CVE-2026-81881: radare2 is a UNIX-like reverse engineering framework and command-line toolset

Q: How do I fix CVE-2026-81881?

radare2: upgrade to 6.2.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-81881 being exploited?

CVE-2026-81881 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-2026-81881 affect?

CVE-2026-81881 affects radare2. Severity is low (CVSS 3.3). radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift field-metadata parser was vulnerable because a relative Swift field pointer could be lower than the field-metadata section

Q: How urgent is CVE-2026-81881?

Priority 18/100. Public exploit reference

Routine

LOW 3.3UPGRADE

CVE-2026-81881 is a low-severity flaw (CVSS 3.3) affecting radare2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift field-metadata parser was vulnerable because a relative Swift field pointer could be lower than the field-metadata section base, making subtraction produce a negative logical index. The vulnerability is triggered by parsing Swift type and class metadata from a crafted Mach-O file. The derived index was used to read four bytes imme

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	None
User interaction	Required
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-125, CWE-191
Published	2026-09-22
Last modified	2026-09-25

Publisher (CNA): GitHub, Inc. · Vendor: radare

Last updated 2026-09-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-22 16:18 UTCPublished CVE record published
2026-09-25 16:49 UTCUpdated Record last modified

radare radare2 UPGRADE

Affected: < 6.2.0

Fixed in: 6.2.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy radare2 || rpm -q radare2 || radare2 --version

2. UPGRADE to 6.2.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade radare2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade radare2

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-2026-81881?

radare2: upgrade to 6.2.0. Exact commands for each OS are on this page.

Is CVE-2026-81881 being exploited?

CVE-2026-81881 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-2026-81881 affect?

CVE-2026-81881 affects radare2. Severity is low (CVSS 3.3). radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's Mach-O Swift field-metadata parser was vulnerable because a relative Swift field pointer could be lower than the field-metadata section

How urgent is CVE-2026-81881?

Priority 18/100. Public exploit reference

Software pages

Swift vulnerabilities

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References

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