CVE-2026-81881

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Source
https://cve.org/CVERecord?id=CVE-2026-81881
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81881.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-81881
Aliases
  • GHSA-q4w7-225g-64j9
Downstream
Published
2026-09-22T15:05:21Z
Modified
2026-09-24T08:26:12Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L CVSS Calculator
Summary
radare2: Heap out-of-bounds read in radare2 Mach-O Swift metadata parser
Details

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 immediately before the allocated field-metadata buffer. This can cause incorrect metadata processing or process termination; no attacker-observable memory disclosure has been demonstrated. This issue is fixed in version 6.2.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-125",
        "CWE-191"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81881.json"
}
References

Affected packages

Git / github.com/radareorg/radare2

Affected ranges

Type
GIT
Repo
https://github.com/radareorg/radare2
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1da6e782df220edf56138ef5fe4f33745b04db74
Fixed
e1fc278734ad62f933fc6f91edb29e4ba732f402
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "6.2.0"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.10.0
0.10.1
0.10.2
0.10.3
0.10.4
0.10.4-termux4
0.10.5
0.10.6
0.8.6
0.8.8
0.9
0.9.2
0.9.4
0.9.6
0.9.7
0.9.8
0.9.8-rc1
0.9.8-rc2
0.9.8-rc3
0.9.8-rc4
0.9.9
1.*
1.0
1.0.0
1.0.1
1.0.2
1.1.0
1.2.0
1.2.0-git
1.3.0
1.3.0-git
1.4.0
1.5.0
1.6.0
2.*
2.0.0
2.0.1
2.1.0
2.2.0
2.4.0
2.5.0
2.6.0
2.6.9
2.7.0
2.8.0
2.9.0
3.*
3.0.0
3.0.1
3.1.0
3.1.1
3.1.2
3.1.3
3.2.0
3.2.1
3.3.0
3.4.0
3.4.1
3.5.0
3.5.1
3.6.0
3.7.0
3.7.1
3.8.0
3.9.0
4.*
4.0.0
4.1.0
4.1.1
4.2.0
4.2.1
4.3.0
4.3.1
4.4.0
4.5.1
5.*
5.0.0
5.1.0
5.1.1
5.2.0
5.2.1
5.3.0
5.3.1
5.4.0
5.4.0-git
5.4.2
5.5.0
5.5.2
5.5.4
5.6.0
5.6.2
5.6.4
5.6.6
5.6.8
5.7.0
5.7.2
5.7.4
5.7.6
5.7.8
5.8.0
5.8.2
5.8.4
5.8.6
5.8.8
5.9.0
5.9.2
5.9.4
5.9.6
5.9.8
6.*
6.0.0
6.0.2
6.0.4
6.0.6
6.0.7
6.0.8
6.1.0
6.1.2
6.1.4
6.1.6
6.1.8
Other
Continuous-Windows
continuous
radare2-windows-nightly
termux
wip
release-5.*
release-5.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81881.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "332677270819805383238193717200758279722",
                "295128320059232029929765671829528930204",
                "184627523897319213727199517768688153924",
                "169645158764307019081923382253024254048",
                "73651439494692449067289871383244913788",
                "57332217162829732858398458614447378309",
                "335170221235200083409868854908971301019",
                "194381366707013214646361641159617890892",
                "147272364741087878613388785379098248681",
                "51543663916266712562871821597360225593",
                "146577897530153001026446731945740797379",
                "82623966241928258742206153851855266556",
                "126160771918325133782748840760612042225",
                "303529503061528898905207045138037476960"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-81881-0389bd40",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74",
        "target":  {
            "file":  "libr/bin/format/objc/mach0_classes.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "274122758918572350299791781341132122314",
            "length":  4363
        },
        "id":  "CVE-2026-81881-22a5fd39",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/radareorg/radare2/commit/1da6e782df220edf56138ef5fe4f33745b04db74",
        "target":  {
            "file":  "libr/bin/format/objc/mach0_classes.c",
            "function":  "parse_type"
        }
    }
]
vanir_signatures_modified 
"2026-09-24T08:26:12Z"