CVE-2026-45447
Detail
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.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
CWE-416
|
Use After Free |
OpenSSL Software Foundation
|
Change History
7 change records found show changes
CVE Modified by CISA-ADP
6/17/2026 6:52:04 AM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2026-06-10T03:59:38.212378Z","id":"CVE-2026-45447","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by OpenSSL Software Foundation
6/17/2026 6:52:04 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"OpenSSL","product":"OpenSSL","defaultStatus":"unaffected","versions":[{"version":"4.0.0","lessThan":"4.0.1","versionType":"semver","status":"affected"},{"version":"3.6.0","lessThan":"3.6.3","versionType":"semver","status":"affected"},{"version":"3.5.0","lessThan":"3.5.7","versionType":"semver","status":"affected"},{"version":"3.4.0","lessThan":"3.4.6","versionType":"semver","status":"affected"},{"version":"3.0.0","lessThan":"3.0.21","versionType":"semver","status":"affected"},{"version":"1.1.1","lessThan":"1.1.1zh","versionType":"custom","status":"affected"},{"version":"1.0.2","lessThan":"1.0.2zq","versionType":"custom","status":"affected"}]}]
|
Initial Analysis by NIST
6/15/2026 10:56:50 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
OR
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 1.0.2 up to (excluding) 1.0.2zq
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 1.1.1 up to (excluding) 1.1.1zh
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 3.0.0 up to (excluding) 3.0.21
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (excluding) 3.4.6
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (excluding) 3.5.7
*cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.3
*cpe:2.3:a:openssl:openssl:4.0.0:-:*:*:*:*:*:*
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://github.com/openssl/openssl/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63c Types: Patch
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://github.com/openssl/openssl/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8 Types: Patch
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://github.com/openssl/openssl/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54 Types: Patch
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://github.com/openssl/openssl/commit/a541ae8bfe849a30cc885e8780715c0f488e496c Types: Patch
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://github.com/openssl/openssl/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273e Types: Patch
|
| Added |
Reference Type |
OpenSSL Software Foundation: https://openssl-library.org/news/secadv/20260609.txt Types: Vendor Advisory
|
CVE Modified by CISA-ADP
6/10/2026 11:16:35 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
|
| Removed |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
CVE Modified by OpenSSL Software Foundation
6/10/2026 4:16:24 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://github.com/openssl/openssl/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63c
|
| Added |
Reference |
https://github.com/openssl/openssl/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8
|
| Added |
Reference |
https://github.com/openssl/openssl/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54
|
| Added |
Reference |
https://github.com/openssl/openssl/commit/a541ae8bfe849a30cc885e8780715c0f488e496c
|
| Added |
Reference |
https://github.com/openssl/openssl/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273e
|
| Removed |
Reference |
https://github.com/openssl/security/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63c
|
| Removed |
Reference |
https://github.com/openssl/security/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8
|
| Removed |
Reference |
https://github.com/openssl/security/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54
|
| Removed |
Reference |
https://github.com/openssl/security/commit/a541ae8bfe849a30cc885e8780715c0f488e496c
|
| Removed |
Reference |
https://github.com/openssl/security/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273e
|
CVE Modified by CISA-ADP
6/09/2026 4:16:58 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
New CVE Received from OpenSSL Software Foundation
6/09/2026 1:17:19 PM
| Action |
Type |
Old Value |
New Value |
| Added |
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.
|
| Added |
CWE |
CWE-416
|
| Added |
Reference |
https://github.com/openssl/security/commit/3aad5eb7af4de4ee0633c30a8541a54d9bbde63c
|
| Added |
Reference |
https://github.com/openssl/security/commit/7d4a980c62258c5910cc883936e0c8dbab4d75a8
|
| Added |
Reference |
https://github.com/openssl/security/commit/9dfd688ad2290fc5075cacbc9bf0c9a93eefed54
|
| Added |
Reference |
https://github.com/openssl/security/commit/a541ae8bfe849a30cc885e8780715c0f488e496c
|
| Added |
Reference |
https://github.com/openssl/security/commit/c505d7559da5d5f9f2c3913c6883a5562ce7273e
|
| Added |
Reference |
https://openssl-library.org/news/secadv/20260609.txt
|
Quick Info
CVE Dictionary Entry: CVE-2026-45447 NVD
Published Date: 06/09/2026 NVD
Last Modified: 06/17/2026
Source: OpenSSL Software Foundation
|
