--- schema_version: '1.0' id: security-20260705-f8b6b2 url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-69418 url_hash: f8b6b2ef21291f7de1c93b0b789cae3e17dc4c136a7ca69d84bc25e99316a967 canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2025-69418 source: osv:debian category: security/os category_raw: cve/os region: null tags: - cve - DEBIAN-CVE-2025-69418 - severity:CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N - openssl - Debian lang: en published_at: '2026-01-27T16:16:33Z' fetched_at: '2026-07-05T15:34:34Z' updated_at: '2026-07-05T15:35:57Z' status: published content_hash: 107dbd77d47ab6e21f0bf1846a4265988eb99b76d811d71336e178b9efaa3dd5 license_note: full summary: 'Issue summary: When using the low-level OCB API directly with AES-NI or
other hardware-accelerated code paths, inputs whose length is not a multiple
of 16 bytes can leave the final partial block unencrypted and unauthenticated.

Impact summary: The trailing 1-15 bytes' summary_source: rss summary_en: 'Issue summary: When using the low-level OCB API directly with AES-NI or
other hardware-accelerated code paths, inputs whose length is not a multiple
of 16 bytes can leave the final partial block unencrypted and unauthenticated.

Impact summary: The trailing 1-15 bytes' entities: [] key_facts: [] related: [] related_auto: [] title: DEBIAN-CVE-2025-69418 — openssl --- # DEBIAN-CVE-2025-69418 — openssl ## TL;DR Issue summary: When using the low-level OCB API directly with AES-NI or
other hardware-accelerated code paths, inputs whose length is not a multiple
of 16 bytes can leave the final partial block unencrypted and unauthenticated.

Impact summary: The trailing 1-15 bytes ## Key Points - cve / DEBIAN-CVE-2025-69418 / severity:CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N / openssl / Debian ## Details **Severity:** CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N **Advisory:** DEBIAN-CVE-2025-69418 **Affected (your watchlist):** - `Debian:openssl` 3.0.11-1~deb12u2 → no fixed version listed [rpi] **Details:** Issue summary: When using the low-level OCB API directly with AES-NI or
other hardware-accelerated code paths, inputs whose length is not a multiple
of 16 bytes can leave the final partial block unencrypted and unauthenticated.

Impact summary: The trailing 1-15 bytes of a message may be exposed in
cleartext on encryption and are not covered by the authentication tag,
allowing an attacker to read or tamper with those bytes without detection.

The low-level OCB encrypt and decrypt routines in the hardware-accelerated
stream path process full 16-byte blocks but do not advance the input/output
pointers. The subsequent tail-handling code then operates on the original
base pointers, effectively reprocessing the beginning of the buffer while
leaving the actual trailing bytes unprocessed. The authentication checksum
also excludes the true tail bytes.

However, typical OpenSSL consumers using EVP are not affected because the
higher-level EVP and provider OCB implementations split inputs so that full
blocks and trailing partial blocks are processed in separate calls, avoiding
the problematic code path. Additionally, TLS does not use OCB ciphersuites.
The vulnerability only affects applications that call the low-level
CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly with
non-block-aligned lengths in a single call on hardware-accelerated builds.
For these reasons the issue was assessed as Low severity.

The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected
by this issue, as OCB mode is not a FIPS-approved algorithm.

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. **References:** - https://security-tracker.debian.org/tracker/CVE-2025-69418 _Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2025-69418_ ## Source 元記事: [DEBIAN-CVE-2025-69418 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2025-69418) — published 2026-01-27T16:16:33Z