Upstream information

CVE-2026-42784 at MITRE

Description

A flaw was found in sequoia-openpgp. The library incorrectly infers key flags for older certificates when a key flags subpacket is missing, leading to a discrepancy in how key capabilities are viewed. This key flag confusion allows an attacker to bypass the back-signature check. Consequently, an attacker can illegitimately bind an arbitrary subkey to their own certificate and forge signatures, completely compromising cryptographic integrity.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (Red Hat) SUSE
Base Score 7.4 6.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction Required Required
Scope Changed Unchanged
Confidentiality Impact None None
Integrity Impact High High
Availability Impact None None
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 7.1
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction Passive
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact High
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1281373 [NEW]

No SUSE Security Announcements cross referenced.

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 rustup Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP7 rustup Not affected
SUSE Linux Enterprise Server 15 SP7 rustup Not affected
SUSE Linux Enterprise Server 16.0 rustup Not affected
SUSE Linux Enterprise Server 16.1 rustup Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 rustup Not affected
SUSE Linux Enterprise Server for SAP applications 16.0 rustup Not affected
SUSE Linux Enterprise Server for SAP applications 16.1 rustup Not affected
openSUSE Leap 16.0 rustup Not affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS rustup Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5 rustup Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS rustup Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP4 rustup Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP5 rustup Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP6 rustup Not affected
SUSE Linux Enterprise Server 15 SP4 rustup Not affected
SUSE Linux Enterprise Server 15 SP4-LTSS rustup Not affected
SUSE Linux Enterprise Server 15 SP5 rustup Not affected
SUSE Linux Enterprise Server 15 SP5-LTSS rustup Not affected
SUSE Linux Enterprise Server 15 SP6 rustup Not affected
SUSE Linux Enterprise Server 15 SP6-LTSS rustup Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 rustup Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 rustup Not affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 rustup Not affected
Products past their end of life and not receiving proactive updates anymore.
SUSE Enterprise Storage 7.1 rustup Affected
SUSE Linux Enterprise Desktop 15 SP3 rustup Affected
SUSE Linux Enterprise Desktop 15 SP4 rustup Not affected
SUSE Linux Enterprise Desktop 15 SP5 rustup Not affected
SUSE Linux Enterprise Desktop 15 SP6 rustup Not affected
SUSE Linux Enterprise High Performance Computing 15 SP3 rustup Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS rustup Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS rustup Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 rustup Not affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS rustup Not affected
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS rustup Not affected
SUSE Linux Enterprise Module for Development Tools 15 SP3 rustup Affected
SUSE Linux Enterprise Real Time 15 SP3 rustup Affected
SUSE Linux Enterprise Real Time 15 SP4 rustup Not affected
SUSE Linux Enterprise Server 15 SP3 rustup Affected
SUSE Linux Enterprise Server 15 SP3-BCL rustup Affected
SUSE Linux Enterprise Server 15 SP3-LTSS rustup Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 rustup Affected
SUSE Manager Proxy 4.2 rustup Affected
SUSE Manager Proxy 4.3 rustup Not affected
SUSE Manager Retail Branch Server 4.2 rustup Affected
SUSE Manager Retail Branch Server 4.3 rustup Not affected
SUSE Manager Server 4.2 rustup Affected
SUSE Manager Server 4.3 rustup Not affected
openSUSE Leap 15.3 rustup Affected
openSUSE Leap 15.4 rustup Not affected
openSUSE Leap 15.5 rustup Not affected
openSUSE Leap 15.6 rustup Not affected

SUSE Timeline for this CVE

CVE page created: Fri Sep 18 16:44:18 2026
CVE page last modified: Fri Sep 18 17:39:10 2026