CVE-2026-24660Public exploitNetwork attack vector

Heap corruption via X3F dimension overflow

Published Apr 7, 2026 · Updated Apr 7, 2026

Heap-based buffer overflow in LibRaw Commit d20315b allows attackers to corrupt memory by processing a crafted Sigma/Foveon X3F file. The x3f_load_huffman size calculation multiplies attacker-controlled row and column counts in 32-bit arithmetic, allocates the wrapped size, and then decodes against the original dimensions. Exploitation requires X3F support compiled with USE_X3FTOOLS and max_raw_memory_mb above about 11 GB; default builds and memory settings are not exposed.

CVSS severity8.1
High
EPSS probability0.70%
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 LibRaw Commit d20315b allows attackers to corrupt memory by processing a crafted Sigma/Foveon X3F file. The x3f_load_huffman size calculation multiplies attacker-controlled row and column counts in 32-bit arithmetic, allocates the wrapped size, and then decodes against the original dimensions. Exploitation requires X3F support compiled with USE_X3FTOOLS and max_raw_memory_mb above about 11 GB; default builds and memory settings are not exposed.

The record

CVE
CVE-2026-24660
Published
Apr 7, 2026
Updated
Apr 7, 2026
Vendor
LibRaw LLC
Product
LibRaw
Classifications
CWE-190, CWE-120, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record 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=Commit d20315b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LibRaw LLC · LibRawversion=Commit d20315b

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1UbuntuCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5Red HatCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
8.1Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
CWE-120Buffer Copy without Checking Size of Input
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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