synced 7 MIN AGO
01 Record

CVE-2025-9820

Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function

MediumPUBLISHEDCNA: redhat
CNA base score4.0 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
View raw JSON

02 Description

Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.22% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 12.7% of scored records. A rank, not a probability.
NVD base score
4.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD analysis status
Deferred. NVD last modified this record on 2026-10-14.
Red Hat severity
Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-01-26 19:58Z9 MO AGO
Last updated
2026-10-14 19:46Z14 DAYS AGO
Reserved
2025-09-02
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Medium (CVSS 4.0)
CNA CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
  • CWE-121Stack-based Buffer OverflowVariant
Data version
5.2
Document digest
4fa740a59ed819b040797a8c3cfbee0625aa88224d17cc0b5766df1cda9242a8

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Enterprise Linux 10Not specified—
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRHEL-8 based Middleware ContainersNot specified—
Red HatCert Manager support for Red Hat OpenShift release 1.18Not specified—
Red HatRed Hat Ceph Storage 8Not specified—
Red HatRed Hat Discovery 2Not specified—
Red HatRed Hat Hardened ImagesNot specified—
Red HatRed Hat Insights proxy 1.5Not specified—
Red HatRed Hat Update Infrastructure 5Not specified—
Red HatRed Hat Enterprise Linux 6Not specified—
Red HatRed Hat Enterprise Linux 7Not specified—
Red HatRed Hat OpenShift Container Platform 4Not specified—

06 References

07 Fixed in

AlmaLinux 8

  • gnutls
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-c++
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-dane
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-devel
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-utils
    Fixed in 3.6.16-8.el8_10.5

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • gnutls
    Fixed in 3.8.3-10.el9_7
  • gnutls-c++
    Fixed in 3.8.3-10.el9_7
  • gnutls-dane
    Fixed in 3.8.3-10.el9_7
  • gnutls-devel
    Fixed in 3.8.3-10.el9_7
  • gnutls-utils
    Fixed in 3.8.3-10.el9_7

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • gnutls
    Fixed in 3.8.10-3.el10_1
  • gnutls-c++
    Fixed in 3.8.10-3.el10_1
  • gnutls-dane
    Fixed in 3.8.10-3.el10_1
  • gnutls-devel
    Fixed in 3.8.10-3.el10_1
  • gnutls-fips
    Fixed in 3.8.10-3.el10_1
  • gnutls-utils
    Fixed in 3.8.10-3.el10_1

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • gnutls
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-c++
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-dane
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-devel
    Fixed in 3.6.16-8.el8_10.5
  • gnutls-utils
    Fixed in 3.6.16-8.el8_10.5

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • gnutls
    Fixed in 3.8.3-10.el9_7
  • gnutls-c++
    Fixed in 3.8.3-10.el9_7
  • gnutls-dane
    Fixed in 3.8.3-10.el9_7
  • gnutls-devel
    Fixed in 3.8.3-10.el9_7
  • gnutls-utils
    Fixed in 3.8.3-10.el9_7

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • gnutls
    Fixed in 3.8.10-3.el10_1
  • gnutls-c++
    Fixed in 3.8.10-3.el10_1
  • gnutls-dane
    Fixed in 3.8.10-3.el10_1
  • gnutls-devel
    Fixed in 3.8.10-3.el10_1
  • gnutls-fips
    Fixed in 3.8.10-3.el10_1
  • gnutls-utils
    Fixed in 3.8.10-3.el10_1

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • gnutls28
    Fixed in 3.7.9-2+deb12u6

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • gnutls28
    Fixed in 3.8.9-3+deb13u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • gnutls28
    Fixed in 3.8.11-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • gnutls28
    Fixed in 3.7.3-4ubuntu1.8

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • gnutls28
    Fixed in 3.8.3-1.1ubuntu3.5

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 25.10

  • gnutls28
    Fixed in 3.8.9-3ubuntu2.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • gnutls28
    Fixed in 3.4.10-4ubuntu1.9+esm3
    Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • gnutls28
    Fixed in 3.5.18-1ubuntu1.6+esm3
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • gnutls28
    Fixed in 3.6.13-2ubuntu1.12+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-preview 22.04 LTS

  • gnutls28
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 22.04 LTS

  • gnutls28
    Fixed in 3.7.3-4ubuntu1.8+Fips1.1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 24.04 LTS

  • gnutls28
    Fixed in 3.8.3-1.1ubuntu3.5+Fips1.1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.