CVE-2021-32490

Application crash via filter_bv out-of-bounds write

Published Jun 24, 2021 · Updated Aug 3, 2024

Out-of-bounds write in DJVU::filter_bv() in DjVuLibre 3.5.28 and earlier allows local users to crash applications via crafted DjVu files. The function writes beyond a bounds-checked buffer while decoding attacker-supplied DjVu data, producing memory corruption during file processing. A local user must cause an application to open the crafted file; public records confirm application crash and leave any additional consequences unspecified.

CVSS severity7.8
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds write in DJVU::filter_bv() in DjVuLibre 3.5.28 and earlier allows local users to crash applications via crafted DjVu files. The function writes beyond a bounds-checked buffer while decoding attacker-supplied DjVu data, producing memory corruption during file processing. A local user must cause an application to open the crafted file; public records confirm application crash and leave any additional consequences unspecified.

The record

CVE
CVE-2021-32490
Published
Jun 24, 2021
Updated
Aug 3, 2024
Vendor
DjVuLibre Project
Product
DjVuLibre
Classifications
CWE-119, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2021CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=djvulibre-3.5.28 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

DjVuLibre Project · DjVuLibreversion=djvulibre-3.5.28 and earlier

Published CVSS scores

6.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
7.8NVDCVSS: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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo