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CVE-2026-22795

CVE-2026-22795 · Missing ASN1_TYPE validation in PKCS#12 parsing

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

Issue summary: An invalid or NULL pointer dereference can happen in an application processing a malformed PKCS#12 file. Impact summary: An application processing a malformed PKCS#12 file can be caused to dereference an invalid or NULL pointer on memory read, resulting in a Denial of Service. A type confusion vulnerability exists in PKCS#12 parsing code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid pointer read. The location is constrained to a 1-byte address space, meaning any attempted pointer manipulation can only target addresses between 0x00 and 0xFF. This range corresponds to the zero page, which is unmapped on most modern operating systems and will reliably result in a crash, leading only to a Denial of Service. Exploiting this issue also requires a user or application to process a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted PKCS#12 files in applications as they are usually used to store private keys which are trusted by definition. For these reasons, the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS12 implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue. OpenSSL 1.0.2 is not affected by this issue.

CVSS 5.5 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system · network

Affected products and versions

  • openssl

    Versions
    • ≥ 3.6.0, < 3.6.1: Affected (semver)
    • ≥ 3.5.0, < 3.5.5: Affected (semver)
    • ≥ 3.4.0, < 3.4.4: Affected (semver)
    • ≥ 3.3.0, < 3.3.6: Affected (semver)
    • ≥ 3.0.0, < 3.0.19: Affected (semver)
    • ≥ 1.1.1, < 1.1.1ze: Affected (custom)

    Update to 1.1.1ze; Update to 3.0.19; Update to 3.3.6; Update to 3.4.4; Update to 3.5.5; Update to 3.6.1

  • 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
    • 3.0.9-1
    Affected ranges
    • ECOSYSTEM: < 3.0.18-1~deb12u2

    Update to 3.0.18-1~deb12u2

  • 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~deb13u1
    Affected ranges
    • ECOSYSTEM: < 3.5.4-1~deb13u2

    Update to 3.5.4-1~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~deb13u1
    • 3.5.5-1~deb13u2
    Affected ranges
    • ECOSYSTEM: < 3.5.5-1

    Update to 3.5.5-1

  • nodejs Ubuntu:Pro:16.04:LTS

    Versions
    • 0.10.25~dfsg2-2ubuntu1
    • 4.2.2~dfsg-1
    • 4.2.3~dfsg-1
    • 4.2.4~dfsg-1ubuntu1
    • 4.2.4~dfsg-2
    • 4.2.6~dfsg-1ubuntu1
    • 4.2.6~dfsg-1ubuntu4
    • 4.2.6~dfsg-1ubuntu4.1
    • 4.2.6~dfsg-1ubuntu4.2
    • 4.2.6~dfsg-1ubuntu4.2+esm1
    • 4.2.6~dfsg-1ubuntu4.2+esm2
    • 4.2.6~dfsg-1ubuntu4.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:Pro:18.04:LTS

    Versions
    • 1.0.2g-1ubuntu13
    • 1.0.2g-1ubuntu14
    • 1.0.2n-1ubuntu1
    • 1.1.0g-2ubuntu1
    • 1.1.0g-2ubuntu2
    • 1.1.0g-2ubuntu3
    • 1.1.0g-2ubuntu4
    • 1.1.0g-2ubuntu4.1
    • 1.1.0g-2ubuntu4.3
    • 1.1.1-1ubuntu2.1~18.04.1
    • 1.1.1-1ubuntu2.1~18.04.2
    • 1.1.1-1ubuntu2.1~18.04.3
    • 1.1.1-1ubuntu2.1~18.04.4
    • 1.1.1-1ubuntu2.1~18.04.5
    • 1.1.1-1ubuntu2.1~18.04.6
    • 1.1.1-1ubuntu2.1~18.04.7
    • 1.1.1-1ubuntu2.1~18.04.8
    • 1.1.1-1ubuntu2.1~18.04.9
    • 1.1.1-1ubuntu2.1~18.04.10
    • 1.1.1-1ubuntu2.1~18.04.13
    • 1.1.1-1ubuntu2.1~18.04.14
    • 1.1.1-1ubuntu2.1~18.04.15
    • 1.1.1-1ubuntu2.1~18.04.17
    • 1.1.1-1ubuntu2.1~18.04.19
    • 1.1.1-1ubuntu2.1~18.04.20
    • 1.1.1-1ubuntu2.1~18.04.21
    • 1.1.1-1ubuntu2.1~18.04.22
    • 1.1.1-1ubuntu2.1~18.04.23
    • 1.1.1-1ubuntu2.1~18.04.23+esm1
    • 1.1.1-1ubuntu2.1~18.04.23+esm3
    • 1.1.1-1ubuntu2.1~18.04.23+esm4
    • 1.1.1-1ubuntu2.1~18.04.23+esm5
    • 1.1.1-1ubuntu2.1~18.04.23+esm6
    Affected ranges
    • ECOSYSTEM: < 1.1.1-1ubuntu2.1~18.04.23+esm7

    Update to 1.1.1-1ubuntu2.1~18.04.23+esm7

  • nodejs Ubuntu:Pro:18.04:LTS

    Versions
    • 6.11.4~dfsg-1ubuntu1
    • 6.11.4~dfsg-1ubuntu2
    • 6.12.0~dfsg-1ubuntu1
    • 6.12.0~dfsg-2ubuntu1
    • 6.12.0~dfsg-2ubuntu2
    • 8.10.0~dfsg-2
    • 8.10.0~dfsg-2ubuntu0.2
    • 8.10.0~dfsg-2ubuntu0.3
    • 8.10.0~dfsg-2ubuntu0.4
    • 8.10.0~dfsg-2ubuntu0.4+esm1
    • 8.10.0~dfsg-2ubuntu0.4+esm2
    • 8.10.0~dfsg-2ubuntu0.4+esm3
    • 8.10.0~dfsg-2ubuntu0.4+esm4
    • 8.10.0~dfsg-2ubuntu0.4+esm5
    • 8.10.0~dfsg-2ubuntu0.4+esm6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:Pro:FIPS-updates:18.04:LTS

    Versions
    • 1.1.1-1ubuntu2.fips.2.1~18.04.5.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.6.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.7.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.9.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.9.2
    • 1.1.1-1ubuntu2.fips.2.1~18.04.9.3
    • 1.1.1-1ubuntu2.fips.2.1~18.04.13.2
    • 1.1.1-1ubuntu2.fips.2.1~18.04.15
    • 1.1.1-1ubuntu2.fips.2.1~18.04.15.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.15.2
    • 1.1.1-1ubuntu2.fips.2.1~18.04.17
    • 1.1.1-1ubuntu2.fips.2.1~18.04.20
    • 1.1.1-1ubuntu2.fips.2.1~18.04.21
    • 1.1.1-1ubuntu2.fips.2.1~18.04.22
    • 1.1.1-1ubuntu2.fips.2.1~18.04.23
    • 1.1.1-1ubuntu2.fips.2.1~18.04.23.3
    • 1.1.1-1ubuntu2.fips.2.1~18.04.23.4
    • 1.1.1-1ubuntu2.fips.2.1~18.04.23.5
    • 1.1.1-1ubuntu2.fips.2.1~18.04.23.6
    Affected ranges
    • ECOSYSTEM: < 1.1.1-1ubuntu2.fips.2.1~18.04.23.7

    Update to 1.1.1-1ubuntu2.fips.2.1~18.04.23.7

  • openssl Ubuntu:Pro:FIPS:18.04:LTS

    Versions
    • 1.1.1-1ubuntu2.fips.2.1~18.04.3.1
    • 1.1.1-1ubuntu2.fips.2.1~18.04.15.2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • openssl Ubuntu:Pro:20.04:LTS

    Versions
    • 1.1.1c-1ubuntu4
    • 1.1.1d-2ubuntu3
    • 1.1.1d-2ubuntu6
    • 1.1.1f-1ubuntu1
    • 1.1.1f-1ubuntu2
    • 1.1.1f-1ubuntu2.1
    • 1.1.1f-1ubuntu2.2
    • 1.1.1f-1ubuntu2.3
    • 1.1.1f-1ubuntu2.4
    • 1.1.1f-1ubuntu2.5
    • 1.1.1f-1ubuntu2.8
    • 1.1.1f-1ubuntu2.9
    • 1.1.1f-1ubuntu2.10
    • 1.1.1f-1ubuntu2.11
    • 1.1.1f-1ubuntu2.12
    • 1.1.1f-1ubuntu2.13
    • 1.1.1f-1ubuntu2.15
    • 1.1.1f-1ubuntu2.16
    • 1.1.1f-1ubuntu2.17
    • 1.1.1f-1ubuntu2.18
    • 1.1.1f-1ubuntu2.19
    • 1.1.1f-1ubuntu2.20
    • 1.1.1f-1ubuntu2.21
    • 1.1.1f-1ubuntu2.22
    • 1.1.1f-1ubuntu2.23
    • 1.1.1f-1ubuntu2.24
    • 1.1.1f-1ubuntu2.24+esm1
    Affected ranges
    • ECOSYSTEM: < 1.1.1f-1ubuntu2.24+esm2

    Update to 1.1.1f-1ubuntu2.24+esm2

  • openssl Ubuntu:Pro:FIPS-updates:20.04:LTS

    Versions
    • 1.1.1f-1ubuntu2.fips.7
    • 1.1.1f-1ubuntu2.fips.7.2
    • 1.1.1f-1ubuntu2.fips.12
    • 1.1.1f-1ubuntu2.fips.13
    • 1.1.1f-1ubuntu2.fips.13.1
    • 1.1.1f-1ubuntu2.fips.16
    • 1.1.1f-1ubuntu2.fips.17
    • 1.1.1f-1ubuntu2.fips.18
    • 1.1.1f-1ubuntu2.fips.19
    • 1.1.1f-1ubuntu2.fips.20
    • 1.1.1f-1ubuntu2.fips.21
    • 1.1.1f-1ubuntu2.fips.22
    • 1.1.1f-1ubuntu2.fips.24
    • 1.1.1f-1ubuntu2.fips.24.1
    Affected ranges
    • ECOSYSTEM: < 1.1.1f-1ubuntu2.fips.24.2

    Update to 1.1.1f-1ubuntu2.fips.24.2

  • openssl Ubuntu:Pro:FIPS:20.04:LTS

    Versions
    • 1.1.1f-1ubuntu2.fips.2.8
    • 1.1.1f-1ubuntu2.fips.7.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • 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
    Affected ranges
    • ECOSYSTEM: < 3.0.2-0ubuntu1.21

    Update to 3.0.2-0ubuntu1.21

  • 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
    Affected ranges
    • ECOSYSTEM: < 3.0.2-0ubuntu1.21+Fips1

    Update to 3.0.2-0ubuntu1.21+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

  • 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
    Affected ranges
    • ECOSYSTEM: < 3.0.13-0ubuntu3.7

    Update to 3.0.13-0ubuntu3.7

  • 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

  • openssl Ubuntu:25.10

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

    Update to 3.5.3-1ubuntu3

  • openssl Ubuntu:26.04:LTS

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

    Update to 3.5.5-1ubuntu1

Original sources

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