# ALAS2023-2026-1952: amazon-ssm-agent security update

ALAS2023-2026-1952, released July 20, 2026, fixes 9 CVEs in amazon-ssm-agent (version 3.3.4624.0-1.amzn2023). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alas2023-2026-1952
- Platform: Linux
- Released: Jul 20, 2026
- Priority: High (Closes CVE-2026-42508, high severity)
- CVEs: 9, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-1952.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [amazon-ssm-agent](https://patchblox.com/security/data/product/linux/amazon-ssm-agent.md) | amzn 2023 | 3.3.4624.0-1.amzn2023 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-42508](https://patchblox.com/security/data/cve/CVE-2026-42508.md) | High | Invoking  auth bypass via unenforced @revoked status in golang.org/x/crypto/ssh/knownhosts | 9.1 | 0.0691 |  |
| [CVE-2026-39830](https://patchblox.com/security/data/cve/CVE-2026-39830.md) | High | Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh | 9.1 | 0.0068 |  |
| [CVE-2026-39834](https://patchblox.com/security/data/cve/CVE-2026-39834.md) | High | Invoking  infinite loop on large channel writes in golang.org/x/crypto/ssh | 9.1 | 0.0060 |  |
| [CVE-2026-39835](https://patchblox.com/security/data/cve/CVE-2026-39835.md) | High | Invoking  server panic during CheckHostKey/Authenticate in golang.org/x/crypto/ssh | 8.7 | 0.0050 |  |
| [CVE-2026-39831](https://patchblox.com/security/data/cve/CVE-2026-39831.md) | High | Invoking  bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh | 9.1 | 0.0048 |  |
| [CVE-2026-46597](https://patchblox.com/security/data/cve/CVE-2026-46597.md) | High | Invoking  byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh | 7.5 | 0.0047 |  |
| [CVE-2026-39829](https://patchblox.com/security/data/cve/CVE-2026-39829.md) | High | Invoking  pathological RSA/DSA parameters may cause DoS in golang.org/x/crypto/ssh | 8.7 | 0.0047 |  |
| [CVE-2026-41506](https://patchblox.com/security/data/cve/CVE-2026-41506.md) | High | golang-github-go-git-go-git: go-git is an extensible git implementation library written in pure Go | 7.4 | 0.0026 |  |
| [CVE-2026-39827](https://patchblox.com/security/data/cve/CVE-2026-39827.md) | Routine | Invoking  memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh | 6.5 | 0.0028 |  |

---

Data as of 2026-11-09T19:38:12Z 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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