CVE-2020-14409

Heap corruption via overflowing surface pitch calculation

Published Jan 19, 2021 · Updated Aug 4, 2024

Integer overflow in SDL2 2.0.12 and earlier allows context-dependent attackers to corrupt heap memory via a crafted BMP file. SDL_CalculatePitch multiplies an untrusted surface width using signed int arithmetic, allowing the pitch to wrap before SDL_CreateRGBSurfaceWithFormat allocates pixel storage. A user must cause an SDL2-based application to process the file; SDL_BlitCopy then passes the undersized pitch-derived region to SDL_memcpy, producing an out-of-bounds heap write.

CVSS severity7.8
High
EPSS probability1.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in SDL2 2.0.12 and earlier allows context-dependent attackers to corrupt heap memory via a crafted BMP file. SDL_CalculatePitch multiplies an untrusted surface width using signed int arithmetic, allowing the pitch to wrap before SDL_CreateRGBSurfaceWithFormat allocates pixel storage. A user must cause an SDL2-based application to process the file; SDL_BlitCopy then passes the undersized pitch-derived region to SDL_memcpy, producing an out-of-bounds heap write.

The record

CVE
CVE-2020-14409
Published
Jan 19, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-190, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 19, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-190Integer Overflow or Wraparound
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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