# CVE-2026-77207: Null Pointer Dereference in PKCS#7 bundle with no certificates CVE-2026-77207 is fixed in 4 products on 1 platform, first by RHSA-2026:89923, released October 27, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-77207 - Priority: High - CVSS: 7.5 (Important) - EPSS: 0.0046 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 5, 2026 - Weakness: NULL Pointer Dereference - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77207 ## Description Libreswan is an implementation of IPsec and IKE for Linux. IPsec is the Internet Protocol Security and uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks such as virtual private network (VPN). Security Fix(es): * libreswan: IKEv2 Use-After-Free bug when using IKE-over-TCP (CVE-2026-94453) * libreswan: IKEv2 pre-authentication Null Pointer deref in EAP code (CVE-2026-77206) * libreswan: Null Pointer Dereference in PKCS#7 bundle with no CERTS (CVE-2026-77207) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | libreswan RHEL 10 | 5.3.3-1.el10_2 | [RHSA-2026:89923](https://patchblox.com/security/data/fix/linux/rhsa-2026-89923.md) | Oct 27, 2026 | | Linux | libreswan RHEL 8 | 0:4.12-2.el8_10.7 | [RHSA-2026:90492](https://patchblox.com/security/data/fix/linux/rhsa-2026-90492.md) | Oct 29, 2026 | | Linux | libreswan RHEL 9 | 0:4.15-11.el9_8 | [RHSA-2026:89748](https://patchblox.com/security/data/fix/linux/rhsa-2026-89748.md) | Oct 27, 2026 | | Linux | libreswan almalinux 10 | 5.3.3-1.el10_2 | [ALSA-2026:89923](https://patchblox.com/security/data/fix/linux/alsa-2026-89923.md) | Nov 7, 2026 | | Linux | libreswan almalinux 8 | 4.12-2.el8_10.7 | [ALSA-2026:90492](https://patchblox.com/security/data/fix/linux/alsa-2026-90492.md) | Nov 7, 2026 | | Linux | libreswan almalinux 9 | 4.15-11.el9_8 | [ALSA-2026:89748](https://patchblox.com/security/data/fix/linux/alsa-2026-89748.md) | Nov 7, 2026 | | Linux | libreswan amzn 2023 | 4.12-3.amzn2023.0.4 | [ALAS2023-2026-3253](https://patchblox.com/security/data/fix/linux/alas2023-2026-3253.md) | Nov 7, 2026 | | Linux | libreswan ol 10 | 0:5.3.3-1.0.1.el10_2 | [ELSA-2026-89923](https://patchblox.com/security/data/fix/linux/elsa-2026-89923.md) | Nov 7, 2026 | | Linux | libreswan ol 8 | 0:4.12-2.0.1.el8_10.7 | [ELSA-2026-90492](https://patchblox.com/security/data/fix/linux/elsa-2026-90492.md) | Nov 7, 2026 | | Linux | libreswan ol 9 | 0:4.15-11.0.1.el9_8 | [ELSA-2026-89748](https://patchblox.com/security/data/fix/linux/elsa-2026-89748.md) | Nov 7, 2026 | | Linux | libreswan rocky 10 | 0:5.3.3-1.el10_2 | [RLSA-2026:89923](https://patchblox.com/security/data/fix/linux/rlsa-2026-89923.md) | Nov 7, 2026 | | Linux | libreswan rocky 8 | 0:4.12-2.el8_10.7 | [RLSA-2026:90492](https://patchblox.com/security/data/fix/linux/rlsa-2026-90492.md) | Nov 7, 2026 | | Linux | libreswan rocky 9 | 0:4.15-11.el9_8 | [RLSA-2026:89748](https://patchblox.com/security/data/fix/linux/rlsa-2026-89748.md) | Nov 7, 2026 | | Linux | libreswan-debuginfo amzn 2023 | 4.12-3.amzn2023.0.4 | [ALAS2023-2026-3253](https://patchblox.com/security/data/fix/linux/alas2023-2026-3253.md) | Nov 7, 2026 | | Linux | libreswan-debugsource amzn 2023 | 4.12-3.amzn2023.0.4 | [ALAS2023-2026-3253](https://patchblox.com/security/data/fix/linux/alas2023-2026-3253.md) | Nov 7, 2026 | | Linux | libreswan-minimal almalinux 10 | 5.3.3-1.el10_2 | [ALSA-2026:89923](https://patchblox.com/security/data/fix/linux/alsa-2026-89923.md) | Nov 7, 2026 | | Linux | libreswan-minimal ol 10 | 0:5.3.3-1.0.1.el10_2 | [ELSA-2026-89923](https://patchblox.com/security/data/fix/linux/elsa-2026-89923.md) | Nov 7, 2026 | --- Data as of 2026-11-08T06:59:42Z 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.