CVE-2025-6395

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2025-07-10. The CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week
6.5EG
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: 0.8%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A NULL pointer dereference flaw was found in the GnuTLS software in _gnutls_figure_common_ciphersuite().

CVSS v3
6.5
EG Score
6.5MEDIUMmedium 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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.8% × 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
0.8%
EPSS %ILE
54th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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: 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.

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

July 10, 2025

Last Modified

October 15, 2026

Advisory Details (10)

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

2376755 – (CVE-2025-6395) CVE-2025-6395 gnutls: NULL pointer dereference in _gnutls_figure_common_ciphersuite()

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2376755
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2025-6395
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2025:22529
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2025:19088
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:17415
Red HatMentions a patch (unverified)

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

https://access.redhat.com/errata/RHSA-2025:17361
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:17348
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2025:17181
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:16116
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2025:16115

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgnutls30t64 (3.8.9-2ubuntu3.1) @ plucky2026-10-15ubuntu
ubuntulibgnutlsxx28 (3.6.13-2ubuntu1.12+esm1) @ focal2026-10-15ubuntu
redhatrhceph/rhceph-7-rhel9:72025-12-01redhat
redhatdiscovery/discovery-ui-rhel9:2.3.0-17605543842025-10-23redhat
redhatgnutls-0:3.6.16-8.el8_10.42025-10-07redhat
redhatgnutls-0:3.7.6-21.el9_2.42025-10-06redhat
redhatgnutls-0:3.8.3-4.el9_4.42025-10-06redhat
redhatinsights-proxy/insights-proxy-container-rhel9:1.5.7-17593319892025-10-01redhat
redhatgnutls-0:3.8.3-6.el9_6.22025-09-17redhat
redhatgnutls-0:3.8.9-9.el10_0.142025-09-17redhat

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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.12-r0: fixed in 3.8.12-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.11-r0: fixed in 3.8.11-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls—
  • every version up to 3.8.11-r0: fixed in 3.8.11-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.1-5 ... 3.7.1-5+deb11u7 (8 versions)
  • every version up to 3.7.1-5+deb11u8: fixed in 3.7.1-5+deb11u8
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls283.7.9-2, 3.7.9-2+deb12u1, 3.7.9-2+deb12u2, 3.7.9-2+deb12u3, 3.7.9-2+deb12u4
  • every version up to 3.7.9-2+deb12u5: fixed in 3.7.9-2+deb12u5
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls28—
  • every version up to 3.8.9-3: fixed in 3.8.9-3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gnutls28—
  • every version up to 3.8.9-3: fixed in 3.8.9-3
—

Weakness Classification(1)

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

Additional Vendor Advisories

(4)

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 11× in last 7d / 34× 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 226 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 127 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  2. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  3. 2026-10-18 05:20 UTCEG score recompute
  4. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  5. 2026-10-16 16:39 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  6. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  7. 2026-10-15 01:58 UTCEG score recompute
  8. 2026-10-15 01:58 UTCVendor advisory
  9. 2026-10-15 01:58 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  10. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  11. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  12. 2026-10-12 16:50 UTCEG score recompute
  13. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  14. 2026-10-11 20:24 UTCEG score recompute
  15. 2026-10-11 18:36 UTCEG score recompute
  16. 2026-10-11 15:11 UTCEG score recompute
  17. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  18. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  19. 2026-10-10 01:03 UTCOSV refresh
  20. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  22. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  25. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
Show 74 more
  1. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  3. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  4. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  9. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-09-20 09:03 UTCOSV refresh
  11. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  22. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  23. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  24. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  25. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  26. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  27. 2026-09-01 12:31 UTCEG score recompute
  28. 2026-09-01 12:31 UTCVendor advisory
  29. 2026-09-01 12:30 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  30. 2026-09-01 11:57 UTCEG score recompute
  31. 2026-09-01 11:57 UTCVendor advisory
  32. 2026-09-01 11:57 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  33. 2026-08-31 16:43 UTCEG score recompute
  34. 2026-08-31 16:43 UTCVendor advisory
  35. 2026-08-31 16:43 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  36. 2026-08-31 15:09 UTCEG score recompute
  37. 2026-08-31 15:09 UTCVendor advisory
  38. 2026-08-31 15:09 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  39. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  40. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  41. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  42. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  43. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  44. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  45. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  46. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  47. 2026-08-21 13:24 UTCEG score recompute
  48. 2026-08-21 13:24 UTCVendor advisory
  49. 2026-08-21 13:24 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  50. 2026-08-21 12:51 UTCEG score recompute
  51. 2026-08-21 12:51 UTCVendor advisory
  52. 2026-08-21 12:51 UTCGHSA enrichmentGHSA-prf7-7jvx-hxj5 · GitHub CVSS 6.5
  53. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  54. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.7% · 48th percentile
  55. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  56. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  57. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  58. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  59. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  60. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  61. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  62. 2026-08-12 09:54 UTCOSV refresh
  63. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  64. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  65. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  66. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  67. 2026-08-07 16:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  68. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  70. 2026-08-04 10:37 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  71. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  72. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  73. 2026-08-01 04:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  74. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile

Frequently asked(5)

What is CVE-2025-6395?
CVE-2025-6395 is a medium-severity vulnerability; its CVE record was published on July 10, 2025. A NULL pointer dereference flaw was found in the GnuTLS software in gnutlsfigurecommonciphersuite().
When was CVE-2025-6395 made public?
CVE-2025-6395 was made public on July 10, 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 July 10, 2025. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2025-6395 actively exploited?
CVE-2025-6395 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-6395?
CVE-2025-6395 has a CVSS base score of 6.5 (the CNA's own assessment, by redhat; NVD's own analysis pending).
How do I remediate CVE-2025-6395?
A fix for CVE-2025-6395 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-6395 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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