---
schema_version: '1.0'
id: security-20260705-03d023
url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-45447
url_hash: 03d023b6d5f153963d7081d2a3e40fefefa1a5e517ce9d8a4d9f55ea5f2a34e2
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-45447
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2026-45447
- severity:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- openssl
- Debian
lang: en
published_at: '2026-06-09T17:17:19Z'
fetched_at: '2026-07-05T15:34:34Z'
updated_at: '2026-07-05T15:37:03Z'
status: published
content_hash: cf77ca90f7cf8a5c5b741b96e0e7250335f68dcb2e24de4eb7890ac358a6f2ad
license_note: full
summary: '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#'
summary_source: rss
summary_en: '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#'
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2026-45447 — openssl
---

# DEBIAN-CVE-2026-45447 — openssl

## TL;DR
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#

## Key Points
- cve / DEBIAN-CVE-2026-45447 / severity:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
**Advisory:** DEBIAN-CVE-2026-45447

**Affected (your watchlist):**
- `Debian:openssl` 3.0.11-1~deb12u2 → no fixed version listed [rpi]

**Details:**
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.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2026-45447

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2026-45447_

## Source
元記事: [DEBIAN-CVE-2026-45447 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2026-45447) — published 2026-06-09T17:17:19Z