CVE-2025-64503

LOWNVD 3.33.3—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 89% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
3.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.3Exploit: Elevated riskExposed: 0

A fix is available — apply it.

cups-filters contains backends, filters, and other software required to get the cups printing service working on operating systems other than macos. In cups-filters prior to 1.28.18, by crafting a PDF file with a large MediaBox value, an attacker can cause CUPS-Filter 1.x’s pdftoraster tool to write beyond the bounds of an array. First, a PDF with a large MediaBox width value causes header.cupsWidth to become large. Next, the calculation of bytesPerLine = (header.cupsBitsPerPixel * header.cupsWidth + 7) / 8 overflows, resulting in a small value. Then, lineBuf is allocated with the small bytesPerLine size. Finally, convertLineChunked calls writePixel8, which attempts to write to lineBuf outside of its buffer size (out of bounds write). In libcupsfilters, the maintainers found the same bytesPerLine multiplication without overflow check, but the provided test case does not cause an overflow there, because the values are different. Commit 50d94ca0f2fa6177613c97c59791bde568631865 contains a patch, which is incorporated into cups-filters version 1.28.18.

CVSS v3
3.3
EG Score
3.3(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity33% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

November 12, 2025

Last Modified

June 17, 2026

References (6)

Vendor Advisories for CVE-2025-64503(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntucups-filters-core-drivers (2.0.1-0ubuntu3.25.10.1) @ questing2026-05-29ubuntu
ubuntulibcupsfilters2t64 (2.1.1-0ubuntu2.1) @ plucky2026-05-29ubuntu
redhatcups-main-2.4.17-1.hum12026-04-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(6 across 4 ecosystems)
Debian:13(2)
PackageVulnerable rangeFixed inDependents
cups-filters1.28.17-61.28.17-6+deb13u1—
libcupsfilters2.0.0-32.0.0-3+deb13u1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
cups-filters1.28.17-61.28.17-7—
libcupsfilters2.0.0-3, 2.1.1-12.1.1-2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
cups-filters1.28.7-1, 1.28.7-1+deb11u1, 1.28.7-1+deb11u2, 1.28.7-1+deb11u31.28.7-1+deb11u4—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cups-filters1.28.17-3, 1.28.17-3+deb12u11.28.17-3+deb12u2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 153 total refreshes for this CVE.

  1. 2026-09-19 15:42 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
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  6. 2026-09-13 16:46 UTCEPSS rescore
  7. 2026-09-12 18:06 UTCOSV refresh
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  24. 2026-08-24 23:44 UTCOSV refresh
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  1. 2026-08-23 00:18 UTCEPSS rescore
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  17. 2026-08-08 16:55 UTCOSV refresh
  18. 2026-08-08 16:36 UTCEPSS rescore
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  28. 2026-07-30 16:27 UTCEPSS rescore
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  37. 2026-07-23 15:41 UTCOSV refresh
  38. 2026-07-23 14:18 UTCEPSS rescore
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  40. 2026-07-23 03:01 UTCEG score recompute▼ 0.70
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  75. 2026-06-28 04:56 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2025-64503?
CVE-2025-64503 is a low vulnerability published on November 12, 2025. cups-filters contains backends, filters, and other software required to get the cups printing service working on operating systems other than macos. In cups-filters prior to 1.28.18, by crafting a PDF file with a large MediaBox value, an attacker can cause CUPS-Filter 1.x’s pdftoraster tool to…
When was CVE-2025-64503 disclosed?
CVE-2025-64503 was first published in the National Vulnerability Database on November 12, 2025, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-64503 actively exploited?
CVE-2025-64503 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.1% of all scored CVEs.
What is the CVSS score of CVE-2025-64503?
CVE-2025-64503 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2025-64503?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-64503, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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