CVE-2025-6140: A vulnerability, which was classified as problematic, was found in spdlog up to 1.15.1

Q: How do I fix CVE-2025-6140?

spdlog: upgrade to 1.15.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-6140 being exploited?

CVE-2025-6140 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-6140 affect?

CVE-2025-6140 affects spdlog. Severity is low (CVSS 3.3). A vulnerability, which was classified as problematic, was found in spdlog up to 1.15.1. This affects the function scoped_padder in the library include/spdlog/pattern_formatter-inl.h. The manipulation leads to resource consumption. It is pos

Q: How urgent is CVE-2025-6140?

Priority 21/100. Public exploit reference

Routine

LOW 3.3UPGRADE

CVE-2025-6140 is a low-severity flaw (CVSS 3.3) affecting spdlog. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability, which was classified as problematic, was found in spdlog up to 1.15.1. This affects the function scoped_padder in the library include/spdlog/pattern_formatter-inl.h. The manipulation leads to resource consumption. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. Upgrading to version 1.15.2 is able to address this issue. The identifier of the patch is 10320184df1e

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-400, CWE-404
Published	2025-06-16
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: gabime

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-16 22:16 UTCPublished CVE record published
2026-06-17 10:01 UTCUpdated Record last modified

gabime spdlog UPGRADE

Affected: < 1.15.2

Fixed in: 1.15.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy spdlog || rpm -q spdlog || spdlog --version

2. UPGRADE to 1.15.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spdlog

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spdlog

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-6140?

spdlog: upgrade to 1.15.2. Exact commands for each OS are on this page.

Is CVE-2025-6140 being exploited?

CVE-2025-6140 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-6140 affect?

CVE-2025-6140 affects spdlog. Severity is low (CVSS 3.3). A vulnerability, which was classified as problematic, was found in spdlog up to 1.15.1. This affects the function scoped_padder in the library include/spdlog/pattern_formatter-inl.h. The manipulation leads to resource consumption. It is pos

How urgent is CVE-2025-6140?

Priority 21/100. Public exploit reference

References

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