CVE-2021-3508

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in...

5.5 MediumFix available

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.69%Up 0.1 points since Apr 29, 2021

What each source reports

NVD Score used 5.5

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: CVE-2021-3508
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-835
Updated: 2026-11-02

CVE List No score

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: CVE-2021-3508
Weakness: CWE-835
Updated: 2026-11-02

EUVDEUVD-2021-26827 No score

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: EUVD-2021-26827
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wx33-xp59-j4ch 5.5

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in...

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: GHSA-wx33-xp59-j4ch
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-835
Updated: 2026-11-02

OSV 5.5

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: CVE-2021-3508
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-3508 5.5

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: DEBIAN-CVE-2021-3508
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-3508 5.5

A flaw was found in PDFResurrect in version 0.22b. There is an infinite loop in get_xref_linear_skipped() in pdf.c via a crafted PDF file.

Record: UBUNTU-CVE-2021-3508
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUSN-5282-1 No score

pdfresurrect vulnerabilities

It was discovered that PDFResurrect was incorrectly handling corrupted PDF files. An attacker could possibly use this issue to cause a buffer overflow, resulting in a denial of service, or arbitrary code execution. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2019-14267)

It was discovered that PDFResurrect incorrectly handled memory when loading PDF pages. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in a denial of service, or arbitrary code execution. This issue only affected Ubuntu 16.04 ESM and Ubuntu 18.04 ESM. (CVE-2019-14934)

It was discovered that PDFResurrect was incorrectly validating header data in input PDF files. An attacker could possibly use this issue to cause a heap buffer overflow, resulting in a denial of service, or arbitrary code execution. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-20740)

Carter Yagemann discovered that PDFResurrect incorrectly handled certain memory operations during PDF summary generation. An attacker could use this to cause out-of-bounds writes, resulting in a denial of service (system crash) or arbitrary code execution. This issue only affected Ubuntu 18.04 ESM and Ubuntu 20.04 ESM. (CVE-2020-9549)

It was discovered that PDFResurrect was incorrectly processing data when performing trailer search operations. An attacker could possibly use this issue to cause an infinite loop, resulting in a denial of service. (CVE-2021-3508)

Record: USN-5282-1
Updated: 2026-11-02

Affected products

pdfresurrect project pdfresurrect

Affected packages

Affected packages
Package	Affected	Fixed
`pdfresurrect` Debian:12	before 0.22-3	0.22-3
`pdfresurrect` Debian:13	before 0.22-3	0.22-3
`pdfresurrect` Debian:14	before 0.22-3	0.22-3
`pdfresurrect` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 0.12-10.12-20.12-40.12-4ubuntu0.1~esm1	None known
`pdfresurrect` Ubuntu:Pro:16.04:LTS	before 0.12-6ubuntu0.2+esm1, plus listed versions 0.12-50.12-60.12-6ubuntu0.10.12-6ubuntu0.2	0.12-6ubuntu0.2+esm1
`pdfresurrect` Ubuntu:Pro:18.04:LTS	before 0.14-1ubuntu0.1~esm1, plus listed versions 0.12-60.14-1	0.14-1ubuntu0.1~esm1
`pdfresurrect` Ubuntu:Pro:20.04:LTS	before 0.19-1ubuntu0.1~esm1, plus listed versions 0.18-20.19-1	0.19-1ubuntu0.1~esm1
`pdfresurrect` Ubuntu:Pro:22.04:LTS	before 0.22-2ubuntu0.1~esm1, plus listed versions 0.22-10.22-2	0.22-2ubuntu0.1~esm1
`pdfresurrect` Ubuntu:24.04:LTS	All versions, plus listed versions 0.23-2	None known
`pdfresurrect` Ubuntu:25.10	All versions, plus listed versions 0.23-2	None known

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Affected packages
Package	Affected	Fixed
`pdfresurrect` Ubuntu:26.10	All versions, plus listed versions 0.23-2build1	None known
`pdfresurrect` Ubuntu:26.04:LTS	All versions, plus listed versions 0.23-20.23-2build1	None known
`pdfresurrect` Ubuntu:Pro:16.04:LTS From an advisory covering 5 CVEs	before 0.12-6ubuntu0.2+esm1, plus listed versions 0.12-50.12-60.12-6ubuntu0.10.12-6ubuntu0.2	0.12-6ubuntu0.2+esm1
`pdfresurrect` Ubuntu:Pro:18.04:LTS From an advisory covering 5 CVEs	before 0.14-1ubuntu0.1~esm1, plus listed versions 0.12-60.14-1	0.14-1ubuntu0.1~esm1
`pdfresurrect` Ubuntu:Pro:20.04:LTS From an advisory covering 5 CVEs	before 0.19-1ubuntu0.1~esm1, plus listed versions 0.18-20.19-1	0.19-1ubuntu0.1~esm1
`pdfresurrect` Ubuntu:Pro:22.04:LTS From an advisory covering 5 CVEs	before 0.22-2ubuntu0.1~esm1, plus listed versions 0.22-10.22-2	0.22-2ubuntu0.1~esm1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3508 is a medium vulnerability (CVSS 5.5) in Pdfresurrect Project Pdfresurrect, published April 28, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.69%, the 53rd percentile. Fixed in pdfresurrect 0.22-3.

References

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