# SUSE-SU-2026:3541-1: libssh2_org security update

SUSE-SU-2026:3541-1, released August 10, 2026, fixes 8 CVEs in libssh2_org (version 1.11.0-150600.20.6.1). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/suse-su-2026-3541-1
- Platform: Linux
- Released: Aug 10, 2026
- Priority: High (Closes CVE-2026-66033, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/SUSE-SU-2026:3541-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libssh2_org](https://patchblox.com/security/data/product/linux/libssh2-org.md) | sles 15.6 | 1.11.0-150600.20.6.1 |
| [libssh2_org](https://patchblox.com/security/data/product/linux/libssh2-org.md) | sles 15.7 | 1.11.0-150600.20.6.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-66033](https://patchblox.com/security/data/cve/CVE-2026-66033.md) | High | libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation | 7.5 | 0.0058 |  |
| [CVE-2026-66035](https://patchblox.com/security/data/cve/CVE-2026-66035.md) | High | libssh2 Heap Buffer Overflow via ETM Cipher Negotiation | 7.5 | 0.0047 |  |
| [CVE-2026-7598](https://patchblox.com/security/data/cve/CVE-2026-7598.md) | High | libssh2 userauth.c userauth_password integer overflow | 7.3 | 0.0047 |  |
| [CVE-2026-66032](https://patchblox.com/security/data/cve/CVE-2026-66032.md) | High | libssh2 Double-Free Heap Corruption via sftp_open() | 8.8 | 0.0045 |  |
| [CVE-2026-58050](https://patchblox.com/security/data/cve/CVE-2026-58050.md) | High | libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation | 7.5 | 0.0044 |  |
| [CVE-2026-66034](https://patchblox.com/security/data/cve/CVE-2026-66034.md) | High | libssh2 Heap Out-of-Bounds Read via publickey subsystem | 7.5 | 0.0040 |  |
| [CVE-2025-15661](https://patchblox.com/security/data/cve/CVE-2025-15661.md) | Routine | libssh2 - Heap Buffer Over-read via sftp_symlink() in sftp.c | 6.5 | 0.0065 |  |
| [CVE-2026-58051](https://patchblox.com/security/data/cve/CVE-2026-58051.md) | Routine | libssh2: libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before par... | n/a | 0.0028 |  |

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Data as of 2026-11-10T20:03:11Z 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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