Cloudanix VulnDB

CVE-2025-69418

Medium · 4.0

CVSS

4.0

EPSS

0.1%

Published

Jan 27, 2026

CISA due date

—

The record

Issue summary: When using the low-level OCB API directly with AES-NI or<br>other hardware-accelerated code paths, inputs whose length is not a multiple<br>of 16 bytes can leave the final partial block unencrypted and unauthenticated.<br><br>Impact summary: The trailing 1-15 bytes of a message may be exposed in<br>cleartext on encryption and are not covered by the authentication tag,<br>allowing an attacker to read or tamper with those bytes without detection.<br><br>The low-level OCB encrypt and decrypt routines in the hardware-accelerated<br>stream path process full 16-byte blocks but do not advance the input/output<br>pointers. The subsequent tail-handling code then operates on the original<br>base pointers, effectively reprocessing the beginning of the buffer while<br>leaving the actual trailing bytes unprocessed. The authentication checksum<br>also excludes the true tail bytes.<br><br>However, typical OpenSSL consumers using EVP are not affected because the<br>higher-level EVP and provider OCB implementations split inputs so that full<br>blocks and trailing partial blocks are processed in separate calls, avoiding<br>the problematic code path. Additionally, TLS does not use OCB ciphersuites.<br>The vulnerability only affects applications that call the low-level<br>CRYPTO_ocb128_encrypt() or CRYPTO_ocb128_decrypt() functions directly with<br>non-block-aligned lengths in a single call on hardware-accelerated builds.<br>For these reasons the issue was assessed as Low severity.<br><br>The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.2, 3.1 and 3.0 are not affected<br>by this issue, as OCB mode is not a FIPS-approved algorithm.<br><br>OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0 and 1.1.1 are vulnerable to this issue.<br><br>OpenSSL 1.0.2 is not affected by this issue.

Affected packages

Ecosystem Package Introduced Fixed
AlmaLinux:10 openssl 0 1:3.5.1-7.el10_1.alma.1
AlmaLinux:10 openssl-devel 0 1:3.5.1-7.el10_1.alma.1
AlmaLinux:10 openssl-libs 0 1:3.5.1-7.el10_1.alma.1
AlmaLinux:10 openssl-perl 0 1:3.5.1-7.el10_1.alma.1
Chainguard libcrypto3-2.34 0 3.6.1-r0
Chainguard openssl 0 3.6.1-r0
Chainguard openssl-provider-fips 0 0
Chainguard openssl-provider-fips-3.1.2 0 0
Chainguard openssl-provider-fips-3.1.2 0 3.1.2-r5
Chainguard openssl-provider-fips-3.4.0 0 0
Chainguard openssl-provider-fips-3.4.0 0 3.4.0-r4
Chainguard openssl-provider-fips-3.6.0 0 0
Chainguard openssl-provider-fips-3.6.0 0 3.6.0-r2
Mageia:9 openssl 0 3.0.19-1.mga9
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS openssl-3 0 3.0.8-150500.5.57.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS openssl-3 0 3.0.8-150500.5.57.1
SUSE:Linux Enterprise Micro 5.3 openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise Micro 5.4 openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7 openssl-3 0 3.2.3-150700.5.24.1
SUSE:Linux Enterprise Server 15 SP4-LTSS openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise Server 15 SP5-LTSS openssl-3 0 3.0.8-150500.5.57.1
SUSE:Linux Enterprise Server 15 SP6-LTSS openssl-1_1 0 1.1.1w-150600.5.21.1
SUSE:Linux Enterprise Server 15 SP6-LTSS openssl-3 0 3.1.4-150600.5.42.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP4 openssl-3 0 3.0.8-150400.4.78.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP5 openssl-3 0 3.0.8-150500.5.57.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP6 openssl-1_1 0 1.1.1w-150600.5.21.1
SUSE:Linux Enterprise Server for SAP Applications 15 SP6 openssl-3 0 3.1.4-150600.5.42.1
Wolfi openssl 0 3.6.1-r0
openSUSE:Leap 15.6 openssl-1_1 0 1.1.1w-150600.5.21.1
openSUSE:Leap 15.6 openssl-3 0 3.1.4-150600.5.42.1
openSUSE:Leap 16.0 openssl-3 0 3.5.0-160000.5.1
openSUSE:Tumbleweed openssl-3 0 3.5.3-2.1

Related vulnerabilities