CVE-2019-18804

CVE-2019-18804 is a high-severity vulnerability in Djvulibre Project Djvulibre with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 5.0
• EPSS exploit prediction: 4% (88th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-476
• Affected product: Djvulibre Project Djvulibre
• Published: 2019-11-07
• Last modified: 2026-06-17

Description

DjVuLibre 3.5.27 has a NULL pointer dereference in the function DJVU::filter_fv at IW44EncodeCodec.cpp.

Frequently asked questions

What is CVE-2019-18804?

DjVuLibre 3.5.27 has a NULL pointer dereference in the function DJVU::filter_fv at IW44EncodeCodec.cpp.

How severe is CVE-2019-18804?

CVE-2019-18804 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-18804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18804?

CVE-2019-18804 primarily affects Djvulibre Project Djvulibre. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18804?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-18804 published?

CVE-2019-18804 was published on 2019-11-07 and last updated on 2026-06-17.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00068.html
• http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00069.html
• https://github.com/TeamSeri0us/pocs/blob/master/djvulibre/DJVU__filter_fv%40IW44EncodeCodec.cpp_499-43___SEGV_UNKNOW.md
• https://lists.debian.org/debian-lts-announce/2019/11/msg00004.html
• https://lists.debian.org/debian-lts-announce/2021/05/msg00022.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JO65AWU7LEWNF6DDCZPRFTR2ZPP5XK6L/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYPWP5T7TSUNZV4UEIRRCTVWO6VBZWJV/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QUEME45HVGTMDOYODAZYQOGWSZ2CEFWZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SWT7E7BMWV5T33AMU6OGDPPTPIGCFFZF/
• https://sourceforge.net/p/djvu/bugs/309/
• https://usn.ubuntu.com/4198-1/
• https://www.debian.org/security/2021/dsa-5032

Affected products (13)

• cpe:2.3:a:djvulibre_project:djvulibre:3.5.27:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
• cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

More vulnerabilities in Djvulibre Project Djvulibre

• CVE-2012-6535 — Critical (CVSS 9.3): DjVuLibre before 3.5.25.3, as used in Evince, Sumatra PDF Reader, VuDroid, and other products, allows remote attackers…
• CVE-2021-3500 — High (CVSS 7.8): A flaw was found in djvulibre-3.5.28 and earlier. A Stack overflow in function DJVU::DjVuDocument::get_djvu_file() via…
• CVE-2021-32493 — High (CVSS 7.8): A flaw was found in djvulibre-3.5.28 and earlier. A heap buffer overflow in function DJVU::GBitmap::decode() via…
• CVE-2021-32492 — High (CVSS 7.8): A flaw was found in djvulibre-3.5.28 and earlier. An out of bounds read in function DJVU::DataPool::has_data() via…
• CVE-2021-32491 — High (CVSS 7.8): A flaw was found in djvulibre-3.5.28 and earlier. An integer overflow in function render() in tools/ddjvu via crafted…
• CVE-2021-32490 — High (CVSS 7.8): A flaw was found in djvulibre-3.5.28 and earlier. An out of bounds write in function DJVU::filter_bv() via crafted djvu…

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