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CVE-2026-42767

CVE-2026-42767 · NULL Pointer Dereference in CRMF EncryptedValue Decryption

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Issue summary: An attacker-controlled CMP (Certificate Management Protocol) server could trigger a NULL pointer dereference in a CMP client application. Impact summary: A NULL pointer dereference causes a crash of the application and a Denial of Service. An attacker controlling a CMP server (or acting as a man-in-the-middle) could craft a CMP response containing a CRMF (Certificate Request Message Format) CertRepMessage with an EncryptedValue structure where the symmAlg field has an algorithm OID but no parameters field. When the OpenSSL CMP client processes this response, the NULL dereference occurs, causing a crash of the CMP client. Applications that process untrusted CMP/CRMF messages may be 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.

CVSS 5.9 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system · network

Affected products and versions

  • openssl

    Versions
    • ≥ 4.0.0, < 4.0.1: Affected (semver)
    • ≥ 3.6.0, < 3.6.3: Affected (semver)
    • ≥ 3.5.0, < 3.5.7: Affected (semver)
    • ≥ 3.4.0, < 3.4.6: Affected (semver)
    • ≥ 3.0.0, < 3.0.21: Affected (semver)

    Update to 3.0.21; Update to 3.4.6; Update to 3.5.7; Update to 3.6.3; Update to 4.0.1

  • openssl Debian:12

    Versions
    • 3.0.10-1
    • 3.0.10-1~deb12u1
    • 3.0.11-1
    • 3.0.11-1~deb12u1
    • 3.0.11-1~deb12u2
    • 3.0.12-1
    • 3.0.12-2
    • 3.0.13-1~deb12u1
    • 3.0.13-1~deb12u2
    • 3.0.14-1~deb12u1
    • 3.0.14-1~deb12u2
    • 3.0.15-1~deb12u1
    • 3.0.16-1~deb12u1
    • 3.0.17-1~deb12u1
    • 3.0.17-1~deb12u2
    • 3.0.17-1~deb12u3
    • 3.0.18-1~deb12u1
    • 3.0.18-1~deb12u2
    • 3.0.19-1~deb12u1
    • 3.0.19-1~deb12u2
    • 3.0.20-1~deb12u1
    • 3.0.20-1~deb12u2
    • 3.0.9-1
    Affected ranges
    • ECOSYSTEM: < 3.0.22-1~deb12u1

    Update to 3.0.22-1~deb12u1

  • openssl Debian:13

    Versions
    • 3.5.1-1
    • 3.5.1-1+deb13u1
    • 3.5.2-1
    • 3.5.3-1
    • 3.5.4-1
    • 3.5.4-1~deb13u1
    • 3.5.4-1~deb13u2
    • 3.5.5-1
    • 3.5.5-1~deb13u1
    • 3.5.5-1~deb13u2
    • 3.5.6-1~deb13u1
    Affected ranges
    • ECOSYSTEM: < 3.5.6-1~deb13u2

    Update to 3.5.6-1~deb13u2

  • openssl Debian:14

    Versions
    • 3.5.1-1
    • 3.5.2-1
    • 3.5.3-1
    • 3.5.4-1
    • 3.5.4-1~deb13u1
    • 3.5.4-1~deb13u2
    • 3.5.5-1
    • 3.5.5-1~deb13u1
    • 3.5.5-1~deb13u2
    • 3.5.6-1~deb13u1
    • 3.5.6-1~deb13u2
    • 3.5.7-1~deb13u1
    • 3.5.7-1~deb13u2
    • 3.5.7-1~deb13u3
    • 3.6.0-1
    • 3.6.0-2
    • 3.6.0~~alpha1-1
    • 3.6.0~~beta1-1
    • 3.6.1-1
    • 3.6.1-2
    • 3.6.1-3
    • 3.6.2-1
    Affected ranges
    • ECOSYSTEM: < 3.6.3-1

    Update to 3.6.3-1

  • openssl Ubuntu:22.04:LTS

    Versions
    • 1.1.1l-1ubuntu1
    • 3.0.0-1ubuntu1
    • 3.0.1-0ubuntu1
    • 3.0.2-0ubuntu1
    • 3.0.2-0ubuntu1.1
    • 3.0.2-0ubuntu1.2
    • 3.0.2-0ubuntu1.4
    • 3.0.2-0ubuntu1.5
    • 3.0.2-0ubuntu1.6
    • 3.0.2-0ubuntu1.7
    • 3.0.2-0ubuntu1.8
    • 3.0.2-0ubuntu1.9
    • 3.0.2-0ubuntu1.10
    • 3.0.2-0ubuntu1.12
    • 3.0.2-0ubuntu1.13
    • 3.0.2-0ubuntu1.14
    • 3.0.2-0ubuntu1.15
    • 3.0.2-0ubuntu1.16
    • 3.0.2-0ubuntu1.17
    • 3.0.2-0ubuntu1.18
    • 3.0.2-0ubuntu1.19
    • 3.0.2-0ubuntu1.20
    • 3.0.2-0ubuntu1.21
    • 3.0.2-0ubuntu1.23
    Affected ranges
    • ECOSYSTEM: < 3.0.2-0ubuntu1.25

    Update to 3.0.2-0ubuntu1.25

  • nodejs Ubuntu:Pro:22.04:LTS

    Versions
    • 12.22.5~dfsg-5ubuntu1
    • 12.22.7~dfsg-2ubuntu1
    • 12.22.7~dfsg-2ubuntu3
    • 12.22.9~dfsg-1ubuntu2
    • 12.22.9~dfsg-1ubuntu3
    • 12.22.9~dfsg-1ubuntu3.1
    • 12.22.9~dfsg-1ubuntu3.2
    • 12.22.9~dfsg-1ubuntu3.3
    • 12.22.9~dfsg-1ubuntu3.4
    • 12.22.9~dfsg-1ubuntu3.5
    • 12.22.9~dfsg-1ubuntu3.6
    • 12.22.9~dfsg-1ubuntu3.6+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:Pro:FIPS-preview:22.04:LTS

    Versions
    • 3.0.2-0ubuntu1.10+Fips1
    • 3.0.2-0ubuntu1.12+Fips1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl-fips Ubuntu:Pro:FIPS-preview:22.04:LTS

    Versions
    • 3.0.5-0ubuntu0.1+Fips2.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:Pro:FIPS-updates:22.04:LTS

    Versions
    • 3.0.2-0ubuntu1.10+Fips1
    • 3.0.2-0ubuntu1.12+Fips1
    • 3.0.2-0ubuntu1.14+Fips1
    • 3.0.2-0ubuntu1.15+Fips1
    • 3.0.2-0ubuntu1.16+Fips1
    • 3.0.2-0ubuntu1.17+Fips1
    • 3.0.2-0ubuntu1.18+Fips1
    • 3.0.2-0ubuntu1.19+Fips1
    • 3.0.2-0ubuntu1.20+Fips1
    • 3.0.2-0ubuntu1.21+Fips1
    • 3.0.2-0ubuntu1.23+Fips1
    Affected ranges
    • ECOSYSTEM: < 3.0.2-0ubuntu1.25+Fips1

    Update to 3.0.2-0ubuntu1.25+Fips1

  • openssl-fips Ubuntu:Pro:FIPS-updates:22.04:LTS

    Versions
    • 3.0.5-0ubuntu0.1+Fips2.1
    • 3.0.5-0ubuntu0.2+Fips1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • edk2 Ubuntu:24.04:LTS

    Versions
    • 2023.05-2
    • 2023.11-2
    • 2023.11-3
    • 2023.11-4
    • 2023.11-5
    • 2023.11-6
    • 2023.11-8
    • 2024.02-1
    • 2024.02-2
    • 2024.02-2ubuntu0.1
    • 2024.02-2ubuntu0.3
    • 2024.02-2ubuntu0.4
    • 2024.02-2ubuntu0.5
    • 2024.02-2ubuntu0.6
    • 2024.02-2ubuntu0.7
    • 2024.02-2ubuntu0.8
    • 2024.02-2ubuntu0.9
    • 2024.02-2ubuntu0.10
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:24.04:LTS

    Versions
    • 3.0.10-1ubuntu2
    • 3.0.10-1ubuntu2.1
    • 3.0.10-1ubuntu3
    • 3.0.10-1ubuntu4
    • 3.0.13-0ubuntu2
    • 3.0.13-0ubuntu3
    • 3.0.13-0ubuntu3.1
    • 3.0.13-0ubuntu3.2
    • 3.0.13-0ubuntu3.3
    • 3.0.13-0ubuntu3.4
    • 3.0.13-0ubuntu3.5
    • 3.0.13-0ubuntu3.6
    • 3.0.13-0ubuntu3.7
    • 3.0.13-0ubuntu3.9
    Affected ranges
    • ECOSYSTEM: < 3.0.13-0ubuntu3.11

    Update to 3.0.13-0ubuntu3.11

  • openssl-fips Ubuntu:Pro:FIPS-updates:24.04:LTS

    Versions
    • 3.0.13-0ubuntu3+Fips1
    • 3.0.13-0ubuntu3.6+Fips1
    Affected ranges
    • ECOSYSTEM: < 3.0.13-0ubuntu3.12+Fips1

    Update to 3.0.13-0ubuntu3.12+Fips1

  • edk2 Ubuntu:25.10

    Versions
    • 2025.02-3ubuntu2
    • 2025.02-8
    • 2025.02-8ubuntu1
    • 2025.02-8ubuntu2
    • 2025.02-8ubuntu3
    • 2025.02-8ubuntu3.1
    • 2025.02-8ubuntu3.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:25.10

    Versions
    • 3.4.1-1ubuntu3
    • 3.5.0-2ubuntu1
    • 3.5.2-1ubuntu1
    • 3.5.3-1ubuntu2
    • 3.5.3-1ubuntu3
    • 3.5.3-1ubuntu3.3
    Affected ranges
    • ECOSYSTEM: < 3.5.3-1ubuntu3.4

    Update to 3.5.3-1ubuntu3.4

  • edk2 Ubuntu:26.10

    Versions
    • 2025.11-3ubuntu7
    • 2025.11-3ubuntu8
    • 2026.05-2ubuntu1
    • 2026.05-2ubuntu2
    • 2026.05-2ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • edk2-hwe Ubuntu:26.10

    Versions
    • 2025.11-3ubuntu8
    • 2025.11-3ubuntu9
    • 2026.05-2ubuntu1
    • 2026.05-2ubuntu2
    • 2026.05-2ubuntu3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • edk2 Ubuntu:26.04:LTS

    Versions
    • 2025.02-8ubuntu3
    • 2025.11-3ubuntu6
    • 2025.11-3ubuntu7
    • 2025.11-3ubuntu7.2
    • 2025.11-3ubuntu7.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • edk2-hwe Ubuntu:26.04:LTS

    Versions
    • 2025.11-3ubuntu6
    • 2025.11-3ubuntu8
    • 2025.11-3ubuntu8.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:26.04:LTS

    Versions
    • 3.5.3-1ubuntu2
    • 3.5.5-1ubuntu1
    • 3.5.5-1ubuntu3
    Affected ranges
    • ECOSYSTEM: < 3.5.5-1ubuntu3.2

    Update to 3.5.5-1ubuntu3.2

Original sources

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