Security update for strongswan

Announcement ID:	SUSE-SU-2026:2197-1
Release Date:	2026-06-01T07:45:03Z
Rating:	important
References:	bsc#1261705 bsc#1261706 bsc#1261708 bsc#1261712 bsc#1261717 bsc#1261720
Cross-References:	CVE-2026-35328 CVE-2026-35329 CVE-2026-35330 CVE-2026-35332 CVE-2026-35333 CVE-2026-35334
CVSS scores:	CVE-2026-35328 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-35328 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-35329 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-35329 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-35330 ( SUSE ): 9.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-35330 ( SUSE ): 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-35332 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-35332 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-35333 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-35333 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-35334 ( SUSE ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVE-2026-35334 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:	openSUSE Leap 15.6 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server 15 SP6 LTSS SUSE Linux Enterprise Server for SAP Applications 15 SP6

An update that solves six vulnerabilities can now be installed.

Description:

This update for strongswan fixes the following issues:

• CVE-2026-35328: infinite loop when handling supported versions TLS extension (bsc#1261712).
• CVE-2026-35329: null pointer dereference when processing padding in PKCS#7 (bsc#1261717).
• CVE-2026-35330: integer underflow when handling EAP-SIM/AKA attributes (bsc#1261705).
• CVE-2026-35332: null pointer dereference when handling ECDH public value in TLS (bsc#1261708).
• CVE-2026-35333: integer underflow when handling RADIUS attributes (bsc#1261706).
• CVE-2026-35334: null pointer dereference in RSA decryption (bsc#1261720).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• openSUSE Leap 15.6
  zypper in -t patch SUSE-2026-2197=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2197=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2197=1

Package List:

• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586)
  • strongswan-debuginfo-5.9.12-150600.3.16.1
  • strongswan-mysql-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-5.9.12-150600.3.16.1
  • strongswan-5.9.12-150600.3.16.1
  • strongswan-sqlite-debuginfo-5.9.12-150600.3.16.1
  • strongswan-hmac-5.9.12-150600.3.16.1
  • strongswan-libs0-5.9.12-150600.3.16.1
  • strongswan-libs0-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-debuginfo-5.9.12-150600.3.16.1
  • strongswan-sqlite-5.9.12-150600.3.16.1
  • strongswan-nm-5.9.12-150600.3.16.1
  • strongswan-nm-debuginfo-5.9.12-150600.3.16.1
  • strongswan-debugsource-5.9.12-150600.3.16.1
  • strongswan-mysql-5.9.12-150600.3.16.1
• openSUSE Leap 15.6 (noarch)
  • strongswan-doc-5.9.12-150600.3.16.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • strongswan-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-5.9.12-150600.3.16.1
  • strongswan-5.9.12-150600.3.16.1
  • strongswan-hmac-5.9.12-150600.3.16.1
  • strongswan-libs0-5.9.12-150600.3.16.1
  • strongswan-libs0-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-debuginfo-5.9.12-150600.3.16.1
  • strongswan-debugsource-5.9.12-150600.3.16.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (noarch)
  • strongswan-doc-5.9.12-150600.3.16.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • strongswan-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-5.9.12-150600.3.16.1
  • strongswan-5.9.12-150600.3.16.1
  • strongswan-hmac-5.9.12-150600.3.16.1
  • strongswan-libs0-5.9.12-150600.3.16.1
  • strongswan-libs0-debuginfo-5.9.12-150600.3.16.1
  • strongswan-ipsec-debuginfo-5.9.12-150600.3.16.1
  • strongswan-debugsource-5.9.12-150600.3.16.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (noarch)
  • strongswan-doc-5.9.12-150600.3.16.1

References:

• https://www.suse.com/security/cve/CVE-2026-35328.html
• https://www.suse.com/security/cve/CVE-2026-35329.html
• https://www.suse.com/security/cve/CVE-2026-35330.html
• https://www.suse.com/security/cve/CVE-2026-35332.html
• https://www.suse.com/security/cve/CVE-2026-35333.html
• https://www.suse.com/security/cve/CVE-2026-35334.html
• https://bugzilla.suse.com/show_bug.cgi?id=1261705
• https://bugzilla.suse.com/show_bug.cgi?id=1261706
• https://bugzilla.suse.com/show_bug.cgi?id=1261708
• https://bugzilla.suse.com/show_bug.cgi?id=1261712
• https://bugzilla.suse.com/show_bug.cgi?id=1261717
• https://bugzilla.suse.com/show_bug.cgi?id=1261720