CVE-2025-43505: An out-of-bounds write issue was addressed with improved input validation

Q: How do I fix CVE-2025-43505?

xcode: upgrade to 26.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-43505 being exploited?

CVE-2025-43505 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-2025-43505 affect?

CVE-2025-43505 affects xcode. Severity is high (CVSS 8.8). An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Xcode 26.1. Processing a maliciously crafted file may lead to heap corruption.

Routine

HIGH 8.8UPGRADE

CVE-2025-43505 is a high-severity flaw (CVSS 8.8) affecting xcode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Xcode 26.1. Processing a maliciously crafted file may lead to heap corruption.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-787
Published	2025-11-04
Last modified	2026-10-18

Publisher (CNA): Apple Inc. · Vendor: apple

Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-04 02:15 UTCPublished CVE record published
2026-10-18 21:10 UTCUpdated Record last modified

apple xcode UPGRADE

Affected: < 26.1

Fixed in: 26.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 26.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xcode

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-2025-43505?

xcode: upgrade to 26.1. Exact commands for each OS are on this page.

Is CVE-2025-43505 being exploited?

CVE-2025-43505 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-2025-43505 affect?

CVE-2025-43505 affects xcode. Severity is high (CVSS 8.8). An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Xcode 26.1. Processing a maliciously crafted file may lead to heap corruption.

How urgent is CVE-2025-43505?

Priority 36/100. High severity

Related CVEs

CVE-2026-86948 HIGH 8.8 UPGRADE This issue was addressed by enforcing library validation on the affected binaries
CVE-2026-86874 LOW 3.3 UPGRADE An out-of-bounds read was addressed with improved input validation
CVE-2026-86875 MEDIUM 4.3 UPGRADE An input validation issue was addressed with improved input validation
CVE-2026-86949 HIGH 8.8 UPGRADE This issue was addressed by enforcing library validation on the affected binaries
CVE-2025-43504 MEDIUM 4.9 UPGRADE A buffer overflow was addressed with improved bounds checking

References

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