Read the docs
TI-2026-22664 Aliases CVE-2026-28389GHSA-7x88-9hgc-69gf

Possible NULL Dereference When Processing CMS KeyAgreeRecipientInfo

Priority MEDIUM 40CWE-476Published · 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: 1 fixed, 8 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyAgreeRecipientInfo is processed, the optional parameters field of KeyEncryptionAlgorithmIdentifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00836 57th percentileScored 2026-11-07
Fix Partial OpenSSL (OpenSSL): 3.6.2, 3.5.6, 3.4.5 +4Red Hat: 1 advisoryRed Hat: 1 fixed, 8 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
OpenSSLOpenSSL3.6.0 to before 3.6.2; 3.5.0 to before 3.5.6; 3.4.0 to before 3.4.5; 3.3.0 to before 3.3.7; 3.0.0 to before 3.0.20; 1.1.1 to before 1.1.1zg; 1.0.2 to before 1.0.2zp3.6.2, 3.5.6, 3.4.5, 3.3.7, 3.0.20, 1.1.1zg, 1.0.2zpPatch availableCNA
  • OpenSSL VendorOpenSSL Affected 3.6.0 to before 3.6.2; 3.5.0 to before 3.5.6; 3.4.0 to before 3.4.5; 3.3.0 to before 3.3.7; 3.0.0 to before 3.0.20; 1.1.1 to before 1.1.1zg; 1.0.2 to before 1.0.2zp Fixed in 3.6.2, 3.5.6, 3.4.5, 3.3.7, 3.0.20, 1.1.1zg, 1.0.2zp Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*1.0.2 to before 1.0.2zp; 1.1.1 to before 1.1.1zg; 3.0.0 to before 3.0.20; 3.3.0 to before 3.3.7; 3.4.0 to before 3.4.5; 3.5.0 to before 3.5.6; 3.6.0 to before 3.6.2VulnerableOpenSSL
  • cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions 1.0.2 to before 1.0.2zp; 1.1.1 to before 1.1.1zg; 3.0.0 to before 3.0.20; 3.3.0 to before 3.3.7; 3.4.0 to before 3.4.5; 3.5.0 to before 3.5.6; 3.6.0 to before 3.6.2 Vulnerable ·OpenSSL

Remediation

  • Fix · CNA OpenSSL (OpenSSL) Fixed in 3.6.2, 3.5.6, 3.4.5, 3.3.7, 3.0.20, 1.1.1zg, 1.0.2zp

Red Hat 1 advisory

  • RHSA-2026:7261 Released 2026-04-09 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images openssl-3.5.6-0.1.hum1@aarch64, openssl-3.5.6-0.1.hum1@src, openssl-3.5.6-0.1.hum1@x86_64 +10

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/20260407.txt

    7 records Highest priority Priority MEDIUM 6 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-22661 Out-of-bounds Read in AES-CFB-128 on X86-64 with AVX-512 SupportPriority MEDIUM 46
    • TI-2026-24345 Heap Buffer Overflow in Hexadecimal ConversionPriority MEDIUM 42
    • TI-2026-24346 Incorrect Failure Handling in RSA KEM RSASVE EncapsulationPriority MEDIUM 41
    Show all 7 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 6AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat JBoss Core ServicesAffectedNo fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)Affected—
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:7261
Not affected: 1 product
  • Red Hat OpenShift AI (RHOAI)

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28389
  2. 2026-10-03 Alias added: GHSA-7x88-9hgc-69gf
  3. 2026-11-06 Affected versions changed · 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