CVE-2026-41051

csync2 uses insecure temporary directories when compiled with C99 or later

5.1 MediumFix available

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.07%Up 0.1 points since May 13, 2026

What each source reports

CVE List Score used 5.1

csync2 uses insecure temporary directories when compiled with C99 or later

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: CVE-2026-41051
CVSS 4.0: 5.1 MediumCVSS: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 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-367
Updated: 2026-11-02

EUVDEUVD-2026-29920 5.1

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: EUVD-2026-29920
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-7mqw-hr29-pj76 5.1

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU...

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: GHSA-7mqw-hr29-pj76
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-367
Updated: 2026-11-02

NVD 5.1

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: CVE-2026-41051
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-367
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-41051 5.1

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: DEBIAN-CVE-2026-41051
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-41051 5.1

csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.

Record: UBUNTU-CVE-2026-41051
CVSS 4.0: 5.1 MediumCVSS: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 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

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OSVopenSUSE-SU-2026:10600-1 No score

csync2-2.0+git.1600444747.83b3644-3.1 on GA media

These are all security issues fixed in the csync2-2.0+git.1600444747.83b3644-3.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:10600-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:20900-1 No score

Security update for csync2

This update for csync2 fixes the following issues

Security issue:

CVE-2026-41051: uses insecure temporary directories when compiled with C99 or later (bsc#1262472).

Non security issue:

Fix packages for Immutable Mode (jsc#PED-14855).

Record: openSUSE-SU-2026:20900-1
Updated: 2026-11-02

OSVSUSE-SU-2026:2116-1 No score

Security update for csync2

This update for csync2 fixes the following issue

CVE-2026-41051: uses insecure temporary directories when compiled with C99 or later (bsc#1262472).

Record: SUSE-SU-2026:2116-1
Updated: 2026-11-02

OSVSUSE-SU-2026:21994-1 No score

Security update for csync2

This update for csync2 fixes the following issues

Security issue:

CVE-2026-41051: uses insecure temporary directories when compiled with C99 or later (bsc#1262472).

Non security issue:

Fix packages for Immutable Mode (jsc#PED-14855).

Record: SUSE-SU-2026:21994-1
Updated: 2026-11-02

OSVSUSE-SU-2026:22041-1 No score

Security update for csync2

This update for csync2 fixes the following issues

Security issue:

CVE-2026-41051: uses insecure temporary directories when compiled with C99 or later (bsc#1262472).

Non security issue:

Fix packages for Immutable Mode (jsc#PED-14855).

Record: SUSE-SU-2026:22041-1
Updated: 2026-11-02

Affected products

suse opensuse tumbleweed

Affected packages

Affected packages
Package	Affected	Fixed
`csync2` Debian:12	All versions, plus listed versions 2.0-42-g83b3644-22.0-42-g83b3644-32.0-42-g83b3644-42.0-42-g83b3644-52.0-42-g83b3644-62.0-42-g83b3644-7	None known
`csync2` Debian:13	All versions, plus listed versions 2.0-42-g83b3644-32.0-42-g83b3644-42.0-42-g83b3644-52.0-42-g83b3644-62.0-42-g83b3644-7	None known
`csync2` Debian:14	before 2.0-42-g83b3644-6, plus listed versions 2.0-42-g83b3644-32.0-42-g83b3644-42.0-42-g83b3644-5	2.0-42-g83b3644-6
`csync2` SUSE:Linux Enterprise High Availability Extension 16.0	before 2.0+git.1600444747.83b3644-160000.3.1	2.0+git.1600444747.83b3644-160000.3.1
`csync2` SUSE:Linux Enterprise Server for SAP applications 16.0	before 2.0+git.1600444747.83b3644-160000.3.1	2.0+git.1600444747.83b3644-160000.3.1
`csync2` Ubuntu:16.04:LTS	All versions, plus listed versions 2.0+73d3293-22.0+73d3293-2build12.0+73d3293-2build2	None known
`csync2` Ubuntu:18.04:LTS	All versions, plus listed versions 2.0-8-g175a01c-4ubuntu1	None known
`csync2` Ubuntu:20.04:LTS	All versions, plus listed versions 2.0-8-g175a01c-4ubuntu22.0-22-gce67c55-1ubuntu1	None known
`csync2` Ubuntu:22.04:LTS	All versions, plus listed versions 2.0-25-gc0faaf9-1	None known
`csync2` Ubuntu:24.04:LTS	All versions, plus listed versions 2.0-42-g83b3644-22.0-42-g83b3644-2build12.0-42-g83b3644-2build22.0-42-g83b3644-2build3	None known

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Affected packages
Package	Affected	Fixed
`csync2` Ubuntu:25.10	All versions, plus listed versions 2.0-42-g83b3644-2build32.0-42-g83b3644-3	None known
`csync2` Ubuntu:26.10	All versions, plus listed versions 2.0-42-g83b3644-42.0-42-g83b3644-6	None known
`csync2` Ubuntu:26.04:LTS	All versions, plus listed versions 2.0-42-g83b3644-32.0-42-g83b3644-3build12.0-42-g83b3644-4	None known
`csync2` openSUSE:Tumbleweed	before 2.0+git.1600444747.83b3644-3.1	2.0+git.1600444747.83b3644-3.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-41051 is a medium vulnerability (CVSS 5.1) in Suse Opensuse Tumbleweed, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.07%, the 0th percentile. Fixed in csync2 2.0-42-g83b3644-6.

References

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