CVE-2020-18395Public exploit

Process crash via null ellipsoid pointer write

Published May 28, 2021 · Updated Aug 4, 2024

NULL pointer dereference in GNU Gama 2.04 allows attackers to crash gama-g3 by processing crafted ellipsoid XML input. DataParser::g3_const_ellipsoid_b passes the parsed ellipsoid value to GNU_gama::set, which writes through a null Ellipsoid pointer at ellipsoid.h line 45. Processing the file with gama-g3 and the envelope algorithm terminates the process with a segmentation fault.

CVSS severity7.5
High
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in GNU Gama 2.04 allows attackers to crash gama-g3 by processing crafted ellipsoid XML input. DataParser::g3_const_ellipsoid_b passes the parsed ellipsoid value to GNU_gama::set, which writes through a null Ellipsoid pointer at ellipsoid.h line 45. Processing the file with gama-g3 and the envelope algorithm terminates the process with a segmentation fault.

The record

CVE
CVE-2020-18395
Published
May 28, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. May 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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