CVE-2026-22795

Publication date 27 January 2026

Last updated 28 January 2026

Ubuntu priority

Low

Why this priority?

Description

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.

Read the notes from the security team

Why is this CVE low priority?

OpenSSL developers have rated this issue to be low severity

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
openssl 25.10 questing
Fixed 3.5.3-1ubuntu3
25.04 plucky Ignored end of life, was needed
24.04 LTS noble
Fixed 3.0.13-0ubuntu3.7
22.04 LTS jammy
Fixed 3.0.2-0ubuntu1.21
20.04 LTS focal
Fixed 1.1.1f-1ubuntu2.24+esm2
18.04 LTS bionic
Fixed 1.1.1-1ubuntu2.1~18.04.23+esm7
16.04 LTS xenial  
Not affected
14.04 LTS trusty
Not affected
openssl1.0 25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Not affected
nodejs 25.10 questing
Not affected
25.04 plucky
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
25.04 plucky Ignored end of life, was needs-triage
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 and 1.1.1 are vulnerable

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
openssl

References

Related Ubuntu Security Notices (USN)

    • USN-7980-1
    • OpenSSL vulnerabilities
    • 27 January 2026
    • USN-7980-2
    • OpenSSL vulnerabilities
    • 27 January 2026

Other references