CVE-2020-15503

Status: ModifiedHigh (7.5)—
LibRaw before 0.20-RC1 lacks a thumbnail size range check. This affects decoders/unpack_thumb.cpp, postprocessing/mem_image.cpp, and utils/thumb_utils.cpp. For example, malloc(sizeof(libraw_processed_image_t)+T.tlength) occurs without validating T.tlength.
CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base score: 7.5
Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 3.67%
Percentile among all scored CVEs: 89
Score date: 10/15/2026
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 Libraw — Libraw
CWEs

CWE-20
References

Raw JSON (NVD)

Show
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  "id": "CVE-2020-15503",
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  "published": "2020-07-02T14:15:11.683",
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          "value": "CWE-20"
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      "lang": "en",
      "value": "LibRaw before 0.20-RC1 lacks a thumbnail size range check. This affects decoders/unpack_thumb.cpp, postprocessing/mem_image.cpp, and utils/thumb_utils.cpp. For example, malloc(sizeof(libraw_processed_image_t)+T.tlength) occurs without validating T.tlength."
    },
    {
      "lang": "es",
      "value": "LibRaw versiones anteriores a 0.20-RC1, carece de una comprobación de rango de tamaño de miniaturas. Esto afecta a los archivos decoders/unpack_thumb.cpp, postprocessing/mem_image.cpp, y utils/thumb_utils.cpp. Por ejemplo, malloc(sizeof(libraw_processed_image_t)+T.tlength) ocurre sin comprobar T.tlength"
    }
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  "lastModified": "2026-06-17T02:56:45.237",
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