# CVE-2025-21090: intel-microcode: Missing reference to active allocated resource for some Intel(R) Xeon(R)processors may allow an authenticated user to...

CVE-2025-21090 is fixed in 2 products on 1 platform, first by intel-microcode 3.20250812.0ubuntu0.18.04.1+esm1, released August 12, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-21090
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 12, 2025

## Description

Missing reference to active allocated resource for some Intel(R) Xeon(R)processors may allow an authenticated user to potentially enable denial ofservice via local access.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | intel-microcode Debian 12.15 (bookworm) | 3.20250812.1~deb12u1 | [DEBIAN-CVE-2025-21090](https://patchblox.com/security/data/fix/linux/debian-cve-2025-21090.md) | Aug 12, 2025 |
| Linux | intel-microcode Debian 13.5 (trixie) | 3.20250812.1~deb13u1 | [DEBIAN-CVE-2025-21090](https://patchblox.com/security/data/fix/linux/debian-cve-2025-21090.md) | Aug 12, 2025 |
| Linux | intel-microcode Debian 14 | 3.20250812.1 | [DEBIAN-CVE-2025-21090](https://patchblox.com/security/data/fix/linux/debian-cve-2025-21090.md) | Aug 12, 2025 |
| Linux | intel-microcode Ubuntu 18.04.6 LTS (bionic) | 3.20250812.0ubuntu0.18.04.1+esm1 | [intel-microcode 3.20250812.0ubuntu0.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-intel-microcode-3.20250812.0ubuntu0.18.04.1-esm1.md) | Aug 12, 2025 |
| Linux | intel-microcode Ubuntu 20.04 LTS (focal) | 3.20250812.0ubuntu0.20.04.1+esm1 | [intel-microcode 3.20250812.0ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-intel-microcode-3.20250812.0ubuntu0.20.04.1-esm1.md) | Aug 12, 2025 |
| Linux | intel-microcode Ubuntu 22.04.1 LTS (jammy) | 3.20250812.0ubuntu0.22.04.1 | [intel-microcode 3.20250812.0ubuntu0.22.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-intel-microcode-3.20250812.0ubuntu0.22.04.1.md) | Aug 12, 2025 |
| Linux | intel-microcode Ubuntu 24.04.5 LTS (noble) | 3.20250812.0ubuntu0.24.04.1 | [intel-microcode 3.20250812.0ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-intel-microcode-3.20250812.0ubuntu0.24.04.1.md) | Aug 12, 2025 |
| Linux | intel-microcode Ubuntu 25.04 (plucky) | 3.20250812.0ubuntu0.25.04.1 | [intel-microcode 3.20250812.0ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-intel-microcode-3.20250812.0ubuntu0.25.04.1.md) | Jan 16, 2026 |
| Linux | intel-microcode Ubuntu 25.10 (questing) | 3.20250812.0ubuntu0.25.10.1 | [intel-microcode 3.20250812.0ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-intel-microcode-3.20250812.0ubuntu0.25.10.1.md) | Aug 12, 2025 |
| Linux | microcode_ctl amzn 2023 | 2:2.1-53.amzn2023.0.13 | [ALAS2023-2025-1190](https://patchblox.com/security/data/fix/linux/alas2023-2025-1190.md) | Sep 10, 2025 |

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Data as of 2026-11-08T06:59:42Z 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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