CVE-2010-2547

Status: ModifiedHigh (8.1)—
Use-after-free vulnerability in kbx/keybox-blob.c in GPGSM in GnuPG 2.x through 2.0.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a certificate with a large number of Subject Alternate Names, which is not properly handled in a realloc operation when importing the certificate or verifying its signature.
CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 8.1
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 5.34%
Percentile among all scored CVEs: 92
Score date: 10/9/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (3)

Debian — Debian Linux Fedoraproject — Fedora Gnupg — Gnupg
CWEs

CWE-416
References

Raw JSON (NVD)

Show
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
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  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in kbx/keybox-blob.c in GPGSM in GnuPG 2.x through 2.0.16 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a certificate with a large number of Subject Alternate Names, which is not properly handled in a realloc operation when importing the certificate or verifying its signature."
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      "value": "Vulnerabilidad de uso después de la liberación (use-after-free) en kbx/keybox-blob.c en GPGSM de GnuPG v2.x hasta v2.0.16 permite a atacantes remotos causar una denegación de servicio (caída del sistema) y posiblemente ejecutar código de su elección mediante un certificado con un gran número de Subject Alternate Names, que no es manejado de forma adecuada en una operación realloc cuando se importa el certificado o se verifica su firma."
    }
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  "lastModified": "2026-06-16T23:20:57.693",
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}