CVE-2021-45943

Application crash via narrowed PCIDSK segment size

Published Dec 31, 2021 · Updated Aug 4, 2024

Heap-based buffer overflow in GDAL 3.3.0 through 3.4.0 allows local users to crash an application by opening a crafted PCIDSK file. CPCIDSKBinarySegment::Load casts a 64-bit segment size to int before subtracting the header, allocates a too-small buffer, then reads the full declared payload. Exploitation requires an application to open the crafted file; published scoring bounds the demonstrated consequence to an application crash.

CVSS severity5.5
Medium
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in GDAL 3.3.0 through 3.4.0 allows local users to crash an application by opening a crafted PCIDSK file. CPCIDSKBinarySegment::Load casts a 64-bit segment size to int before subtracting the header, allocates a too-small buffer, then reads the full declared payload. Exploitation requires an application to open the crafted file; published scoring bounds the demonstrated consequence to an application crash.

The record

CVE
CVE-2021-45943
Published
Dec 31, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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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