CVE-2025-6021

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-06-12. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
68%
KEV
Not listed

Published

June 12, 2025

Last Modified

September 1, 2026

Advisory Details (10)

Auto-updated Jun 25, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2025:12239
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.2 Advanced Update Support.

https://access.redhat.com/errata/RHSA-2025:12237
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12199
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12099
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP So

https://access.redhat.com/errata/RHSA-2025:12098
redhat Patch Available
https://access.redhat.com/errata/RHSA-2025:11673
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:11580
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:10699
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:10698
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2025:10630

Vendor Advisories for CVE-2025-6021(20)

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

Patch Availability(24)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-libxml2 (2.9.13+dfsg-1ubuntu0.8) @ jammy2026-09-01ubuntu
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat
redhatlibxml22025-10-27redhat
redhatrhcos-413.92.202509030117-02025-09-18redhat
redhatrhcos-412.86.202509030110-02025-09-11redhat
redhatrhcos-417.94.202508141510-02025-08-27redhat
redhatrhcos-415.92.202508192014-02025-08-27redhat
redhatrhcos-414.92.202508041909-02025-08-14redhat
redhatrhcos-416.94.202508050040-02025-08-13redhat
redhatrhcos-418.94.202508060022-02025-08-13redhat
redhatinsights-proxy/insights-proxy-container-rhel9:1.5.5-17545043432025-08-07redhat
redhatdiscovery/discovery-server-rhel9:2.0.1-17544787272025-08-06redhat
redhatlibxml2-0:2.9.7-9.el8_2.32025-07-30redhat
redhatlibxml2-0:2.9.7-9.el8_4.62025-07-30redhat
redhatlibxml2-0:2.9.1-6.el7_9.102025-07-30redhat
redhatlibxml2-0:2.9.7-16.el8_8.92025-07-30redhat
redhatrhcos-4.19.9.6.202507230107-02025-07-29redhat
redhatlibxml2-0:2.9.7-13.el8_6.102025-07-29redhat
redhatlibxml2-0:2.9.13-1.el9_0.52025-07-29redhat
redhatlibxml2-0:2.9.13-3.el9_2.72025-07-29redhat
redhatlibxml2-0:2.9.13-10.el9_42025-07-23redhat
redhatlibxml2-0:2.9.7-21.el8_10.12025-07-09redhat
redhatlibxml2-0:2.9.13-10.el9_62025-07-09redhat
redhatlibxml2-0:2.12.5-7.el10_02025-07-08redhat

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.13.9-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.13.9-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.13.9-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.13.9-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libxml22.9.10+dfsg-6.7 ... 2.9.10+dfsg-6.7+deb11u7 (8 versions)2.9.10+dfsg-6.7+deb11u8—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libxml22.9.14+dfsg-1.2, 2.9.14+dfsg-1.3~deb12u1, 2.9.14+dfsg-1.3~deb12u22.9.14+dfsg-1.3~deb12u3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.12.7+dfsg+really2.9.14-2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libxml2—2.12.7+dfsg+really2.9.14-2—

Weakness Classification(3)

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

Additional Vendor Advisories

(5)

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 16× in last 7d / 40× 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 172 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:11 UTCEPSS rescore
  3. 2026-09-01 13:53 UTCEPSS rescore
  4. 2026-09-01 12:32 UTCEG score recompute
  5. 2026-09-01 12:32 UTCVendor advisory
  6. 2026-09-01 12:32 UTCGHSA enrichment
  7. 2026-09-01 11:57 UTCEG score recompute
  8. 2026-09-01 11:57 UTCVendor advisory
  9. 2026-09-01 11:57 UTCGHSA enrichment
  10. 2026-08-31 18:36 UTCEG score recompute
  11. 2026-08-31 18:36 UTCVendor advisory
  12. 2026-08-31 18:36 UTCGHSA enrichment
  13. 2026-08-31 17:27 UTCEG score recompute
  14. 2026-08-31 17:27 UTCVendor advisory
  15. 2026-08-31 17:27 UTCGHSA enrichment
  16. 2026-08-30 01:21 UTCEPSS rescore
  17. 2026-08-29 00:13 UTCOSV refresh
  18. 2026-08-28 21:40 UTCEPSS rescore
  19. 2026-08-27 14:24 UTCEPSS rescore
  20. 2026-08-26 14:45 UTCEPSS rescore
  21. 2026-08-25 13:48 UTCEPSS rescore
  22. 2026-08-24 14:16 UTCEPSS rescore
  23. 2026-08-23 00:18 UTCEPSS rescore
  24. 2026-08-21 23:48 UTCEPSS rescore
  25. 2026-08-20 22:55 UTCEPSS rescore
Show 75 more
  1. 2026-08-19 17:03 UTCEPSS rescore
  2. 2026-08-18 13:48 UTCEPSS rescore
  3. 2026-08-17 13:46 UTCEPSS rescore
  4. 2026-08-16 14:55 UTCEPSS rescore
  5. 2026-08-16 02:14 UTCEPSS rescore
  6. 2026-08-15 01:30 UTCEPSS rescore
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-12 13:50 UTCEPSS rescore
  9. 2026-08-12 11:40 UTCOSV refresh
  10. 2026-08-11 13:42 UTCEPSS rescore
  11. 2026-08-10 23:59 UTCEPSS rescore
  12. 2026-08-09 13:46 UTCEPSS rescore
  13. 2026-08-08 16:36 UTCEPSS rescore
  14. 2026-08-07 16:27 UTCEPSS rescore
  15. 2026-08-06 13:46 UTCEPSS rescore
  16. 2026-08-05 19:17 UTCEPSS rescore
  17. 2026-08-04 10:37 UTCEPSS rescore
  18. 2026-08-03 10:35 UTCEPSS rescore
  19. 2026-08-02 02:26 UTCEPSS rescore
  20. 2026-08-01 04:15 UTCEPSS rescore
  21. 2026-07-30 16:27 UTCEPSS rescore
  22. 2026-07-30 01:30 UTCEPSS rescore
  23. 2026-07-27 18:55 UTCOSV refresh
  24. 2026-07-27 14:13 UTCEPSS rescore
  25. 2026-07-26 14:54 UTCEPSS rescore
  26. 2026-07-26 14:54 UTCEPSS rescore
  27. 2026-07-25 14:17 UTCEPSS rescore
  28. 2026-07-25 14:17 UTCEPSS rescore
  29. 2026-07-24 14:17 UTCEPSS rescore
  30. 2026-07-23 14:18 UTCEPSS rescore
  31. 2026-07-23 14:18 UTCEPSS rescore
  32. 2026-07-23 03:00 UTCEG score recompute
  33. 2026-07-22 14:08 UTCEPSS rescore
  34. 2026-07-21 15:24 UTCEPSS rescore
  35. 2026-07-20 17:08 UTCEPSS rescore
  36. 2026-07-19 14:30 UTCEPSS rescore
  37. 2026-07-19 14:30 UTCEPSS rescore
  38. 2026-07-19 02:28 UTCEPSS rescore
  39. 2026-07-19 02:28 UTCEPSS rescore
  40. 2026-07-18 10:04 UTCEPSS rescore
  41. 2026-07-18 10:04 UTCEPSS rescore
  42. 2026-07-16 17:02 UTCEPSS rescore
  43. 2026-07-16 17:02 UTCEPSS rescore
  44. 2026-07-15 16:57 UTCEPSS rescore
  45. 2026-07-15 16:57 UTCEPSS rescore
  46. 2026-07-15 02:00 UTCEPSS rescore
  47. 2026-07-15 01:59 UTCEPSS rescore
  48. 2026-07-13 06:12 UTCEPSS rescore
  49. 2026-07-12 05:46 UTCEPSS rescore
  50. 2026-07-12 05:46 UTCEPSS rescore
  51. 2026-07-11 08:27 UTCEPSS rescore
  52. 2026-07-11 08:27 UTCEPSS rescore
  53. 2026-07-10 11:52 UTCOSV refresh
  54. 2026-07-09 19:10 UTCEPSS rescore
  55. 2026-07-08 15:15 UTCEPSS rescore
  56. 2026-07-07 13:46 UTCEPSS rescore
  57. 2026-07-06 16:27 UTCEPSS rescore
  58. 2026-07-06 02:23 UTCEPSS rescore
  59. 2026-07-05 02:30 UTCEPSS rescore
  60. 2026-07-05 02:30 UTCEPSS rescore
  61. 2026-07-04 06:31 UTCEPSS rescore
  62. 2026-07-04 06:31 UTCEPSS rescore
  63. 2026-07-01 15:06 UTCEPSS rescore
  64. 2026-06-30 23:22 UTCEPSS rescore
  65. 2026-06-30 23:22 UTCEPSS rescore
  66. 2026-06-29 14:06 UTCEPSS rescore
  67. 2026-06-29 14:06 UTCEPSS rescore
  68. 2026-06-28 14:07 UTCEPSS rescore
  69. 2026-06-28 14:07 UTCEPSS rescore
  70. 2026-06-28 04:56 UTCEPSS rescore
  71. 2026-06-28 04:56 UTCEPSS rescore
  72. 2026-06-27 03:08 UTCEPSS rescore
  73. 2026-06-25 13:49 UTCEPSS rescore
  74. 2026-06-25 13:49 UTCEPSS rescore
  75. 2026-06-24 14:05 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-6021?
CVE-2025-6021 is a high vulnerability published on June 12, 2025. A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.
When was CVE-2025-6021 disclosed?
CVE-2025-6021 was first published in the National Vulnerability Database on June 12, 2025, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-6021 actively exploited?
CVE-2025-6021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 32.1% of all scored CVEs.
What is the CVSS score of CVE-2025-6021?
CVE-2025-6021 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-6021?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-6021, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-6021

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