CVE-2026-81881: radareorg radare2 · Out-of-bounds Read
Affects radareorg radare2Source CVE Database V5
Not known to be exploited · CVSS 3.3 Low : upgrade to 6.2.0 when convenient.
Data as of 5 Nov 2026, 00:01 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.2.0
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 22 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade radare2 and radareorg/radare2 to 6.2.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| radareorgradare2 | Affected
| Fixed in
|
GitHubradareorg/radare2pkg:github/radareorg/radare2Other threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade radare2 to version 6.2.0 or later, where this vulnerability is fixed. No other mitigation is required as the issue is resolved by the official patch.
Description
CVE-2026-81881 is an out-of-bounds read vulnerability in radare2's Mach-O Swift field-metadata parser prior to version 6.2.0. The flaw occurs when a relative Swift field pointer is lower than the field-metadata section base, causing a negative logical index and reading memory before the allocated buffer. This can lead to incorrect metadata processing or process termination, but no memory disclosure has been demonstrated. The issue is fixed in radare2 version 6.2.0.
References
- github.com/radareorg/radare2/security/advisories/GHSA-q4w7-225g-64j9 (opens in a new tab)
- github.com/radareorg/radare2/issues/26229 (opens in a new tab)
- github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74 (opens in a new tab)
- github.com/radareorg/radare2/releases/tag/6.2.0 (opens in a new tab)