# CVE-2024-36315: amd64-microcode: Improper enforcement of the LFENCE serialization property may allow an attacker to bypass speculation barriers and po...

CVE-2024-36315 is fixed in amd64-microcode on 1 platform, first by amd64-microcode 3.20251202.1ubuntu0.25.10.1, released January 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-36315
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 12, 2026

## Description

Improper enforcement of the LFENCE serialization property may allow an attacker to bypass speculation barriers and potentially disclose sensitive information, potentially resulting in loss of confidentiality.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | amd64-microcode Ubuntu 24.04.5 LTS (noble) | 3.20251202.1ubuntu0.24.04.1 | [amd64-microcode 3.20251202.1ubuntu0.24.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-amd64-microcode-3.20251202.1ubuntu0.24.04.1.md) | May 12, 2026 |
| Linux | amd64-microcode Ubuntu 25.10 (questing) | 3.20251202.1ubuntu0.25.10.1 | [amd64-microcode 3.20251202.1ubuntu0.25.10.1](https://patchblox.com/security/data/fix/linux/ubuntu-questing-amd64-microcode-3.20251202.1ubuntu0.25.10.1.md) | Jan 16, 2026 |
| Linux | amd64-microcode Ubuntu 26.04.1 LTS (resolute) | 3.20251202.1ubuntu1 | [amd64-microcode 3.20251202.1ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-amd64-microcode-3.20251202.1ubuntu1.md) | May 12, 2026 |

---

Data as of 2026-11-09T13:31:49Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.