# ELSA-2026-89748: libreswan security update

ELSA-2026-89748, released November 7, 2026, fixes 3 CVEs in libreswan (version 0:4.15-11.0.1.el9_8). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2026-89748
- Platform: Linux
- Released: Nov 7, 2026
- Priority: High (Closes CVE-2026-77206, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2026-89748.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libreswan](https://patchblox.com/security/data/product/linux/libreswan.md) | ol 9 | 0:4.15-11.0.1.el9_8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-77206](https://patchblox.com/security/data/cve/CVE-2026-77206.md) | High | IKEv2 pre-authentication Null Pointer Dereference in EAP code | 7.5 | 0.0066 |  |
| [CVE-2026-77207](https://patchblox.com/security/data/cve/CVE-2026-77207.md) | High | Null Pointer Dereference in PKCS#7 bundle with no certificates | 7.5 | 0.0046 |  |
| [CVE-2026-94453](https://patchblox.com/security/data/cve/CVE-2026-94453.md) | High | IKEv2 Use-After-Free bug when using IKE-over-TCP | 7.5 | 0.0045 |  |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo