CVE-2020-13790Public exploitNetwork attack vector

Program crash via undersized PPM rescale array

Published Jun 3, 2020 · Updated Aug 4, 2024

Heap buffer over-read in libjpeg-turbo 2.0.4 and mozjpeg 4.0.0 allows context-dependent attackers to crash programs via a malformed PPM file. In rdppm.c, get_rgb_row uses a pixel byte exceeding the header's maximum as an index into a rescale array allocated for only maxval plus one entries. The condition requires processing a binary PPM or PGM whose declared maximum is below 255 and whose pixel data exceeds that maximum; the demonstrated consequence is a process crash.

CVSS severity8.1
High
EPSS probability3.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer over-read in libjpeg-turbo 2.0.4 and mozjpeg 4.0.0 allows context-dependent attackers to crash programs via a malformed PPM file. In rdppm.c, get_rgb_row uses a pixel byte exceeding the header's maximum as an index into a rescale array allocated for only maxval plus one entries. The condition requires processing a binary PPM or PGM whose declared maximum is below 255 and whose pixel data exceeds that maximum; the demonstrated consequence is a process crash.

The record

CVE
CVE-2020-13790
Published
Jun 3, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 3, 2020CVE 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1OracleCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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.

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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-125Out-of-bounds Read

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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