CVE-Katalog

CVE-2026-2673

OpenSSL vulnerabilities

[CVE-Katalog]

Schweregrad
High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.51% · Oct 22, 2026

Issue summary: An OpenSSL TLS 1.3 server may fail to negotiate the expected preferred key exchange group when its key exchange group configuration includes the default by using the 'DEFAULT' keyword. Impact summary: A less preferred key exchange may be used even when a more preferred group is supported by both client and server, if the group was not included among the client's initial predicated keyshares. This will sometimes be the case with the new hybrid post-quantum groups, if the client chooses to defer their use until specifically requested by the server. If an OpenSSL TLS 1.3 server's configuration uses the 'DEFAULT' keyword to interpolate the built-in default group list into its own configuration, perhaps adding or removing specific elements, then an implementation defect causes the 'DEFAULT' list to lose its 'tuple' structure, and all server-supported groups were treated as a single sufficiently secure 'tuple', with the server not sending a Hello Retry Request (HRR) even when a group in a more preferred tuple was mutually supported. As a result, the client and server might fail to negotiate a mutually supported post-quantum key agreement group, such as 'X25519MLKEM768', if the client's configuration results in only 'classical' groups (such as 'X25519' being the only ones in the client's initial keyshare prediction). OpenSSL 3.5 and later support a new syntax for selecting the most preferred TLS 1.3 key agreement group on TLS servers. The old syntax had a single 'flat' list of groups, and treated all the supported groups as sufficiently secure. If any of the keyshares predicted by the client were supported by the server the most preferred among these was selected, even if other groups supported by the client, but not included in the list of predicted keyshares would have been more preferred, if included. The new syntax partitions the groups into distinct 'tuples' of roughly equivalent security. Within each tuple the most preferred group included among the client's predicted keyshares is chosen, but if the client supports a group from a more preferred tuple, but did not predict any corresponding keyshares, the server will ask the client to retry the ClientHello (by issuing a Hello Retry Request or HRR) with the most preferred mutually supported group. The above works as expected when the server's configuration uses the built-in default group list, or explicitly defines its own list by directly defining the various desired groups and group 'tuples'. No OpenSSL FIPS modules are affected by this issue, the code in question lies outside the FIPS boundary. OpenSSL 3.6 and 3.5 are vulnerable to this issue. OpenSSL 3.6 users should upgrade to OpenSSL 3.6.2 once it is released. OpenSSL 3.5 users should upgrade to OpenSSL 3.5.6 once it is released. OpenSSL 3.4, 3.3, 3.0, 1.0.2 and 1.1.1 are not affected by this issue.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianopensslsid3.6.5-1fixed
Debianopensslforky3.6.5-1fixed
Debianopenssltrixie3.5.7-1~deb13u2fixed
Debianopenssltrixie-security3.5.7-1~deb13u3fixed
Debianopensslbookworm3.0.20-1~deb12u2not affected
Debianopensslbookworm-security3.0.22-1~deb12u1not affected
Ubuntuopensslnoble3.0.13-0ubuntu3.9fixed
Ubuntulibssl-devnoble3.0.13-0ubuntu3.9fixed
Ubuntulibssl-docnoble3.0.13-0ubuntu3.9fixed
Ubuntulibssl3t64noble3.0.13-0ubuntu3.9fixed
UbuntuopensslnobleNot reportednot affected
Alpineopenssl3.223.5.6-r0fixed
Alpineopenssl3.233.5.6-r0fixed
Alpineopenssl3.243.5.6-r0fixed
Suseopenssl-3linux enterprise server 16.03.5.0-160000.8.1fixed
Suseopenssl-3linux enterprise server for sap applications 16.03.5.0-160000.8.1fixed
Opensuseopenssl-3leap 16.03.5.0-160000.8.1fixed
Suseopenssl-3linux micro 6.23.5.0-160000.8.1fixed
Ubuntuopenssl22.041.1.1l-1ubuntu1vulnerable
Ubuntuopenssl22.043.0.0-1ubuntu1vulnerable
Ubuntuopenssl22.043.0.1-0ubuntu1vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.1vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.2vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.4vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.5vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.6vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.7vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.8vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.9vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.10vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.12vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.13vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.14vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.15vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.16vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.17vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.18vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.19vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.20vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.21vulnerable
Ubuntuopenssl22.043.0.2-0ubuntu1.23fixed
Ubuntuopenssl24.043.0.10-1ubuntu2vulnerable
Ubuntuopenssl24.043.0.10-1ubuntu2.1vulnerable
Ubuntuopenssl24.043.0.10-1ubuntu3vulnerable
Ubuntuopenssl24.043.0.10-1ubuntu4vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu2vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.1vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.2vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.3vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.4vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.5vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.6vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.7vulnerable
Ubuntuopenssl24.043.0.13-0ubuntu3.9fixed
Ubuntuopenssl25.103.4.1-1ubuntu3vulnerable
Ubuntuopenssl25.103.5.0-2ubuntu1vulnerable
Ubuntuopenssl25.103.5.2-1ubuntu1vulnerable
Ubuntuopenssl25.103.5.3-1ubuntu2vulnerable
Ubuntuopenssl25.103.5.3-1ubuntu3vulnerable
Ubuntuopenssl25.103.5.3-1ubuntu3.3fixed
Opensuseopenssl-3leap 16.03.5.0-160000.7.1fixed
Suseopenssl-3linux enterprise server 16.03.5.0-160000.7.1fixed
Suseopenssl-3linux enterprise server for sap applications 16.03.5.0-160000.7.1fixed
Suseopenssl-3linux micro 6.23.5.0-160000.7.1fixed
Opensuseopenssl-3tumbleweed3.5.3-4.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianopensslsourcesid3.6.2-1not yet assignedNot reported[1130650]
Debianopensslsourceforky3.6.2-1not yet assignedNot reported[1130650]
Debianopensslsourcetrixie3.5.5-1~deb13u2not yet assignedNot reported[1130650]
DebianopensslsourcebookwormNot affectedunimportantNot reported[1130650]
Ubuntuopenssldebnoble3.0.13-0ubuntu3.9Not reportedNot reportedNot reported
Ubuntulibssl-devdebnoble3.0.13-0ubuntu3.9Not reportedNot reportedNot reported
Ubuntulibssl-docdebnoble3.0.13-0ubuntu3.9Not reportedNot reportedNot reported
Ubuntulibssl3t64debnoble3.0.13-0ubuntu3.9Not reportedNot reportedNot reported
Alpineopensslapk3.223.5.6-r0Not reportedALPINE-CVE-2026-2673Not reported
Alpineopensslapk3.233.5.6-r0Not reportedALPINE-CVE-2026-2673Not reported
Alpineopensslapk3.243.5.6-r0Not reportedALPINE-CVE-2026-2673Not reported
Suseopenssl-3rpmlinux enterprise server 16.03.5.0-160000.8.1Not reportedSUSE-SU-2026:22315-1Not reported
Suseopenssl-3rpmlinux enterprise server for sap applications 16.03.5.0-160000.8.1Not reportedSUSE-SU-2026:22315-1Not reported
Opensuseopenssl-3rpmleap 16.03.5.0-160000.8.1Not reportedOPENSUSE-SU-2026:21005-1Not reported
Suseopenssl-3rpmlinux micro 6.23.5.0-160000.8.1Not reportedSUSE-SU-2026:22251-1Not reported
Ubuntuopenssldeb22.043.0.2-0ubuntu1.23Not reportedUSN-8155-1Not reported
Ubuntuopenssldeb24.043.0.13-0ubuntu3.9Not reportedUSN-8155-1Not reported
Ubuntuopenssldeb25.103.5.3-1ubuntu3.3Not reportedUSN-8155-1Not reported
Opensuseopenssl-3rpmleap 16.03.5.0-160000.7.1Not reportedOPENSUSE-SU-2026:20525-1Not reported
Suseopenssl-3rpmlinux enterprise server 16.03.5.0-160000.7.1Not reportedSUSE-SU-2026:21186-1Not reported
Suseopenssl-3rpmlinux enterprise server for sap applications 16.03.5.0-160000.7.1Not reportedSUSE-SU-2026:21186-1Not reported
Suseopenssl-3rpmlinux micro 6.23.5.0-160000.7.1Not reportedSUSE-SU-2026:21107-1Not reported
Opensuseopenssl-3rpmtumbleweed3.5.3-4.1Not reportedOPENSUSE-SU-2026:10533-1Not reported

[Debian bug #1130650]

OpenFactory catalog packages

[openSUSE Tumbleweed]

  • [libopenssl3]Unbekannt

    Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • [openssl-3-doc]Unbekannt

    Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · noarch · tumbleweed

      Unbekannt · Behoben: 3.5.3-4.1

      Version impact unknown

      usn · openssl-3 · opensuse · tumbleweed

  • [openssl-3]Behoben

    Quellpaket: [openssl-3]

    Details (1)
    • 3.5.3-8.1 · x86_64 · tumbleweed

      Behoben · Behoben: 3.5.3-4.1

      usn · openssl-3 · opensuse · tumbleweed

[Debian 12 (Bookworm)]

  • [libssl3]Nicht betroffen

    Quellpaket: [openssl]

    Details (6)
    • 3.0.20-1~deb12u2 · amd64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · amd64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · amd64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · arm64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

  • [libssl-dev]Nicht betroffen

    Quellpaket: [openssl]

    Details (6)
    • 3.0.20-1~deb12u2 · amd64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · amd64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · amd64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · arm64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

  • [libssl-doc]Nicht betroffen

    Quellpaket: [openssl]

    Details (6)
    • 3.0.20-1~deb12u2 · all · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · all · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · all · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · all · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · all · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · all · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

  • [openssl]Nicht betroffen
    Details (6)
    • 3.0.20-1~deb12u2 · amd64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · amd64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.20-1~deb12u2 · arm64 · bookworm-security

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · amd64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

    • 3.0.17-1~deb12u2 · arm64 · bookworm-updates

      Nicht betroffen

      usn · openssl · debian · bookworm

[Debian 13 (Trixie)]

  • [libssl3t64]Behoben

    Quellpaket: [openssl]

    Details (6)
    • 3.5.6-1~deb13u2 · amd64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · arm64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · arm64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · amd64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

  • [libssl-dev]Behoben

    Quellpaket: [openssl]

    Details (6)
    • 3.5.6-1~deb13u2 · amd64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · arm64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · arm64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · amd64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

  • [libssl-doc]Behoben

    Quellpaket: [openssl]

    Details (6)
    • 3.5.6-1~deb13u2 · all · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · all · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · all · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · all · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · all · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · all · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

  • [openssl]Behoben
    Details (6)
    • 3.5.6-1~deb13u2 · amd64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · arm64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · arm64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · amd64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

  • Quellpaket: [openssl]

    Details (6)
    • 3.5.6-1~deb13u2 · amd64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · arm64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · arm64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · amd64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

  • Quellpaket: [openssl]

    Details (6)
    • 3.5.6-1~deb13u2 · amd64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · arm64 · trixie

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.6-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · amd64 · trixie-security · Historical version

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u2 · arm64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

    • 3.5.7-1~deb13u3 · amd64 · trixie-security

      Behoben · Behoben: 3.5.5-1~deb13u2

      usn · openssl · debian · 13

Beobachtet:

Referenzen