openSUSE-SU-2026:21474-1: moderate: Security update for s2n

openSUSE security update: security update for s2n
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Announcement ID: openSUSE-SU-2026:21474-1
Rating: moderate
References:

  * bsc#1272352



Cross-References:

  * CVE-2026-16317
  * CVE-2026-16318



CVSS scores:

  * CVE-2026-16317 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
  * CVE-2026-16318 ( SUSE ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected Products:

         openSUSE Leap 16.0

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An update that solves 2 vulnerabilities and has one bug fix can now be installed.

Description:

This update for s2n fixes the following issues:

Changes in s2n:

- CVE-2026-16318: Denial of Service due to memory leak in QUIC
  transport parameters handler (bsc#1272352)
- CVE-2026-16317: man-in-the-middle attack can silently discard
  individual application data records


Patch instructions:

   To install this openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-openSUSE_Backports_SLE-16.0__patchinfo.20260728100207342874.93181000773252=1

Package List:

- openSUSE Leap 16.0:

  libs2n0unstable-1.5.1-bp160.2.1
  s2n-devel-1.5.1-bp160.2.1

References:

  * https://www.suse.com/security/cve/CVE-2026-16317.html
  * https://www.suse.com/security/cve/CVE-2026-16318.html