CVE-2026-45447
Publication date 9 June 2026
Last updated 18 June 2026
Ubuntu priority
Description
Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When processing a PKCS#7 or S/MIME signed message, if the SignedData digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent use of the BIO by the calling application results in a use-after-free condition. In the common case this occurs when the application later calls BIO_free() on the BIO originally passed to PKCS7_verify(). Depending on allocator behavior and application-specific BIO usage patterns, this may result in a crash or other memory corruption. In some application contexts this may potentially be exploitable for remote code execution. Applications that process PKCS#7 or S/MIME signed messages using OpenSSL PKCS#7 APIs may be affected. Applications using the CMS APIs for this processing are not 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.
Read the notes from the security team
Why is this CVE high priority?
OpenSSL developers have rated this as being high severity
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| edk2 | 26.04 LTS resolute |
Needs evaluation
|
| 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
|
|
| nodejs | 26.04 LTS resolute |
Not affected
|
| 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
|
|
| 14.04 LTS trusty |
Not affected
|
|
| openssl | 26.04 LTS resolute |
Fixed 3.5.5-1ubuntu3.2
|
| 25.10 questing |
Fixed 3.5.3-1ubuntu3.4
|
|
| 24.04 LTS noble |
Fixed 3.0.13-0ubuntu3.11
|
|
| 22.04 LTS jammy |
Fixed 3.0.2-0ubuntu1.25
|
|
| 20.04 LTS focal |
Fixed 1.1.1f-1ubuntu2.24+esm4
|
|
| 18.04 LTS bionic |
Fixed 1.1.1-1ubuntu2.1~18.04.23+esm9
|
|
| 16.04 LTS xenial |
Fixed 1.0.2g-1ubuntu4.20+esm16
|
|
| 14.04 LTS trusty |
Fixed 1.0.1f-1ubuntu2.27+esm14
|
|
| openssl-fips | 26.04 LTS resolute | Not in release |
| 25.10 questing | Not in release | |
| 24.04 LTS noble | Not in release | |
| 22.04 LTS jammy | Not in release | |
| openssl1.0 | 26.04 LTS resolute | Not in release |
| 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+esm5
|
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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 nodejs in jammy embeds OpenSSL 1.1.1m OpenSSL 4.0, 3.6, 3.5, 3.4, 3.0, 1.1.1, and 1.0.2 are vulnerable to this issue.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
8.8 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8414-2
- OpenSSL vulnerabilities
- 9 June 2026
- USN-8414-1
- OpenSSL vulnerabilities
- 9 June 2026