CVE Database›Document archive›CVE-2025-68160

CVE-2025-68160

openssl: OpenSSL: Denial of Service due to out-of-bounds write in BIO filter

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Severity

Low

Red Hat Product Security

4.7

CVSS 3.1

Review impact separately from score.

Published · January 27, 2026

Updated · October 15, 2026

Description

A flaw was found in OpenSSL. This vulnerability involves an out-of-bounds write in the line-buffering BIO filter, which can lead to memory corruption. While exploitation is unlikely to be under direct attacker control, a successful attack could cause an application to crash, resulting in a Denial of Service (DoS).

Statement

This vulnerability is rated Low for Red Hat. The BIO_f_linebuffer filter, where this heap out-of-bounds write occurs, is not used by default in TLS/SSL data paths within Red Hat products. Exploitation requires third-party applications to explicitly use this filter with a BIO chain that can short-write and process large, newline-free data influenced by an attacker, which is an unlikely scenario under attacker control. Red Hat FIPS modules are not affected by this issue.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-787 · Out-of-bounds Write