CVE-2021-3624Public exploit

Code execution via X3F dimension integer overflow

Published Apr 18, 2022 · Updated Aug 3, 2024

Integer overflow in DCRaw Project dcraw 9.28-2 allows context-dependent attackers to execute code via a crafted X3F image. In foveon_load_camf() in dcraw.c, unchecked wide and high fields read by get4() wrap the meta_length calculation, causing an undersized allocation and buffer overflow. A victim must process the file with dcraw; exploitation executes code in that user's security context, while the published reproducer demonstrates a crash.

CVSS severity7.8
High
EPSS probability0.89%
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 DCRaw Project dcraw 9.28-2 allows context-dependent attackers to execute code via a crafted X3F image. In foveon_load_camf() in dcraw.c, unchecked wide and high fields read by get4() wrap the meta_length calculation, causing an undersized allocation and buffer overflow. A victim must process the file with dcraw; exploitation executes code in that user's security context, while the published reproducer demonstrates a crash.

The record

CVE
CVE-2021-3624
Published
Apr 18, 2022
Updated
Aug 3, 2024
Vendor
DCRaw Project
Product
dcraw
Classifications
CWE-190, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=dcraw 9.28-2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

DCRaw Project · dcrawversion=dcraw 9.28-2

Published CVSS scores

9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1203Exploitation for Client Execution

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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