CVE-2025-11266

MEDIUMNVD 6.66.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 6.6 from GitHub Security Advisory published 2025-12-12. NVD baseline CVSS 6.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2025-203169 (ENISA EUVD) · GHSA-7qcj-ww2g-7w6j (GitHub Security Advisories)Source: ENISA EUVD

6.6EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)) states them: "The maintainer of the software recommends users update Grassroots DICOM (GDCM) to v3.2.2 or later https://github.com/malaterre/GDCM/releases/tag/v3.2.2 from the main GitHub repository."

An out-of-bounds write vulnerability exists in the Grassroots DICOM library (GDCM). The issue is triggered during parsing of a malformed DICOM file containing encapsulated PixelData fragments (compressed image data stored as multiple fragments). This vulnerability leads to a segmentation fault caused by an out-of-bounds memory access due to unsigned integer underflow in buffer indexing. It is exploitable via file input, simply opening a crafted malicious DICOM file is sufficient to trigger the crash, resulting in a denial-of-service condition.

CVSS v3
6.6
EG Score
6.6MEDIUMmedium confidence
EG Risk
30
EG Risk 30/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity66% × 45%
Impact severity (EG Severity): CVSS 6.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.6): severity, escalated by confirmed exploitation. This CVE's 6.6 is its impact severity (EG Severity), not escalated.

EG Severity
6.6 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 12, 2025

Last Modified

October 7, 2026

Advisory Details (4)

Auto-updated Aug 8, 2026
Patch available. Sources: github_release, cisa, github_commit.
GitHub commit

commit 5829c95c8ac3 (malaterre/GDCM)

Fix landed in malaterre/GDCM commit 5829c95c8ac3 — awaiting tagged release

https://github.com/malaterre/GDCM/commit/5829c95c8ac3afa9a3a3413675e948959c28a789
GitHub release Patch Available

v3.2.2

Patch available: malaterre/GDCM v3.2.2

https://github.com/malaterre/GDCM/releases/tag/v3.2.2
Web page

CSAF/csaf_files/OT/white/2025/icsma-25-345-01.json at develop · cisagov/CSAF · GitHub

https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2025/icsma-25-345-01.json

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
gdcm3.0.8-2
  • every version up to 3.0.8-2+deb11u1: fixed in 3.0.8-2+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gdcm3.0.21-1 ... 3.0.24-9 (25 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gdcm3.0.24-10 ... 3.0.24-9 (12 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gdcm3.0.24-10 ... 3.0.24-9 (8 versions)
  • every version up to 3.0.24-11: fixed in 3.0.24-11
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 216 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 120 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-25 16:48 UTCEG score recompute
  9. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-24 01:56 UTCEG score recompute
  12. 2026-10-24 01:56 UTCGHSA enrichmentGHSA-7qcj-ww2g-7w6j · GitHub CVSS 6.6
  13. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-22 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-21 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  16. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-18 05:52 UTCEG score recompute
  20. 2026-10-17 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-16 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-10-13 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  25. 2026-10-12 17:26 UTCEG score recompute
Show 71 more
  1. 2026-10-12 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-11 20:56 UTCEG score recompute
  3. 2026-10-11 19:07 UTCEG score recompute
  4. 2026-10-11 15:47 UTCEG score recompute
  5. 2026-10-11 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-08 17:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-10-07 20:28 UTCEG score recompute
  11. 2026-10-07 20:27 UTCGHSA enrichmentGHSA-7qcj-ww2g-7w6j · GitHub CVSS 6.6
  12. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  15. 2026-10-03 19:21 UTCOSV refresh
  16. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-09-29 15:18 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-09-27 13:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-09-26 15:57 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  23. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  24. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  25. 2026-09-22 14:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  26. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  27. 2026-09-19 15:41 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  28. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  29. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  30. 2026-09-16 05:13 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  31. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  32. 2026-09-14 09:19 UTCOSV refresh
  33. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  34. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  37. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  39. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-09-04 13:59 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  41. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  42. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  43. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  44. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  45. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  46. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  47. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  48. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  49. 2026-08-26 10:13 UTCOSV refresh
  50. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  51. 2026-08-24 14:15 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  52. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  53. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  55. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  56. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  57. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  59. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  60. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  61. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  62. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  63. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  64. 2026-08-10 00:01 UTCEG score recompute
  65. 2026-08-10 00:01 UTCGHSA enrichmentGHSA-7qcj-ww2g-7w6j · GitHub CVSS 6.6
  66. 2026-08-09 13:45 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  67. 2026-08-08 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-08-08 06:52 UTCEG score recompute
  69. 2026-08-08 06:52 UTCGHSA enrichmentGHSA-7qcj-ww2g-7w6j · GitHub CVSS 6.6
  70. 2026-08-06 13:45 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  71. 2026-08-05 19:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

Frequently asked(5)

What is CVE-2025-11266?
CVE-2025-11266 is a medium-severity vulnerability; its CVE record was published on December 12, 2025. An out-of-bounds write vulnerability exists in the Grassroots DICOM library (GDCM). The issue is triggered during parsing of a malformed DICOM file containing encapsulated PixelData fragments (compressed image data stored as multiple fragments). This vulnerability leads to a segmentation fault…
When was CVE-2025-11266 made public?
CVE-2025-11266 was made public on December 11, 2025: that is the date its CVE record's CNA, Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS), gives for when the vulnerability was made public. The CVE record itself was published on December 12, 2025. EchelonGraph's copy of the record carries a last-modified date of October 7, 2026; the record at its source may have been updated since.
Is CVE-2025-11266 actively exploited?
CVE-2025-11266 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-11266?
CVE-2025-11266 has a CVSS v3 base score of 6.6 (NVD).
How do I remediate CVE-2025-11266?
A fix for CVE-2025-11266 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS)) states them: "The maintainer of the software recommends users update Grassroots DICOM (GDCM) to v3.2.2 or later https://github.com/malaterre/GDCM/releases/tag/v3.2.2 from the main GitHub repository."

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