CVE-2026-42766

CVE-2026-42766

Name

CVE-2026-42766

Description

Issue summary: A specially crafted password-encrypted CMS message can trigger a NULL pointer dereference during CMS decryption. Impact summary: This NULL pointer dereference leads to an application crash and a Denial of Service. The CMS PasswordRecipientInfo.keyDerivationAlgorithm field is defined as OPTIONAL in the ASN.1 specification and may therefore be absent in specially crafted inputs. During the password-based CMS decryption the OpenSSL CMS implementation dereferences this field without first checking whether it was present. An attacker who supplies such a CMS message to an application performing password-based CMS decryption can trigger an application crash, leading to a Denial of Service. Applications that process password-encrypted CMS 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.

NVD Severity

unknown

Other trackers

CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia

Mailing lists

oss-security, full-disclosure, bugtraq

Exploits

Exploit DB, Metasploit

Forges

GitHub (code, issues), Aports (code, issues)

Type	URI
openssl-security@openssl.org	https://github.com/openssl/security/commit/056d06c1918fafbb98c1c85a02e4c47cc4e199ce
openssl-security@openssl.org	https://github.com/openssl/security/commit/12bc26ffb3a2be728c9b86e1cae277de5b33dfa4
openssl-security@openssl.org	https://github.com/openssl/security/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea829d7
openssl-security@openssl.org	https://github.com/openssl/security/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7ce4
openssl-security@openssl.org	https://github.com/openssl/security/commit/da26f368732b83e40e9d356fe61c3d3aaab6d2e8
openssl-security@openssl.org	https://openssl-library.org/news/secadv/20260609.txt
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/056d06c1918fafbb98c1c85a02e4c47cc4e199ce
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/12bc26ffb3a2be728c9b86e1cae277de5b33dfa4
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea829d7
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7ce4
openssl-security@openssl.org	https://github.com/openssl/openssl/commit/da26f368732b83e40e9d356fe61c3d3aaab6d2e8

Type

URI

openssl-security@openssl.org

https://github.com/openssl/security/commit/056d06c1918fafbb98c1c85a02e4c47cc4e199ce

openssl-security@openssl.org

https://github.com/openssl/security/commit/12bc26ffb3a2be728c9b86e1cae277de5b33dfa4

openssl-security@openssl.org

https://github.com/openssl/security/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea829d7

openssl-security@openssl.org

https://github.com/openssl/security/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7ce4

openssl-security@openssl.org

https://github.com/openssl/security/commit/da26f368732b83e40e9d356fe61c3d3aaab6d2e8

openssl-security@openssl.org

https://openssl-library.org/news/secadv/20260609.txt

openssl-security@openssl.org

https://github.com/openssl/openssl/commit/056d06c1918fafbb98c1c85a02e4c47cc4e199ce

openssl-security@openssl.org

https://github.com/openssl/openssl/commit/12bc26ffb3a2be728c9b86e1cae277de5b33dfa4

openssl-security@openssl.org

https://github.com/openssl/openssl/commit/3ff64913615d648cfbb6a6f1cf5529ae7ea829d7

openssl-security@openssl.org

https://github.com/openssl/openssl/commit/ab52d88cb5374876d59aee3c91f9e4ccce2b7ce4

openssl-security@openssl.org

https://github.com/openssl/openssl/commit/da26f368732b83e40e9d356fe61c3d3aaab6d2e8

Match rules

CPE URI	Source package	Min version	Max version
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 1.0.2	< 1.0.2zq
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 1.1.1	< 1.1.1zh
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 3.0.0	< 3.0.21
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 3.4.0	< 3.4.6
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 3.5.0	< 3.5.7
`cpe:2.3:a:openssl:openssl::::::::`	openssl	>= 3.6.0	< 3.6.3
`cpe:2.3:a:openssl:openssl:4.0.0:-::::::`	openssl	== None	== 4.0.0

CPE URI

Source package

Min version

Max version