Possible NULL Dereference in Password-Based CMS Decryption
CVE-2026-42766 is fixed in 20 products on 1 platform, first by libssl3t64 3.5.5-1ubuntu3.2, released June 8, 2026. It is not reported as exploited. Patch Radar priority: High.
This update for openssl-3 fixes the following issues - CVE-2026-7383: Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion (bsc#1266340). - CVE-2026-9076: Out-of-Bounds Read in CMS Password-Based Decryption (bsc#1266341). - CVE-2026-34180: Heap Buffer Over-read in ASN.1 Content Parsing (bsc#1266342). - CVE-2026-34182: CMS AuthEnvelopedData Processing May Accept Forged Messages (bsc#1266344). - CVE-2026-42766: Possible NULL Dereference in Password-Based CMS Decryption (bsc#1266349). - CVE-2026-42770: FFC-DH Peer Validation Uses Attacker-Supplied q (bsc#1266353). - CVE-2026-45445: AES-OCB IV Ignored on EVP_Cipher() Path (bsc#1266355). - CVE-2026-45446: Incorrect Tag Processing for Empty Messages in AES-GCM-SIV and AES-SIV modes (bsc#1266356). - CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify() (bsc#1266357).
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libssl1.0.0 · Ubuntu 18.04.6 LTS (bionic) | 1.0.2n-1ubuntu5.13+esm5 | libssl1.0.0 1.0.2n-1ubuntu5.13+esm5 | Jun 24, 2026 |
| libssl1.1 · Ubuntu 18.04.6 LTS (bionic) | 1.1.1-1ubuntu2.1~18.04.23+esm9 | libssl1.1 1.1.1-1ubuntu2.1~18.04.23+esm9 | Jun 24, 2026 |
| libssl1.1 · Ubuntu 20.04 LTS (focal) | 1.1.1f-1ubuntu2.24+esm4 | libssl1.1 1.1.1f-1ubuntu2.24+esm4 | Jun 24, 2026 |
| libssl3 · Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.25 | libssl3 3.0.2-0ubuntu1.25 | Jun 24, 2026 |
| libssl3t64 · Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.11 | libssl3t64 3.0.13-0ubuntu3.11 | Jun 24, 2026 |
| libssl3t64 · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3.4 | libssl3t64 3.5.3-1ubuntu3.4 | Jun 24, 2026 |
| libssl3t64 · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu3.2 | libssl3t64 3.5.5-1ubuntu3.2 | Jun 8, 2026 |
| openssl · Debian 12.15 (bookworm) | 3.0.20-1~deb12u2 | DEBIAN-CVE-2026-42766 | Jun 24, 2026 |
| openssl · Debian 13.5 (trixie) | 3.5.6-1~deb13u2 | DEBIAN-CVE-2026-42766 | Jun 24, 2026 |
| openssl · Debian 14 | 3.6.3-1 | DEBIAN-CVE-2026-42766 | Jun 24, 2026 |
| openssl · RHEL 10 | 3.5.5-4.el10_2 | RHSA-2026:25237 | Jun 24, 2026 |
| openssl · RHEL 9 | 1:3.5.5-4.el9_8 | RHSA-2026:25239 | Jun 24, 2026 |
| openssl · Ubuntu 18.04.6 LTS (bionic) | 1.1.1-1ubuntu2.1~18.04.23+esm9 | openssl 1.1.1-1ubuntu2.1~18.04.23+esm9 | Jun 24, 2026 |
| openssl · Ubuntu 20.04 LTS (focal) | 1.1.1f-1ubuntu2.24+esm4 | openssl 1.1.1f-1ubuntu2.24+esm4 | Jun 24, 2026 |
| openssl · Ubuntu 22.04.1 LTS (jammy) | 3.0.2-0ubuntu1.25 | openssl 3.0.2-0ubuntu1.25 | Jun 24, 2026 |
| openssl · Ubuntu 24.04.5 LTS (noble) | 3.0.13-0ubuntu3.11 | openssl 3.0.13-0ubuntu3.11 | Jun 24, 2026 |
| openssl · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3.4 | openssl 3.5.3-1ubuntu3.4 | Jun 24, 2026 |
| openssl · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu3.2 | openssl 3.5.5-1ubuntu3.2 | Jun 8, 2026 |
| openssl · almalinux 10 | 1:3.5.5-4.el10_2.alma.1 | ALSA-2026:25237 | Jun 11, 2026 |
| openssl · almalinux 9 | 1:3.5.5-4.el9_8 | ALSA-2026:25239 | Jun 11, 2026 |
| openssl · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl · ol 10 | 1:3.5.5-5.0.1.el10_2 | ELSA-2026-25237 | Jul 28, 2026 |
| openssl · ol 9 | 1:3.5.5-4.0.1.el9_8 | ELSA-2026-25239 | Jun 23, 2026 |
| openssl · rocky 10 | 1:3.5.5-4.el10_2 | RLSA-2026:25237 | Jun 13, 2026 |
| openssl · rocky 9 | 1:3.5.5-4.el9_8 | RLSA-2026:25239 | Jun 13, 2026 |
| openssl-1_0_0 · sles 15.6 | 1.0.2p-150000.3.108.1 | SUSE-SU-2026:2399-1 | Jun 15, 2026 |
| openssl-1_0_0 · sles 15.7 | 1.0.2p-150000.3.108.1 | SUSE-SU-2026:2399-1 | Jun 15, 2026 |
| openssl-1_1 · sles 15.6 | 1.1.1w-150600.5.32.1 | SUSE-SU-2026:2404-1 | Jun 16, 2026 |
| openssl-1_1 · sles 15.7 | 1.1.1w-150700.11.22.1 | SUSE-SU-2026:2392-1 | Jun 15, 2026 |
| openssl-3 · opensuse-leap 16.0 | 3.5.0-160000.8.1 | OPENSUSE-SU-2026:21005-1 | Jun 22, 2026 |
| openssl-3 · sles 15.6 | 3.1.4-150600.5.53.1 | SUSE-SU-2026:2393-1 | Jun 15, 2026 |
| openssl-3 · sles 15.7 | 3.2.3-150700.5.36.1 | SUSE-SU-2026:2648-1 | Jun 26, 2026 |
| openssl-3 · sles 16.0 | 3.5.0-160000.8.1 | SUSE-SU-2026:22315-1 | Jun 22, 2026 |
| openssl-debuginfo · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-debugsource · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-devel · RHEL 9 | 1:3.5.5-4.el9_8 | RHSA-2026:25239 | Jun 24, 2026 |
| openssl-devel · almalinux 10 | 1:3.5.5-4.el10_2.alma.1 | ALSA-2026:25237 | Jun 11, 2026 |
| openssl-devel · almalinux 9 | 1:3.5.5-4.el9_8 | ALSA-2026:25239 | Jun 11, 2026 |
| openssl-devel · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-devel · ol 10 | 1:3.5.5-5.0.1.el10_2 | ELSA-2026-25237 | Jul 28, 2026 |
| openssl-devel · ol 9 | 1:3.5.5-4.0.1.el9_8 | ELSA-2026-25239 | Jun 23, 2026 |
| openssl-fips-provider-latest · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-fips-provider-latest-debuginfo · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-libs · RHEL 9 | 1:3.5.5-4.el9_8 | RHSA-2026:25239 | Jun 24, 2026 |
| openssl-libs · almalinux 10 | 1:3.5.5-4.el10_2.alma.1 | ALSA-2026:25237 | Jun 11, 2026 |
| openssl-libs · almalinux 9 | 1:3.5.5-4.el9_8 | ALSA-2026:25239 | Jun 11, 2026 |
| openssl-libs · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-libs · ol 10 | 1:3.5.5-5.0.1.el10_2 | ELSA-2026-25237 | Jul 28, 2026 |
| openssl-libs · ol 9 | 1:3.5.5-4.0.1.el9_8 | ELSA-2026-25239 | Jun 23, 2026 |
| openssl-libs-debuginfo · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-perl · RHEL 9 | 1:3.5.5-4.el9_8 | RHSA-2026:25239 | Jun 24, 2026 |
| openssl-perl · almalinux 10 | 1:3.5.5-4.el10_2.alma.1 | ALSA-2026:25237 | Jun 11, 2026 |
| openssl-perl · almalinux 9 | 1:3.5.5-4.el9_8 | ALSA-2026:25239 | Jun 11, 2026 |
| openssl-perl · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-perl · ol 10 | 1:3.5.5-5.0.1.el10_2 | ELSA-2026-25237 | Jul 28, 2026 |
| openssl-perl · ol 9 | 1:3.5.5-4.0.1.el9_8 | ELSA-2026-25239 | Jun 23, 2026 |
| openssl-provider-legacy · Ubuntu 25.10 (questing) | 3.5.3-1ubuntu3.4 | openssl-provider-legacy 3.5.3-1ubuntu3.4 | Jun 24, 2026 |
| openssl-provider-legacy · Ubuntu 26.04.1 LTS (resolute) | 3.5.5-1ubuntu3.2 | openssl-provider-legacy 3.5.5-1ubuntu3.2 | Jun 8, 2026 |
| openssl-snapsafe-libs · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl-snapsafe-libs-debuginfo · amzn 2023 | 1:3.5.5-1.amzn2023.0.5 | ALAS2023-2026-1853 | Jun 22, 2026 |
| openssl1.0 · Ubuntu 18.04.6 LTS (bionic) | 1.0.2n-1ubuntu5.13+esm5 | openssl1.0 1.0.2n-1ubuntu5.13+esm5 | Jun 24, 2026 |
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