CVE-2023-0909: A vulnerability, which was classified as problematic, was found in cxasm notepad-- 1.22

Routine

LOW 3.3DOWNGRADE

CVE-2023-0909 is a low-severity flaw (CVSS 3.3) affecting notepad--. 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 cxasm notepad-- 1.22. This affects an unknown part of the component Directory Comparison Handler. The manipulation leads to denial of service. The attack needs to be approached locally. The associated identifier of this vulnerability is VDB-221475.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	3.3 (Low)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 81%)
CISA exploited list	No
Weakness	CWE-404
Published	2023-02-18
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: notepad-- project

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

Am I affected?

Timeline

2023-02-18 09:15 UTCPublished CVE record published
2026-06-17 05:26 UTCUpdated Record last modified

notepad-- project notepad-- DOWNGRADE

Affected: 1.22

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.22

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.22 (Debian / Ubuntu)

apt-cache madison notepad-- sudo apt install notepad--=<VERSION_BEFORE_1.22> sudo apt-mark hold notepad--

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list notepad-- sudo dnf downgrade notepad---<VERSION_BEFORE_1.22> sudo dnf versionlock add notepad--

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-0909?

notepad--: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-0909 being exploited?

CVE-2023-0909 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-2023-0909 affect?

CVE-2023-0909 affects notepad--. Severity is low (CVSS 3.3). A vulnerability, which was classified as problematic, was found in cxasm notepad-- 1.22. This affects an unknown part of the component Directory Comparison Handler. The manipulation leads to denial of service. The attack needs to be approac

How urgent is CVE-2023-0909?

Priority 21/100. Public exploit reference

References

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