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TI-2026-45026 Aliases CVE-2026-63072GHSA-wp5f-6q39-q2f4

Heap Buffer Overflow in CMS Key Unwrapping

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 28 fixed, 9 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based on querying the unwrapped key size, but the AES-WRAP-PAD unwrap primitive can write and cleanse more bytes than that query reports, causing an 8-byte out-of-bounds heap write. Impact summary: An attacker who supplies a crafted CMS message can trigger a deterministic 8-byte out-of-bounds heap write when the victim decrypts it with CMS_decrypt(), corrupting the heap and typically resulting in a Denial of Service. CWE: CWE-787: Out-of-bounds Write Description: The key-wrap OID is potentially attacker-controlled on the wire. CMS unwrapping allows both id-aesNNN-wrap-pad and id-aesNNN-wrap ciphers. An attacker can take a legitimate message and change a single OID byte to select the padded variant while leaving the message otherwise valid. Since the unwrap key is derived from the recipient's private operation (ECDH key agreement or ML-KEM decapsulation), the RFC 5649 integrity check cannot pass, and the decryption fails with integrity failure. The write is a fixed-size (8-byte), fixed-value (zero) heap overflow immediately past the allocation, requires no special configuration, and is reachable from the public CMS_decrypt() function. The consequence is a heap corruption leading to a Denial of Service. The fix in the CMS code sizes the unwrap output buffer for the worst case so a failed unwrap cannot write past the allocation. FIPS impact: no As the CMS code lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00916 60th percentileScored 2026-11-07
Fix Partial OpenSSL (OpenSSL): 4.0.2, 3.6.4, 3.5.8 +3Red Hat: 26 advisoriesRed Hat: 28 fixed, 9 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenSSLOpenSSL4.0.0 to before 4.0.2; 3.6.0 to before 3.6.4; 3.5.0 to before 3.5.8; 3.4.0 to before 3.4.7; 3.0.0 to before 3.0.22; 1.1.1 to before 1.1.1zi4.0.2, 3.6.4, 3.5.8, 3.4.7, 3.0.22, 1.1.1ziPatch availableCNA
  • OpenSSL VendorOpenSSL Affected 4.0.0 to before 4.0.2; 3.6.0 to before 3.6.4; 3.5.0 to before 3.5.8; 3.4.0 to before 3.4.7; 3.0.0 to before 3.0.22; 1.1.1 to before 1.1.1zi Fixed in 4.0.2, 3.6.4, 3.5.8, 3.4.7, 3.0.22, 1.1.1zi Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*3.0.0 to before 3.0.22; 3.4.0 to before 3.4.7; 3.5.0 to before 3.5.8; 3.6.0 to before 3.6.4; 4.0.0 to before 4.0.2VulnerableOpenSSL
  • cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.0.22; 3.4.0 to before 3.4.7; 3.5.0 to before 3.5.8; 3.6.0 to before 3.6.4; 4.0.0 to before 4.0.2 Vulnerable ·OpenSSL

Remediation

  • Fix · CNA OpenSSL (OpenSSL) Fixed in 4.0.2, 3.6.4, 3.5.8, 3.4.7, 3.0.22, 1.1.1zi

Red Hat 26 advisories

  • RHSA-2026:95346 Released 2026-11-06 · Red Hat rating Critical
    OpenShift Container Platform 4.22.22 bug fix and security update
    • Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202611032353-0, rhcos-ppc64le-4.22.9.8.202611032353-0, rhcos-s390x-4.22.9.8.202611032353-0 +1
  • RHSA-2026:92859 Released 2026-10-29 · Red Hat rating Important
    Satellite 6.17 security update
    • Red Hat Satellite 6.17 for RHEL 9 openvox-agent-8.31.1-1.el9sat, openvox-server-8.17.0-1.el9sat, yggdrasil-worker-forwarder-0.1.1-1.el9sat
  • RHSA-2026:92858 Released 2026-10-29 · Red Hat rating Important
    Satellite 6.16 EUS security update
    • Red Hat Satellite 6.16 for RHEL 8 openvox-agent-8.31.1-1.el8sat, openvox-server-8.17.0-1.el8sat, yggdrasil-worker-forwarder-0.1.1-1.el8sat
    • Red Hat Satellite 6.16 for RHEL 9 openvox-agent-8.31.1-1.el9sat, openvox-server-8.17.0-1.el9sat, yggdrasil-worker-forwarder-0.1.1-1.el9sat
Show 23 more Red Hat advisories
  • RHSA-2026:92860 Released 2026-10-29 · Red Hat rating Important
    Satellite 6.18 security update
    • Red Hat Satellite 6.18 for RHEL 9 openvox-agent-8.31.1-1.el9sat, openvox-server-8.17.0-1.el9sat, yggdrasil-worker-forwarder-0.1.1-1.el9sat
  • RHSA-2026:89738 Released 2026-10-26 · Red Hat rating Important
    compat-openssl11 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) compat-openssl11-1:1.1.1k-5.el9_6.4
  • RHSA-2026:89736 Released 2026-10-26 · Red Hat rating Important
    compat-openssl11 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) compat-openssl11-1:1.1.1k-5.el9_4.4
  • RHSA-2026:89737 Released 2026-10-26 · Red Hat rating Important
    compat-openssl11 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) compat-openssl11-1:1.1.1k-4.el9_2.3
  • RHSA-2026:85968 Released 2026-10-20 · Red Hat rating Important
    openssl security update
    • Red Hat Enterprise Linux BaseOS (v. 8) openssl-1:1.1.1k-18.el8_6, openssl-devel-1:1.1.1k-18.el8_6, openssl-libs-1:1.1.1k-18.el8_6 +1
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) openssl-1:1.1.1k-18.el8_6, openssl-devel-1:1.1.1k-18.el8_6, openssl-libs-1:1.1.1k-18.el8_6 +1
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) openssl-1:1.1.1k-18.el8_6, openssl-devel-1:1.1.1k-18.el8_6, openssl-libs-1:1.1.1k-18.el8_6 +1
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) openssl-1:1.1.1k-18.el8_6, openssl-devel-1:1.1.1k-18.el8_6, openssl-libs-1:1.1.1k-18.el8_6 +1
  • RHSA-2026:85970 Released 2026-10-20 · Red Hat rating Important
    openssl security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) openssl-1:1.1.1g-18.el8_4.4, openssl-devel-1:1.1.1g-18.el8_4.4, openssl-libs-1:1.1.1g-18.el8_4.4 +1
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) openssl-1:1.1.1g-18.el8_4.4, openssl-devel-1:1.1.1g-18.el8_4.4, openssl-libs-1:1.1.1g-18.el8_4.4 +1
  • RHSA-2026:85249 Released 2026-10-19 · Red Hat rating Moderate
    Satellite 6 Client Update
    • Satellite Client 6 for RHEL 10 openvox-agent-8.30.0-1.el10sat
    • Satellite Client 6 for RHEL 7 openvox-agent-8.30.0-1.el7sat
    • Satellite Client 6 for RHEL 8 openvox-agent-8.30.0-1.el8sat
    • Satellite Client 6 for RHEL 9 openvox-agent-8.30.0-1.el9sat
  • RHSA-2026:81201 Released 2026-10-12 · Red Hat rating Important
    Cost Management Metrics Operator Update
    • Cost Management 4 registry.redhat.io/costmanagement/costmanagement-metrics-rhel9-operator
  • RHSA-2026:80514 Released 2026-10-12 · Red Hat rating Moderate
    compat-openssl11 security update
    • Red Hat Enterprise Linux AppStream (v. 9) compat-openssl11-1:1.1.1k-5.el9_8.6
  • RHSA-2026:79357 Released 2026-10-08 · Red Hat rating Important
    Red Hat Cost Management On-Premise container image update
    • Red Hat Cost Management On-Premise 1 registry.redhat.io/costmanagement/costmanagement-ui-rhel10
  • RHSA-2026:79088 Released 2026-10-08 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:72476 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:72475 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:72470 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/jetstack-cert-manager-acmesolver-rhel9, registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:72399 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-operator-rhel9
  • RHSA-2026:72395 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/cert-manager-istio-csr-rhel9
  • RHSA-2026:72394 Released 2026-09-28 · Red Hat rating Important
    cert-manager Operator for Red Hat OpenShift 1.20.1
    • Cert Manager support for Red Hat OpenShift release 1.20 registry.redhat.io/cert-manager/jetstack-cert-manager-rhel9
  • RHSA-2026:71603 Released 2026-09-24 · Red Hat rating Important
    Red Hat Update Infrastructure 5.3 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-rhel9, registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9 +2
  • RHSA-2026:67956 Released 2026-09-16 · Red Hat rating Important
    Red Hat Update Infrastructure 5.3 security update
    • Red Hat Update Infrastructure 5 registry.redhat.io/rhui5/cds-kubernetes-rhel9, registry.redhat.io/rhui5/cds-rhel9, registry.redhat.io/rhui5/haproxy-rhel9 +2
  • RHSA-2026:67165 Released 2026-09-14 · Red Hat rating Important
    openssl security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) openssl-devel-1:3.5.8-1.el9_8, openssl-perl-1:3.5.8-1.el9_8
    • Red Hat Enterprise Linux BaseOS (v. 9) openssl-1:3.5.8-1.el9_8, openssl-libs-1:3.5.8-1.el9_8
  • RHSA-2026:67154 Released 2026-09-14 · Red Hat rating Important
    openssl security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) openssl-devel-1:3.5.8-1.el10_2, openssl-perl-1:3.5.8-1.el10_2
    • Red Hat Enterprise Linux BaseOS (v. 10) openssl-1:3.5.8-1.el10_2, openssl-libs-1:3.5.8-1.el10_2
  • RHSA-2026:59641 Released 2026-08-25 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images openssl-1:3.5.8-0.1.hum1@aarch64, openssl-1:3.5.8-0.1.hum1@src, openssl-1:3.5.8-0.1.hum1@x86_64 +12
  • RHSA-2026:59635 Released 2026-08-25 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images openssl3-1:3.5.8-0.1.hum1@src, openssl3-devel-1:3.5.8-0.1.hum1@aarch64, openssl3-devel-1:3.5.8-0.1.hum1@x86_64 +4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    OpenSSL — openssl-library.org/news/secadv/20260825.txt

    9 records Highest priority Priority MEDIUM 8 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-45027 Untrusted Sender DN Used as Format String in CMP Response ValidationPriority MEDIUM 51
    • TI-2026-53058 AEAD Forgeries with Empty Ciphertext When Using EVP_Cipher()Priority MEDIUM 47
    • TI-2026-45030 Invalid Pointer Dereference in CMP Server via Crafted protectionAlgPriority MEDIUM 42
    Show all 9 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat JBoss Core ServicesAffectedNo fix planned: Will not fix
Red Hat JBoss Web Server 6AffectedNo fix planned: Will not fix
Red Hat JBoss Web Server 7AffectedNo fix planned: Will not fix
Red Hat OpenShift Container Platform 4AffectedNo fix yet
Red Hat OpenShift Container Platform 5AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix yet
Red Hat Satellite ClientAffectedNo fix yet
Cert Manager support for Red Hat OpenShift release 1.20Fixed RHSA-2026:72394, RHSA-2026:72395, RHSA-2026:72399, RHSA-2026:72470, RHSA-2026:72475, RHSA-2026:72476
Cost Management 4Fixed RHSA-2026:81201
Red Hat Cost Management On-Premise 1Fixed RHSA-2026:79357
Red Hat Developer Hub 1.10Fixed RHSA-2026:79088
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:67154
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:67165, RHSA-2026:80514
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:89737
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:89736
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:89738
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:67154
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:85968
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:67165
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:85970
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:85968
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:85970
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:85968
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:85968
Red Hat Hardened ImagesFixed RHSA-2026:59635, RHSA-2026:59641
Red Hat OpenShift Container Platform 4.22Fixed RHSA-2026:95346
Red Hat Satellite 6.16 for RHEL 8Fixed RHSA-2026:92858
Red Hat Satellite 6.16 for RHEL 9Fixed RHSA-2026:92858
Red Hat Satellite 6.17 for RHEL 9Fixed RHSA-2026:92859
Red Hat Satellite 6.18 for RHEL 9Fixed RHSA-2026:92860
Red Hat Update Infrastructure 5Fixed RHSA-2026:67956, RHSA-2026:71603
Satellite Client 6 for RHEL 10Fixed RHSA-2026:85249
Satellite Client 6 for RHEL 7Fixed RHSA-2026:85249
Satellite Client 6 for RHEL 8Fixed RHSA-2026:85249
Satellite Client 6 for RHEL 9Fixed RHSA-2026:85249
Not affected: 20 products
  • Cert Manager support for Red Hat OpenShift release 1.20
  • Cost Management 4
  • Red Hat Developer Hub 1.10
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AppStream E4S (v.9.2)
  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • Red Hat Hardened Images
  • Red Hat OpenShift AI (RHOAI)
  • Red Hat Satellite 6.16 for RHEL 8
  • Red Hat Satellite 6.16 for RHEL 9
  • Red Hat Satellite 6.17 for RHEL 9
  • Red Hat Satellite 6.18 for RHEL 9
  • Red Hat Update Infrastructure 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-63072
  2. 2026-10-03 Alias added: GHSA-wp5f-6q39-q2f4
  3. 2026-10-09 Fix available: RHSA-2026:79088 · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:79357 · Red Hat
  5. 2026-10-09 Fix available: Red Hat Cost Management On-Premise 1, Red Hat Developer Hub 1.10 · Red Hat
  6. 2026-10-12 Fix available: RHSA-2026:80514 · Red Hat
  7. 2026-10-12 Affected versions changed · Red Hat
  8. 2026-10-13 Fix available: RHSA-2026:81201 · Red Hat
  9. 2026-10-13 Fix available: Cost Management 4 · Red Hat
  10. 2026-10-20 Fix available: RHSA-2026:85249 · Red Hat
  11. 2026-10-20 Fix available: Satellite Client 6 for RHEL 10, Satellite Client 6 for RHEL 7, Satellite Client 6 for RHEL 8 +1 · Red Hat
  12. 2026-10-20 Fix available: RHSA-2026:85970 · Red Hat
  13. 2026-10-20 Fix available: RHSA-2026:85968 · Red Hat
  14. 2026-10-21 Fix available: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS E4S (v.8.8) +3 · Red Hat
  15. 2026-10-26 Fix available: RHSA-2026:89738 · Red Hat
  16. 2026-10-26 Fix available: RHSA-2026:89736 · Red Hat
  17. 2026-10-26 Fix available: RHSA-2026:89737 · Red Hat
  18. 2026-10-26 Fix available: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6) · Red Hat
  19. 2026-10-30 Fix available: RHSA-2026:92858 · Red Hat
  20. 2026-10-30 Fix available: RHSA-2026:92859 · Red Hat
  21. 2026-10-30 Fix available: Red Hat Satellite 6.16 for RHEL 8, Red Hat Satellite 6.16 for RHEL 9, Red Hat Satellite 6.17 for RHEL 9 · Red Hat
  22. 2026-10-30 Fix available: RHSA-2026:92860 · Red Hat
  23. 2026-10-30 Fix available: Red Hat Satellite 6.18 for RHEL 9 · Red Hat
  24. 2026-11-06 Affected versions changed · Red Hat
  25. 2026-11-07 Fix available: RHSA-2026:95346 · Red Hat
  26. 2026-11-07 Fix available: Red Hat OpenShift Container Platform 4.22 · Red Hat

References

Patch 5

Advisory 1

  • TI-2022-01915 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
  • TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsing CVSS 3.1HIGH 8.8
See all 312 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences