CVE-2005-0975: Integer signedness error in the parse_machfile function in the mach-o loader (mach_loader.c) for the Darwin Ke

Routine

LOW 2.1MITIGATEMITIGATEMITIGATE

CVE-2005-0975 is a low-severity flaw (CVSS 2.1) affecting mac os x, mac os x server, darwin kernel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer signedness error in the parse_machfile function in the mach-o loader (mach_loader.c) for the Darwin Kernel as used in Mac OS X 10.3.7, and other versions before 10.3.9, allows local users to cause a denial of service (CPU consumption) via a crafted mach-o header.

Why this priority

Public exploit reference

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

Risk facts

CVSS score	2.1 (Low)
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Published	2005-05-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: apple · opendarwin

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-05-02 04:00 UTCPublished CVE record published
2026-06-16 22:12 UTCUpdated Record last modified

apple mac os x MITIGATE

Affected: 10.3 · 10.3.1 · 10.3.2 · 10.3.3 · 10.3.4 · 10.3.5 · 10.3.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

apple mac os x server MITIGATE

Affected: 10.3 · 10.3.1 · 10.3.2 · 10.3.3 · 10.3.4 · 10.3.5 · 10.3.6 · 10.3.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.3

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

opendarwin darwin kernel MITIGATE

Affected: 7.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2005-0975?

mac os x: mitigate or apply the listed mitigation; mac os x server: mitigate or apply the listed mitigation; darwin kernel: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-0975 being exploited?

CVE-2005-0975 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-2005-0975 affect?

CVE-2005-0975 affects mac os x, mac os x server, darwin kernel. Severity is low (CVSS 2.1). Integer signedness error in the parse_machfile function in the mach-o loader (mach_loader.c) for the Darwin Kernel as used in Mac OS X 10.3.7, and other versions before 10.3.9, allows local users to cause a denial of service (CPU consumptio

How urgent is CVE-2005-0975?

Priority 23/100. Public exploit reference

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References

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