CVE-2026-41051

Service interruption via failed secure-mkstemp detection

Published May 13, 2026 · Updated May 13, 2026

csync2 on openSUSE Tumbleweed before 2.0+git.1600444747.83b3644-3.1 allows local users to interrupt service through a temporary-directory race. The configure.ac secure-mkstemp probe declares main without an explicit return type, so C99-or-later builds reject the probe and omit HAVE_SECURE_MKSTEMP, selecting unsafe temporary-directory handling. Exploitation requires low-privileged local access and interaction with a victim csync2 run; the published impact is availability only.

CVSS severity5.1
Medium
EPSS probability0.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

csync2 on openSUSE Tumbleweed before 2.0+git.1600444747.83b3644-3.1 allows local users to interrupt service through a temporary-directory race. The configure.ac secure-mkstemp probe declares main without an explicit return type, so C99-or-later builds reject the probe and omit HAVE_SECURE_MKSTEMP, selecting unsafe temporary-directory handling. Exploitation requires low-privileged local access and interaction with a victim csync2 run; the published impact is availability only.

The record

CVE
CVE-2026-41051
Published
May 13, 2026
Updated
May 13, 2026
Vendor
OpenSUSE
Product
openSUSE Tumbleweed
Classifications
CWE-367, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=? <2.0+git.1600444747.83b3644-3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenSUSE · openSUSE Tumbleweedversion=? <2.0+git.1600444747.83b3644-3.1

Published CVSS scores

5.0SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
5.1SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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