CVE-2026-28389

Publication date 7 April 2026

Last updated 9 April 2026

Ubuntu priority

Low

Why this priority?

Description

Issue summary: During processing of a crafted CMS EnvelopedData message with KeyAgreeRecipientInfo a NULL pointer dereference can happen. Impact summary: Applications that process attacker-controlled CMS data may crash before authentication or cryptographic operations occur resulting in Denial of Service. When a CMS EnvelopedData message that uses KeyAgreeRecipientInfo is processed, the optional parameters field of KeyEncryptionAlgorithmIdentifier is examined without checking for its presence. This results in a NULL pointer dereference if the field is missing. Applications and services that call CMS_decrypt() on untrusted input (e.g., S/MIME processing or CMS-based protocols) are vulnerable. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

Read the notes from the security team

Why is this CVE low priority?

OpenSSL developers have rated this issue as being low severity

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
openssl 25.10 questing
Fixed 3.5.3-1ubuntu3.3
24.04 LTS noble
Fixed 3.0.13-0ubuntu3.9
22.04 LTS jammy
Fixed 3.0.2-0ubuntu1.23
20.04 LTS focal
Fixed 1.1.1f-1ubuntu2.24+esm3
18.04 LTS bionic
Fixed 1.1.1-1ubuntu2.1~18.04.23+esm8
16.04 LTS xenial
Fixed 1.0.2g-1ubuntu4.20+esm15
14.04 LTS trusty
Not affected
openssl-fips 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
openssl1.0 25.10 questing Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Fixed 1.0.2n-1ubuntu5.13+esm4
nodejs 25.10 questing
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Vulnerable
20.04 LTS focal
Not affected
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Not affected
edk2 25.10 questing
Needs evaluation
24.04 LTS noble
Needs evaluation
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation

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Notes

mdeslaur

edk2 in jammy embeds OpenSSL 1.1.1j edk2 in noble embeds OpenSSL 3.0.9 edk2 in plucky embeds OpenSSL 3.4.0 edk2 in questing embeds OpenSSL 3.4.0 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.

References

Related Ubuntu Security Notices (USN)

Other references

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