How severe is CVE-2021-3508?

CVE-2021-3508 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-3508 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3508?

CVE-2021-3508 affects Pdfresurrect Project Pdfresurrect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3508?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3508 published?

CVE-2021-3508 was published on 2021-04-28 and last updated on 2026-06-17.

CVE-2021-3508

CVE-2021-3508 is a medium-severity vulnerability in Pdfresurrect Project Pdfresurrect with a CVSS 3.x base score of 5.5. 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-835.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Pdfresurrect Project Pdfresurrect
Published: 2021-04-28
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-3508?: 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.
How severe is CVE-2021-3508?: CVE-2021-3508 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-3508 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3508?: CVE-2021-3508 affects Pdfresurrect Project Pdfresurrect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3508?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3508 published?: CVE-2021-3508 was published on 2021-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:pdfresurrect_project:pdfresurrect:0.22b:*:*:*:*:*:*:*

More vulnerabilities in Pdfresurrect Project Pdfresurrect

CVE-2020-20740 — High (CVSS 7.8): PDFResurrect before 0.20 lack of header validation checks causes heap-buffer-overflow in pdf_get_version().
CVE-2020-9549 — High (CVSS 7.8): In PDFResurrect 0.12 through 0.19, get_type in pdf.c has an out-of-bounds write via a crafted PDF document.
CVE-2019-14934 — High (CVSS 7.8): An issue was discovered in PDFResurrect before 0.18. pdf_load_pages_kids in pdf.c doesn't validate a certain size…
CVE-2019-14267 — High (CVSS 7.8): PDFResurrect 0.15 has a buffer overflow via a crafted PDF file because data associated with startxref and %%EOF is…

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