# ALAS2023-2026-2025: amazon-cloudwatch-agent security update

ALAS2023-2026-2025, released August 3, 2026, fixes 12 CVEs in amazon-cloudwatch-agent (version 1.300069.1-1.amzn2023). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alas2023-2026-2025
- Platform: Linux
- Released: Aug 3, 2026
- Priority: High (Closes CVE-2026-39832, high severity)
- CVEs: 12, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://alas.aws.amazon.com/AL2023/ALAS-2026-2025.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [amazon-cloudwatch-agent](https://patchblox.com/security/data/product/linux/amazon-cloudwatch-agent.md) | amzn 2023 | 1.300069.1-1.amzn2023 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-39832](https://patchblox.com/security/data/cve/CVE-2026-39832.md) | High | Invoking  agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent | 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-2026-27145](https://patchblox.com/security/data/cve/CVE-2026-27145.md) | High | Inefficient candidate hostname parsing in crypto/x509 | 8.2 | 0.0059 |  |
| [CVE-2026-42504](https://patchblox.com/security/data/cve/CVE-2026-42504.md) | High | Quadratic complexity in WordDecoder.DecodeHeader in mime | 8.8 | 0.0056 |  |
| [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-2026-46597](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-2026-39828](https://patchblox.com/security/data/cve/CVE-2026-39828.md) | High | Invoking  bypass of certificate restrictions in golang.org/x/crypto/ssh | 8.8 | 0.0037 |  |
| [CVE-2026-39822](https://patchblox.com/security/data/cve/CVE-2026-39822.md) | High | Root escape via symlink plus trailing slash in os | 8.2 | 0.0023 |  |
| [CVE-2026-46598](https://patchblox.com/security/data/cve/CVE-2026-46598.md) | Routine | Invoking  pathological inputs can lead to client panic in golang.org/x/crypto/ssh/agent | 5.3 | 0.0041 |  |
| [CVE-2026-42505](https://patchblox.com/security/data/cve/CVE-2026-42505.md) | Routine | Invoking Encrypted Client Hello privacy leak in crypto/tls | 5.3 | 0.0038 |  |
| [CVE-2026-42507](https://patchblox.com/security/data/cve/CVE-2026-42507.md) | Routine | Arbitrary inputs are included in errors without any escaping in net/textproto | 5.3 | 0.0037 |  |
| [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 |  |

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Data as of 2026-11-10T07:50:38Z 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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