SUSE alert openSUSE-SU-2026:20778-1 (gnutls)

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openSUSE-SU-2026:20778-1: important: Security update for gnutls
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Mon, 25 May 2026 17:51:38 +0200
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<20260525155138.1391DFCF8@maintenance.suse.de>
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Article
openSUSE security update: security update for gnutls
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:20778-1
Rating: important
References:

  * bsc#1263704
  * bsc#1263705
  * bsc#1263706
  * bsc#1263707
  * bsc#1263708
  * bsc#1263709
  * bsc#1263710
  * bsc#1263711
  * bsc#1263712
  * bsc#1263713
  * bsc#1263714
  * bsc#1263715
  * bsc#1263716



Cross-References:

  * CVE-2026-33845
  * CVE-2026-33846
  * CVE-2026-3832
  * CVE-2026-3833
  * CVE-2026-42009
  * CVE-2026-42010
  * CVE-2026-42011
  * CVE-2026-42012
  * CVE-2026-42013
  * CVE-2026-42014
  * CVE-2026-42015
  * CVE-2026-5260
  * CVE-2026-5419



CVSS scores:

  * CVE-2026-33845 ( SUSE ): 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  * CVE-2026-33845 ( SUSE ): 8.8 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-33846 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-33846 ( 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-2026-3833 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-3833 ( SUSE ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-42009 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42009 ( 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-2026-42010 ( SUSE ): 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
  * CVE-2026-42010 ( SUSE ): 6.9 CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-42011 ( SUSE ): 4.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2026-42011 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-42013 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
  * CVE-2026-42013 ( SUSE ): 8.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-42014 ( SUSE ): 4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-42014 ( SUSE ): 5.1 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-42015 ( SUSE ): 6.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
  * CVE-2026-42015 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-5260 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-5260 ( SUSE ): 8.2 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-5419 ( SUSE ): 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
  * CVE-2026-5419 ( SUSE ): 6.3 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 13 vulnerabilities and has 13 bug fixes can now be installed.

Description:

This update for gnutls fixes the following issues

- CVE-2026-3832: cert-session: fix multi-entry OCSP revocation bypass (bsc#1263706).
- CVE-2026-3833: x509/name-constraints: compare domain names case-insensitive (bsc#1263707).
- CVE-2026-5260: lib/pkcs11_privkey: guard against overreading on short ciphertexts (bsc#1263715).
- CVE-2026-5419: gnutls_cipher_decrypt3: make PKCS#7 unpadding branch free (bsc#1263716).
- CVE-2026-33845: buffers: switch from end_offset over to frag_length (bsc#1263704).
- CVE-2026-33846: buffers: add more checks to DTLS reassembly (bsc#1263705).
- CVE-2026-42009: lib/buffers: ensure packets have differing sequence numbers (bsc#1263708).
- CVE-2026-42010: lib/auth/rsa_psk: fix binary PSK identity lookup (bsc#1263709).
- CVE-2026-42011: x509/name_constraints: fix intersecting empty constraints (bsc#1263710).
- CVE-2026-42012: x509/hostname-verify: make URI/SRV SAN preclude CN fallback (bsc#1263711).
- CVE-2026-42013: x509: prevent fallback on oversized SAN (bsc#1263712).
- CVE-2026-42014: pkcs11_write: fix UAF and leak in gnutls_pkcs11_token_set_pin (bsc#1263713).
- CVE-2026-42015: x509/pkcs12_bag: fix off-by-one in bag element bounds chec (bsc#1263714).


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-16.0-776=1

Package List:

- openSUSE Leap 16.0:

  gnutls-3.8.10-160000.3.1
  libgnutls-devel-3.8.10-160000.3.1
  libgnutls-devel-doc-3.8.10-160000.3.1
  libgnutls30-3.8.10-160000.3.1
  libgnutlsxx-devel-3.8.10-160000.3.1
  libgnutlsxx30-3.8.10-160000.3.1

References:

  * https://www.suse.com/security/cve/CVE-2026-33845.html
  * https://www.suse.com/security/cve/CVE-2026-33846.html
  * https://www.suse.com/security/cve/CVE-2026-3832.html
  * https://www.suse.com/security/cve/CVE-2026-3833.html
  * https://www.suse.com/security/cve/CVE-2026-42009.html
  * https://www.suse.com/security/cve/CVE-2026-42010.html
  * https://www.suse.com/security/cve/CVE-2026-42011.html
  * https://www.suse.com/security/cve/CVE-2026-42012.html
  * https://www.suse.com/security/cve/CVE-2026-42013.html
  * https://www.suse.com/security/cve/CVE-2026-42014.html
  * https://www.suse.com/security/cve/CVE-2026-42015.html
  * https://www.suse.com/security/cve/CVE-2026-5260.html
  * https://www.suse.com/security/cve/CVE-2026-5419.html