CVE catalog

CVE-2025-14831

GnuTLS vulnerabilities

[CVE catalog]

Severity
Medium · CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published
Source
[NVD] · [CVE record]
EPSS
0.67% · Oct 25, 2026

A flaw was found in GnuTLS. This vulnerability allows a denial of service (DoS) by excessive CPU (Central Processing Unit) and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names (SANs).

Vulnerable and fixed packages

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

DistributionPackageReleaseVersionStatus
Debiangnutls28sid3.8.13-1fixed
Debiangnutls28forky3.8.13-1fixed
Debiangnutls28trixie3.8.9-3+deb13u4fixed
Debiangnutls28trixie-security3.8.9-3+deb13u4fixed
Debiangnutls28bookworm3.7.9-2+deb12u7fixed
Debiangnutls28bookworm-security3.7.9-2+deb12u7fixed
Ubuntugnutls28noble3.8.3-1.1ubuntu3.5fixed
Ubuntugnutls-binnoble3.8.3-1.1ubuntu3.5fixed
Ubuntugnutls-docnoble3.8.3-1.1ubuntu3.5fixed
Ubuntulibgnutls-dane0t64noble3.8.3-1.1ubuntu3.5fixed
Ubuntulibgnutls-openssl27t64noble3.8.3-1.1ubuntu3.5fixed
Ubuntulibgnutls28-devnoble3.8.3-1.1ubuntu3.5fixed
Ubuntulibgnutls30t64noble3.8.3-1.1ubuntu3.5fixed
Alpinegnutls3.203.8.12-r0fixed
Alpinegnutls3.213.8.12-r0fixed
Alpinegnutls3.223.8.12-r0fixed
Alpinegnutls3.233.8.12-r0fixed
Alpinegnutls3.243.8.12-r0fixed
Susegnutlslinux enterprise micro 5.33.7.3-150400.24.2fixed
Ubuntugnutls28pro3.8.3-1.1ubuntu3.1+Fips1vulnerable
Ubuntugnutls28pro3.8.3-1.1ubuntu3.4+Fips1vulnerable
Ubuntugnutls28pro3.8.3-1.1ubuntu3.4+Fips1.1vulnerable
Ubuntugnutls28pro3.8.3-1.1ubuntu3.5+Fips1.1fixed
Ubuntugnutls2822.043.7.1-5ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-2ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-4ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-5ubuntu1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.2vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.3vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.4vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.5vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.6vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.7vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.8fixed
Ubuntugnutls2824.043.8.1-4ubuntu1vulnerable
Ubuntugnutls2824.043.8.1-4ubuntu6vulnerable
Ubuntugnutls2824.043.8.1-4ubuntu7vulnerable
Ubuntugnutls2824.043.8.3-1ubuntu1vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu2vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.1vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.2vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.3vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.4vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.5fixed
Ubuntugnutls2825.103.8.9-2ubuntu3vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu1vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu2vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu2.1fixed
Ubuntugnutls2822.043.7.1-5ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-2ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-4ubuntu1vulnerable
Ubuntugnutls2822.043.7.2-5ubuntu1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.1vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.2vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.3vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.4vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.5vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.6vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.7vulnerable
Ubuntugnutls2822.043.7.3-4ubuntu1.8fixed
Ubuntugnutls2824.043.8.1-4ubuntu1vulnerable
Ubuntugnutls2824.043.8.1-4ubuntu6vulnerable
Ubuntugnutls2824.043.8.1-4ubuntu7vulnerable
Ubuntugnutls2824.043.8.3-1ubuntu1vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu2vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.1vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.2vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.3vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.4vulnerable
Ubuntugnutls2824.043.8.3-1.1ubuntu3.5fixed
Ubuntugnutls2825.103.8.9-2ubuntu3vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu1vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu2vulnerable
Ubuntugnutls2825.103.8.9-3ubuntu2.1fixed
Susegnutlslinux enterprise server 16.03.8.10-160000.2.1fixed
Susegnutlslinux enterprise server for sap applications 16.03.8.10-160000.2.1fixed
Susegnutlslinux micro 6.23.8.10-160000.2.1fixed
Susegnutlslinux micro 6.23.8.10-160000.2.1fixed
Opensusegnutlsleap 16.03.8.10-160000.2.1fixed
Opensusegnutlstumbleweed3.8.12-1.1fixed
Susegnutlslinux micro 6.03.8.3-6.1fixed
Susegnutlslinux micro 6.13.8.3-slfo.1.1_6.1fixed
Susegnutlslinux enterprise micro 5.43.7.3-150400.4.56.1fixed
Susegnutlslinux enterprise micro 5.53.7.3-150400.4.56.1fixed
Susegnutlslinux enterprise module for basesystem 15 sp73.8.3-150600.4.17.1fixed
Opensusegnutlsleap 15.63.8.3-150600.4.17.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debiangnutls28sourcesid3.8.12-1not yet assignedNot reportedNot reported
Debiangnutls28sourceforky3.8.12-1not yet assignedNot reportedNot reported
Debiangnutls28sourcetrixie3.8.9-3+deb13u2not yet assignedNot reportedNot reported
Debiangnutls28sourcebookworm3.7.9-2+deb12u6not yet assignedNot reportedNot reported
Ubuntugnutls28debnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntugnutls-bindebnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntugnutls-docdebnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntulibgnutls-dane0t64debnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntulibgnutls-openssl27t64debnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntulibgnutls28-devdebnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Ubuntulibgnutls30t64debnoble3.8.3-1.1ubuntu3.5Not reportedNot reportedNot reported
Alpinegnutlsapk3.203.8.12-r0Not reportedALPINE-CVE-2025-14831Not reported
Alpinegnutlsapk3.213.8.12-r0Not reportedALPINE-CVE-2025-14831Not reported
Alpinegnutlsapk3.223.8.12-r0Not reportedALPINE-CVE-2025-14831Not reported
Alpinegnutlsapk3.233.8.12-r0Not reportedALPINE-CVE-2025-14831Not reported
Alpinegnutlsapk3.243.8.12-r0Not reportedALPINE-CVE-2025-14831Not reported
Susegnutlsrpmlinux enterprise micro 5.33.7.3-150400.24.2Not reportedSUSE-SU-2026:2822-1Not reported
Ubuntugnutls28debpro3.8.3-1.1ubuntu3.5+Fips1.1Not reportedUBUNTU-CVE-2025-14831Not reported
Ubuntugnutls28deb22.043.7.3-4ubuntu1.8Not reportedUBUNTU-CVE-2025-14831Not reported
Ubuntugnutls28deb24.043.8.3-1.1ubuntu3.5Not reportedUBUNTU-CVE-2025-14831Not reported
Ubuntugnutls28deb25.103.8.9-3ubuntu2.1Not reportedUBUNTU-CVE-2025-14831Not reported
Ubuntugnutls28deb22.043.7.3-4ubuntu1.8Not reportedUSN-8043-1Not reported
Ubuntugnutls28deb24.043.8.3-1.1ubuntu3.5Not reportedUSN-8043-1Not reported
Ubuntugnutls28deb25.103.8.9-3ubuntu2.1Not reportedUSN-8043-1Not reported
Susegnutlsrpmlinux enterprise server 16.03.8.10-160000.2.1Not reportedSUSE-SU-2026:20984-1Not reported
Susegnutlsrpmlinux enterprise server for sap applications 16.03.8.10-160000.2.1Not reportedSUSE-SU-2026:20984-1Not reported
Susegnutlsrpmlinux micro 6.23.8.10-160000.2.1Not reportedSUSE-SU-2026:20968-1Not reported
Susegnutlsrpmlinux micro 6.23.8.10-160000.2.1Not reportedSUSE-SU-2026:20962-1Not reported
Opensusegnutlsrpmleap 16.03.8.10-160000.2.1Not reportedOPENSUSE-SU-2026:20446-1Not reported
Opensusegnutlsrpmtumbleweed3.8.12-1.1Not reportedOPENSUSE-SU-2026:10177-1Not reported
Susegnutlsrpmlinux micro 6.03.8.3-6.1Not reportedSUSE-SU-2026:20708-1Not reported
Susegnutlsrpmlinux micro 6.13.8.3-slfo.1.1_6.1Not reportedSUSE-SU-2026:20654-1Not reported
Susegnutlsrpmlinux enterprise micro 5.43.7.3-150400.4.56.1Not reportedSUSE-SU-2026:0862-1Not reported
Susegnutlsrpmlinux enterprise micro 5.53.7.3-150400.4.56.1Not reportedSUSE-SU-2026:0862-1Not reported
Susegnutlsrpmlinux enterprise module for basesystem 15 sp73.8.3-150600.4.17.1Not reportedSUSE-SU-2026:0829-1Not reported
Opensusegnutlsrpmleap 15.63.8.3-150600.4.17.1Not reportedSUSE-SU-2026:0829-1Not reported

OpenFactory catalog packages

[openSUSE Tumbleweed]

  • [libgnutls30]Unknown

    Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · noarch · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • [libgnutlsxx30]Unknown

    Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

  • Source package: [gnutls]

    Details (1)
    • 3.8.13-3.1 · x86_64 · tumbleweed

      Unknown · Fixed: 3.8.12-1.1

      Version impact unknown

      usn · gnutls · opensuse · tumbleweed

[Debian 12 (Bookworm)]

  • [gnutls-bin]Fixed

    Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • [gnutls-doc]Fixed

    Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · all · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · all · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · all · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · all · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

  • Source package: [gnutls28]

    Details (4)
    • 3.7.9-2+deb12u7 · amd64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · amd64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

    • 3.7.9-2+deb12u7 · arm64 · bookworm-security

      Fixed · Fixed: 3.7.9-2+deb12u6

      usn · gnutls28 · debian · bookworm; usn · gnutls28 · debian · 12

[Debian 13 (Trixie)]

  • [gnutls-bin]Fixed

    Source package: [gnutls28]

    Details (4)
    • 3.8.9-3+deb13u4 · amd64 · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · arm64 · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · amd64 · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · arm64 · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

  • [gnutls-doc]Fixed

    Source package: [gnutls28]

    Details (4)
    • 3.8.9-3+deb13u4 · all · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · all · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · all · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · all · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

  • Source package: [gnutls28]

    Details (4)
    • 3.8.9-3+deb13u4 · amd64 · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · arm64 · trixie

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · amd64 · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

    • 3.8.9-3+deb13u4 · arm64 · trixie-security

      Fixed · Fixed: 3.8.9-3+deb13u2

      usn · gnutls28 · debian · 13

Next results

Observed:

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]