---
schema_version: '1.0'
id: security-20260705-62db13
url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-45446
url_hash: 62db132f7f5d399ca70ade90ab2ed040bf6a9503edeb3de20def5b64105b14af
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-45446
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2026-45446
- severity:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- 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: 8e451b3a1c893b1f5b6cdff271115eca84f4a168a8b13ff5d44d9f0f6e81bc20
license_note: full
summary: 'Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV
  (RFC 8452) mishandle the authentication of AAD (Additional Authenticated Data) with
  an empty ciphertext allowing a forgery of such messages.  Impact summary: An attacker
  can forge empty messages with arbitra'
summary_source: rss
summary_en: 'Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV
  (RFC 8452) mishandle the authentication of AAD (Additional Authenticated Data) with
  an empty ciphertext allowing a forgery of such messages.  Impact summary: An attacker
  can forge empty messages with arbitra'
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2026-45446 — openssl
---

# DEBIAN-CVE-2026-45446 — openssl

## TL;DR
Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) mishandle the authentication of AAD (Additional Authenticated Data) with an empty ciphertext allowing a forgery of such messages.  Impact summary: An attacker can forge empty messages with arbitra

## Key Points
- cve / DEBIAN-CVE-2026-45446 / severity:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
**Advisory:** DEBIAN-CVE-2026-45446

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

**Details:**
Issue summary: The implementations of AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) mishandle the authentication of AAD (Additional Authenticated Data) with an empty ciphertext allowing a forgery of such messages.  Impact summary: An attacker can forge empty messages with arbitrary AAD to the victim's application using these ciphers.  AES-SIV (RFC 5297) and AES-GCM-SIV (RFC 8452) are nonce-misuse-resistant AEAD modes: they accept a key, nonce, optional AAD (bytes that are authenticated but not encrypted), and plaintext, and produces ciphertext plus a 16-byte tag. On decrypt, `EVP_DecryptFinal_ex()` is documented to return success only if the tag is verified succesfully.  In OpenSSL's provider implementation of these ciphers, the expected tag is computed only when decryption function is invoked with non-empty data. If the caller supplies AAD and then calls `EVP_DecryptFinal_ex()` without invocation of the ciphertext update, which can happen when the received ciphertext length is zero, the tag is never recalculated and still holds its all-zeros value.  When AES-GCM-SIV is used, an attacker who sends arbitrary AAD, empty ciphertext, and all-zeros tag passes authentication under any key they do not know, single-shot. When AES-SIV is used, for mounting the attack it's necessary for the application to reuse the decryption context without resetting the key.  AES-SIV is implemented since OpenSSL 3.0. AES-GCM-SIV is implemented since OpenSSL 3.2.  No protocols implemented in OpenSSL itself (TLS/CMS/PKCS7/HPKE/QUIC) support either AES-GCM-SIV or AES-SIV. To mount an attack, the applications must implement their own protocol and use the EVP interface. Also they must skip the ciphertext update when a message with an empty ciphertext arrives.  The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as these algorithms are not FIPS approved and the affected code is outside the OpenSSL FIPS module boundary.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2026-45446

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2026-45446_

## Source
元記事: [DEBIAN-CVE-2026-45446 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2026-45446) — published 2026-06-09T17:17:19Z