CVE-2025-6021

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.4%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
1.4%
EPSS %ILE
71st
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). 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 low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

June 12, 2025

Last Modified

October 12, 2026

Advisory Details (10)

Auto-updated Jun 25, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)

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
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.2 Advanced Update Support.

https://access.redhat.com/errata/RHSA-2025:12237
Red HatMentions a patch (unverified)

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

https://access.redhat.com/errata/RHSA-2025:12199
Red HatMentions a patch (unverified)

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

https://access.redhat.com/errata/RHSA-2025:12099
Red HatMentions a patch (unverified)

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
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2025:11673
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:11580
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:10699
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:10698
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.

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

Patch Availability(24)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython-libxml2 (2.9.3+dfsg1-1ubuntu0.7+esm9) @ xenial2026-10-20ubuntu
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat
redhatlibxml22025-10-27redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202509030117-02025-09-18redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202509030110-02025-09-11redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202508141510-02025-08-27redhat
redhatopenshift/ose-rhel-coreos-9:415.92.202508192014-02025-08-27redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202508041909-02025-08-14redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202508050040-02025-08-13redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202508060022-02025-08-13redhat
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
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202507230107-02025-07-29redhat
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 rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.10+dfsg-6.7 ... 2.9.10+dfsg-6.7+deb11u7 (8 versions)
  • every version up to 2.9.10+dfsg-6.7+deb11u8: fixed in 2.9.10+dfsg-6.7+deb11u8
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.14+dfsg-1.2, 2.9.14+dfsg-1.3~deb12u1, 2.9.14+dfsg-1.3~deb12u2
  • every version up to 2.9.14+dfsg-1.3~deb12u3: fixed in 2.9.14+dfsg-1.3~deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.12.7+dfsg+really2.9.14-2: fixed in 2.12.7+dfsg+really2.9.14-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.12.7+dfsg+really2.9.14-2: fixed in 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)

Data Freshness Timeline

(refreshed 11× in last 7d / 40× 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 99 of 231 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 132 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 10:04 UTCEG score recompute
  2. 2026-10-20 10:04 UTCVendor advisory
  3. 2026-10-20 10:04 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  4. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  5. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  6. 2026-10-18 05:22 UTCEG score recompute
  7. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  8. 2026-10-16 16:39 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  9. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  10. 2026-10-14 16:31 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  11. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  12. 2026-10-12 21:26 UTCEG score recompute
  13. 2026-10-12 21:26 UTCVendor advisory
  14. 2026-10-12 21:26 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  15. 2026-10-12 20:26 UTCEG score recompute
  16. 2026-10-12 20:26 UTCVendor advisory
  17. 2026-10-12 20:26 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  18. 2026-10-12 16:53 UTCEG score recompute
  19. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  20. 2026-10-11 20:27 UTCEG score recompute
  21. 2026-10-11 18:38 UTCEG score recompute
  22. 2026-10-11 15:13 UTCEG score recompute
  23. 2026-10-11 13:47 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  24. 2026-10-10 19:59 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  25. 2026-10-09 20:06 UTCEPSS rescoreEPSS 1.4% · 71st percentile
Show 74 more
  1. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  2. 2026-10-08 12:35 UTCOSV refresh
  3. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.4% · 71st percentile
  4. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  5. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  6. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  7. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  8. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  9. 2026-09-30 15:02 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  10. 2026-09-29 15:20 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  11. 2026-09-28 13:50 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  12. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  13. 2026-09-24 14:02 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  14. 2026-09-23 13:47 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  15. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  16. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  17. 2026-09-18 18:33 UTCEG score recompute
  18. 2026-09-18 18:33 UTCVendor advisory
  19. 2026-09-18 18:33 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-09-18 17:44 UTCEG score recompute
  21. 2026-09-18 17:44 UTCVendor advisory
  22. 2026-09-18 17:44 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  24. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  25. 2026-09-16 05:14 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  26. 2026-09-15 03:10 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  27. 2026-09-13 16:46 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  28. 2026-09-12 15:00 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  29. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  30. 2026-09-11 09:36 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  31. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  32. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  33. 2026-09-07 16:00 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  35. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  36. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  37. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  38. 2026-09-01 12:32 UTCEG score recompute
  39. 2026-09-01 12:32 UTCVendor advisory
  40. 2026-09-01 12:32 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-09-01 11:57 UTCEG score recompute
  42. 2026-09-01 11:57 UTCVendor advisory
  43. 2026-09-01 11:57 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  44. 2026-08-31 18:36 UTCEG score recompute
  45. 2026-08-31 18:36 UTCVendor advisory
  46. 2026-08-31 18:36 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-08-31 17:27 UTCEG score recompute
  48. 2026-08-31 17:27 UTCVendor advisory
  49. 2026-08-31 17:27 UTCGHSA enrichmentGHSA-32vr-5hxf-x93f · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-08-30 01:21 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  51. 2026-08-29 00:13 UTCOSV refresh
  52. 2026-08-28 21:40 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  53. 2026-08-27 14:24 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  54. 2026-08-26 14:45 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  55. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  56. 2026-08-24 14:16 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  57. 2026-08-23 00:18 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  58. 2026-08-21 23:48 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  59. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  60. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  61. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  62. 2026-08-17 13:46 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  63. 2026-08-16 14:55 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  64. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  65. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  66. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  67. 2026-08-12 13:50 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  68. 2026-08-12 11:40 UTCOSV refresh
  69. 2026-08-11 13:42 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  70. 2026-08-10 23:59 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  71. 2026-08-09 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  72. 2026-08-08 16:36 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  73. 2026-08-07 16:27 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
  74. 2026-08-06 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile

Frequently asked(5)

What is CVE-2025-6021?
CVE-2025-6021 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2025-6021 was made public on June 12, 2025: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on June 12, 2025. EchelonGraph's copy of the record carries a last-modified date of October 12, 2026; the record at its source may have been updated since.
Is CVE-2025-6021 actively exploited?
CVE-2025-6021 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.4% probability of exploitation in the next 30 days (71st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-6021?
CVE-2025-6021 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-6021?
A fix for CVE-2025-6021 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-6021 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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

Explore →

Is Your Infrastructure Affected by CVE-2025-6021?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.