synced 12 MIN AGO
01 Record

CVE-2026-34180

Heap Buffer Over-read in ASN.1 Content Parsing

HighPUBLISHEDCNA: openssl
CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
View raw JSON

02 Description

Heap Buffer Over-read in ASN.1 Content Parsing

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
1.02% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 63.0% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-07-23.
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
2026-06-09 16:03Z4 MO AGO
Last updated
2026-06-10 07:47Z4 MO AGO
Reserved
2026-03-26
Assigning CNA
openssl
Record state
PUBLISHED
Severity
High (CVSS 7.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-125Out-of-bounds ReadBase
  • CWE-190Integer Overflow or WraparoundBase
Data version
5.2
Document digest
677881285e49aefb30600c04effc2fc1a3f7b9d70f1ded3241b2ab41bb3d63ca

05 Affected products

VendorProductVersionsPlatforms
OpenSSLOpenSSL4.0.0 to < 4.0.1, 3.6.0 to < 3.6.3, 3.5.0 to < 3.5.7, 3.4.0 to < 3.4.6, 3.0.0 to < 3.0.21, 1.1.1 to < 1.1.1zh, 1.0.2 to < 1.0.2zq—

06 References

07 Fixed in

AlmaLinux 9

  • openssl
    Fixed in 1:3.5.5-4.el9_8
  • openssl-devel
    Fixed in 1:3.5.5-4.el9_8
  • openssl-libs
    Fixed in 1:3.5.5-4.el9_8
  • openssl-perl
    Fixed in 1:3.5.5-4.el9_8

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

AlmaLinux 10

  • openssl
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-devel
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-libs
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-perl
    Fixed in 1:3.5.5-4.el10_2.alma.1

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

CloudLinux 9

  • openssl
    Fixed in 1:3.5.5-4.el9_8
  • openssl-devel
    Fixed in 1:3.5.5-4.el9_8
  • openssl-libs
    Fixed in 1:3.5.5-4.el9_8
  • openssl-perl
    Fixed in 1:3.5.5-4.el9_8

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

  • openssl
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-devel
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-libs
    Fixed in 1:3.5.5-4.el10_2.alma.1
  • openssl-perl
    Fixed in 1:3.5.5-4.el10_2.alma.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

  • openssl
    Fixed in 3.0.20-1~deb12u2

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

Debian 13

  • openssl
    Fixed in 3.5.6-1~deb13u2

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

Debian 14

  • openssl
    Fixed in 3.6.3-1

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

Ubuntu 22.04 LTS

  • edk2
    No fix yet
  • openssl
    Fixed in 3.0.2-0ubuntu1.25

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

Ubuntu 24.04 LTS

  • edk2
    No fix yet
  • openssl
    Fixed in 3.0.13-0ubuntu3.11

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

Ubuntu 25.10

  • edk2
    No fix yet
  • openssl
    Fixed in 3.5.3-1ubuntu3.4

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

Ubuntu 26.04 LTS

  • edk2
    No fix yet
  • edk2-hwe
    No fix yet
  • openssl
    Fixed in 3.5.5-1ubuntu3.2

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

Ubuntu 26.10

  • edk2
    No fix yet
  • edk2-hwe
    No fix yet

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

Ubuntu Pro 14.04 LTS

  • openssl
    Fixed in 1.0.1f-1ubuntu2.27+esm14
    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 16.04 LTS

  • edk2
    No fix yet
  • nodejs
    No fix yet
  • openssl
    Fixed in 1.0.2g-1ubuntu4.20+esm16
    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

  • edk2
    No fix yet
  • nodejs
    No fix yet
  • openssl
    Fixed in 1.1.1-1ubuntu2.1~18.04.23+esm9
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
  • openssl1.0
    Fixed in 1.0.2n-1ubuntu5.13+esm5
    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

  • edk2
    No fix yet
  • openssl
    Fixed in 1.1.1f-1ubuntu2.24+esm4
    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 22.04 LTS

  • nodejs
    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-preview 22.04 LTS

  • openssl
    No fix yet
  • openssl-fips
    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 16.04 LTS

  • openssl
    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 18.04 LTS

  • openssl
    Fixed in 1.1.1-1ubuntu2.fips.2.1~18.04.23.9
    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 20.04 LTS

  • openssl
    Fixed in 1.1.1f-1ubuntu2.fips.24.4
    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 22.04 LTS

  • openssl
    Fixed in 3.0.2-0ubuntu1.25+Fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro
  • openssl-fips
    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 24.04 LTS

  • openssl-fips
    Fixed in 3.0.13-0ubuntu3.12+Fips1
    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 16.04 LTS

  • openssl
    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 18.04 LTS

  • openssl
    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 20.04 LTS

  • openssl
    No fix yet

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.