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TI-2026-33226 Aliases CVE-2026-45447GHSA-f684-cpcq-j565

Heap Use-After-Free in the PKCS7_verify() Function

Priority MEDIUM 47CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 42 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When processing a PKCS#7 or S/MIME signed message, if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent use of the BIO by the calling application results in a use-after-free condition. In the common case this occurs when the application later calls BIO_free() on the BIO originally passed to PKCS7_verify(). Depending on allocator behavior and application-specific BIO usage patterns, this may result in a crash or other memory corruption. In some application contexts this may potentially be exploitable for remote code execution. Applications that process PKCS#7 or S/MIME signed messages using OpenSSL PKCS#7 APIs may be affected. Applications using the CMS APIs for this processing are not affected. The FIPS modules in 4.0, 3.6, 3.5, 3.4, 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 0.04002 90th percentileScored 2026-11-07
Fix Partial OpenSSL (OpenSSL): 4.0.1, 3.6.3, 3.5.7 +4Red Hat: 71 advisoriesRed Hat: 42 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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 4.0.1; 3.6.0 to before 3.6.3; 3.5.0 to before 3.5.7; 3.4.0 to before 3.4.6; 3.0.0 to before 3.0.21; 1.1.1 to before 1.1.1zh; 1.0.2 to before 1.0.2zq4.0.1, 3.6.3, 3.5.7, 3.4.6, 3.0.21, 1.1.1zh, 1.0.2zqPatch availableCNA
  • OpenSSL VendorOpenSSL Affected 4.0.0 to before 4.0.1; 3.6.0 to before 3.6.3; 3.5.0 to before 3.5.7; 3.4.0 to before 3.4.6; 3.0.0 to before 3.0.21; 1.1.1 to before 1.1.1zh; 1.0.2 to before 1.0.2zq Fixed in 4.0.1, 3.6.3, 3.5.7, 3.4.6, 3.0.21, 1.1.1zh, 1.0.2zq Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*1.0.2 to before 1.0.2zq; 1.1.1 to before 1.1.1zh; 3.0.0 to before 3.0.21; 3.4.0 to before 3.4.6; 3.5.0 to before 3.5.7; 3.6.0 to before 3.6.3VulnerableOpenSSL
cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*4.0.0VulnerableOpenSSL
  • cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions 1.0.2 to before 1.0.2zq; 1.1.1 to before 1.1.1zh; 3.0.0 to before 3.0.21; 3.4.0 to before 3.4.6; 3.5.0 to before 3.5.7; 3.6.0 to before 3.6.3 Vulnerable ·OpenSSL
  • cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·OpenSSL

Remediation

  • Fix · CNA OpenSSL (OpenSSL) Fixed in 4.0.1, 3.6.3, 3.5.7, 3.4.6, 3.0.21, 1.1.1zh, 1.0.2zq

Red Hat 71 advisories

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    Red Hat AI Base Images 3.0.8 (CUDA)
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    Red Hat AI Base Images 3.5.6 (CUDA 12.9)
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  • RHSA-2026:94468 Released 2026-11-03 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.7 (CUDA 13.0)
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    Red Hat AI Base Images 3.5.5 (Neuron)
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    Red Hat AI Base Images 3.4.6 (Neuron)
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    Red Hat AI Base Images 3.5.5 (ROCm 7.14)
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    Red Hat AI Base Images 3.4.6 (Spyre)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-spyre-rhel9
  • RHSA-2026:91244 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (ROCm 6.4)
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    Red Hat AI Base Images 3.0.7 (TPU)
    • Red Hat OpenShift AI 3.0 registry.redhat.io/rhai/base-image-tpu-rhel9
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    Red Hat AI Base Images 3.4.6 (CPU)
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    Red Hat AI Base Images 3.5.5 (CUDA 13.0)
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-cuda-13.0-rhel9
  • RHSA-2026:91237 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.5.5 (CUDA 12.9)
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-cuda-12.9-rhel9
  • RHSA-2026:91236 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.0.7 (CUDA)
    • Red Hat OpenShift AI 3.0 registry.redhat.io/rhai/base-image-cuda-rhel9
  • RHSA-2026:91235 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (CUDA 13.0)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-cuda-13.0-rhel9
  • RHSA-2026:91234 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (Gaudi)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-gaudi-rhel9
  • RHSA-2026:91233 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (TPU)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-tpu-rhel9
  • RHSA-2026:91232 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.0.7 (CPU)
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    Red Hat AI Base Images 3.5.5 (Rubin)
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    Red Hat AI Base Images 3.0.7 (ROCm)
    • Red Hat OpenShift AI 3.0 registry.redhat.io/rhai/base-image-rocm-rhel9
  • RHSA-2026:91218 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.4.6 (CUDA 12.9)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-cuda-12.9-rhel9
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    Red Hat AI Base Images 3.4.6 (ROCm 7.1)
    • Red Hat OpenShift AI 3.4 registry.redhat.io/rhai/base-image-rocm-7.1-rhel9
  • RHSA-2026:91207 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.5.5 (Gaudi)
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-gaudi-rhel9
  • RHSA-2026:91206 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.0.7 (Spyre)
    • Red Hat OpenShift AI 3.0 registry.redhat.io/rhai/base-image-spyre-rhel9
  • RHSA-2026:91204 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.5.5 (CPU)
    • Red Hat OpenShift AI 3.5 registry.redhat.io/rhai/base-image-cpu-rhel9
  • RHSA-2026:91202 Released 2026-10-27 · Red Hat rating Critical
    Red Hat AI Base Images 3.5.5 (TPU)
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    OpenShift Container Platform 4.19.53 bug fix and security update
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    OpenShift Container Platform 4.21.40 bug fix and security update
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    OpenShift Container Platform 4.20.44 bug fix and security update
    • Red Hat OpenShift Container Platform 4.20 rhcos-aarch64-4.20.9.6.202610242033-0, rhcos-ppc64le-4.20.9.6.202610242033-0, rhcos-s390x-4.20.9.6.202610242033-0 +1
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    • Red Hat Enterprise Linux AppStream EUS (v.9.6) openssl-devel-1:3.2.2-7.el9_6.4, openssl-perl-1:3.2.2-7.el9_6.4
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) openssl-1:3.2.2-7.el9_6.4, openssl-libs-1:3.2.2-7.el9_6.4
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    cert-manager Operator for Red Hat OpenShift 1.17.2
    • Cert Manager support for Red Hat OpenShift release 1.17 registry.redhat.io/cert-manager/cert-manager-operator-bundle
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    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) openssl-1:1.1.1k-16.el8_6, openssl-devel-1:1.1.1k-16.el8_6, openssl-libs-1:1.1.1k-16.el8_6 +1
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    openssl security update
    • Red Hat Enterprise Linux AppStream (v. 10) openssl-devel-1:3.5.5-4.el10_2, openssl-perl-1:3.5.5-4.el10_2
    • Red Hat Enterprise Linux BaseOS (v. 10) openssl-1:3.5.5-4.el10_2, openssl-libs-1:3.5.5-4.el10_2

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/20260609.txt

    18 records Highest priority Priority MEDIUM 6 MEDIUM, 12 LOW

    Other records, highest priority first

    • TI-2026-26479 CMS AuthEnvelopedData Processing May Accept Forged MessagesPriority MEDIUM 47
    • TI-2026-30987 NULL Pointer Dereference in QUIC Server Initial Packet HandlingPriority MEDIUM 41
    • TI-2026-26480 Unbounded Memory Growth in the QUIC PATH_CHALLENGE HandlerPriority MEDIUM 41
    Show all 18 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Multicluster Engine for KubernetesAffectedNo fix yet
Cert Manager support for Red Hat OpenShift release 1.17Fixed RHSA-2026:82304, RHSA-2026:82322, RHSA-2026:82888
Cert Manager support for Red Hat OpenShift release 1.18Fixed RHSA-2026:82347, RHSA-2026:82354, RHSA-2026:82372, RHSA-2026:82857
Cert Manager support for Red Hat OpenShift release 1.20Fixed RHSA-2026:72502
Cost Management 4Fixed RHSA-2026:39981
Red Hat Advanced Cluster Management for Kubernetes 2.13Fixed RHSA-2026:47737
Red Hat Discovery 2Fixed RHSA-2026:29197
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:25237
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:36215
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:25239, RHSA-2026:44438
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:36217
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:39012, RHSA-2026:84572
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:39009, RHSA-2026:84573
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:71542
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:35869, RHSA-2026:83617
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:36217
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:25237
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:26275
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:25239
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:26275
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:84572
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:84573
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:71542
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:83617
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:26275
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:26275
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:58563
Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)Fixed RHSA-2026:66524
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:58563
Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)Fixed RHSA-2026:66524
Red Hat Hardened ImagesFixed RHSA-2026:42825, RHSA-2026:55543, RHSA-2026:59635, RHSA-2026:59641, RHSA-2026:62562, RHSA-2026:62563, RHSA-2026:62790, RHSA-2026:67551
Red Hat Insights proxy 1.5Fixed RHSA-2026:34102
Red Hat JBoss Web Server 6.2.5Fixed RHSA-2026:73982
Red Hat JBoss Web Server 7.0.2Fixed RHSA-2026:76956
Red Hat OpenShift AI 3.0Fixed RHSA-2026:91206, RHSA-2026:91219, RHSA-2026:91232, RHSA-2026:91236, RHSA-2026:91243, RHSA-2026:94459, RHSA-2026:94476
Red Hat OpenShift AI 3.4Fixed RHSA-2026:91217, RHSA-2026:91218, RHSA-2026:91233, RHSA-2026:91234, RHSA-2026:91235, RHSA-2026:91241, RHSA-2026:91244, RHSA-2026:91245, RHSA-2026:91248, RHSA-2026:94468
Red Hat OpenShift AI 3.5Fixed RHSA-2026:91202, RHSA-2026:91204, RHSA-2026:91207, RHSA-2026:91224, RHSA-2026:91237, RHSA-2026:91238, RHSA-2026:91242, RHSA-2026:91246, RHSA-2026:91249, RHSA-2026:94474
Red Hat OpenShift Container Platform 4.12Fixed RHSA-2026:59831
Red Hat OpenShift Container Platform 4.19Fixed RHSA-2026:89651
Red Hat OpenShift Container Platform 4.20Fixed RHSA-2026:89333
Red Hat OpenShift Container Platform 4.21Fixed RHSA-2026:89232
Red Hat Update Infrastructure 5Fixed RHSA-2026:26319, RHSA-2026:58981
multicluster engine for Kubernetes 2.8Fixed RHSA-2026:47735
Not affected: 24 products
  • Cost Management 4
  • Red Hat Advanced Cluster Management for Kubernetes 2.13
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux AppStream (v. 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. 10.0)
  • Red Hat Enterprise Linux AppStream EUS (v.9.6)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2)
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0)
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6)
  • Red Hat Enterprise Linux Server (v. 7 ELS)
  • Red Hat Enterprise Linux Server -EXTENSION(v. 6 ELS-EXTENSION)
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS)
  • Red Hat Enterprise Linux Server Optional -EXTENSION (v. 6 ELS -EXTENSION)
  • Red Hat Hardened Images
  • Red Hat JBoss Core Services
  • Red Hat JBoss Web Server 6
  • Red Hat JBoss Web Server 7
  • Red Hat Update Infrastructure 5
  • multicluster engine for Kubernetes 2.8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45447
  2. 2026-10-03 Alias added: GHSA-f684-cpcq-j565
  3. 2026-10-07 Affected versions changed · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:76956 · Red Hat
  5. 2026-10-09 Fix available: Red Hat JBoss Web Server 7.0.2 · Red Hat
  6. 2026-10-14 Fix available: RHSA-2026:82304 · Red Hat
  7. 2026-10-14 Fix available: RHSA-2026:82322 · Red Hat
  8. 2026-10-14 Fix available: RHSA-2026:82372 · Red Hat
  9. 2026-10-14 Fix available: RHSA-2026:82354 · Red Hat
  10. 2026-10-14 Fix available: RHSA-2026:82347 · Red Hat
  11. 2026-10-15 Fix available: RHSA-2026:82857 · Red Hat
  12. 2026-10-15 Fix available: RHSA-2026:82888 · Red Hat
  13. 2026-10-16 Fix available: RHSA-2026:83617 · Red Hat
  14. 2026-10-16 Fix available: Cert Manager support for Red Hat OpenShift release 1.17, Cert Manager support for Red Hat OpenShift release 1.18, Red Hat Enterprise Linux BaseOS EUS (v.9.6) · Red Hat
  15. 2026-10-19 Fix available: RHSA-2026:84572 · Red Hat
  16. 2026-10-19 Fix available: Red Hat Enterprise Linux BaseOS E4S (v.9.2) · Red Hat
  17. 2026-10-19 Fix available: RHSA-2026:84573 · Red Hat
  18. 2026-10-20 Fix available: Red Hat Enterprise Linux BaseOS E4S (v.9.4) · Red Hat
  19. 2026-10-28 Fix available: Red Hat OpenShift Container Platform 4.19, Red Hat OpenShift Container Platform 4.20 · Red Hat
  20. 2026-10-29 Fix available: Red Hat OpenShift Container Platform 4.21 · Red Hat
  21. 2026-10-29 Fix available: RHSA-2026:89232 · Red Hat
  22. 2026-10-29 Fix available: RHSA-2026:89651 · Red Hat
  23. 2026-10-29 Fix available: RHSA-2026:89333 · Red Hat
  24. 2026-10-30 Fix available: RHSA-2026:91202 · Red Hat
  25. 2026-10-30 Fix available: RHSA-2026:91204 · Red Hat
  26. 2026-10-30 Fix available: RHSA-2026:91206 · Red Hat
  27. 2026-10-30 Fix available: RHSA-2026:91207 · Red Hat
  28. 2026-10-30 Fix available: RHSA-2026:91217 · Red Hat
  29. 2026-10-30 Fix available: RHSA-2026:91219 · Red Hat
  30. 2026-10-30 Fix available: RHSA-2026:91224 · Red Hat
  31. 2026-10-30 Fix available: RHSA-2026:91233 · Red Hat
  32. 2026-10-30 Fix available: RHSA-2026:91232 · Red Hat
  33. 2026-10-30 Fix available: RHSA-2026:91218 · Red Hat
  34. 2026-10-30 Fix available: RHSA-2026:91235 · Red Hat
  35. 2026-10-30 Fix available: RHSA-2026:91234 · Red Hat
  36. 2026-10-30 Fix available: RHSA-2026:91241 · Red Hat
  37. 2026-10-30 Fix available: RHSA-2026:91237 · Red Hat
  38. 2026-10-30 Fix available: RHSA-2026:91238 · Red Hat
  39. 2026-10-30 Fix available: RHSA-2026:91242 · Red Hat
  40. 2026-10-30 Fix available: RHSA-2026:91236 · Red Hat
  41. 2026-10-30 Fix available: RHSA-2026:91245 · Red Hat
  42. 2026-10-30 Fix available: RHSA-2026:91246 · Red Hat
  43. 2026-10-30 Fix available: RHSA-2026:91243 · Red Hat
  44. 2026-10-30 Fix available: RHSA-2026:91244 · Red Hat
  45. 2026-10-30 Fix available: RHSA-2026:91248 · Red Hat
  46. 2026-10-30 Fix available: RHSA-2026:91249 · Red Hat
  47. 2026-10-30 Fix available: Red Hat OpenShift AI 3.0, Red Hat OpenShift AI 3.4, Red Hat OpenShift AI 3.5 · Red Hat
  48. 2026-10-31 Affected versions changed · Red Hat
  49. 2026-11-03 Fix available: RHSA-2026:94459 · Red Hat
  50. 2026-11-03 Fix available: RHSA-2026:94468 · Red Hat
  51. 2026-11-03 Affected versions changed · Red Hat
  52. 2026-11-04 Fix available: RHSA-2026:94474 · Red Hat
  53. 2026-11-04 Fix available: RHSA-2026:94476 · Red Hat
  54. 2026-11-04 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