVE-2025-59375](https://patchblox.com/security/data/cve/CVE-2025-59375.md) | High | libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing. | 8.1 | 0.0138 |  |
| [CVE-2013-0340](https://patchblox.com/security/data/cve/CVE-2013-0340.md) | Routine | Python 3.8 and 3 others: expat before version 2.4.0 does not properly handle entities expansion unless an application developer… | 6.8 | 0.1943 |  |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo