CVE-2026-95619

HIGHPre-NVD 7.77.7
EchelonGraph scoreMEDIUM confidence

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

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-09-22. A secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-84373 (ENISA EUVD) · GHSA-9cg4-x5gg-7ww7 (GitHub Security Advisories)Source: ENISA EUVD

7.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libstdc++. An integer overflow can occur when processing large inputs to the aligned operator new in the C++ library. This vulnerability could lead to an undersized memory allocation, potentially causing memory corruption or application instability.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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
0.5%
EPSS %ILE
42nd
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS. 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

September 22, 2026

Last Modified

November 11, 2026

Advisory Details (2)

Auto-updated Sep 22, 2026
Patch available. Sources: redhat.
Red Hat

2537811 – (CVE-2026-95619) CVE-2026-95619 gcc: libstd++: libstdc++ integer overflow in `new` operator

https://bugzilla.redhat.com/show_bug.cgi?id=2537811
Red HatMentions a patch (unverified)

CVE-2026-95619 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 and 9. An integer overflow in the

https://access.redhat.com/security/cve/CVE-2026-95619

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatgcc-0:8.5.0-30.el8_102026-10-26redhat
redhatgcc13-main-13.5.0-0.1.hum12026-09-14redhat
redhatgcc-main-16.2.1-2.hum12026-08-22redhat

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 3 ecosystems)
Debian:14(5)
PackageVulnerable rangeFix by version rangeDependents
gcc-1212.4.0-5 ... 12.5.0-9 (16 versions)
  • every version on: no fix on record
—
gcc-1313.3.0-16 ... 13.5.0-2 (17 versions)
  • every version up to 13.5.0-3: fixed in 13.5.0-3
—
gcc-1414.2.0-19 ... 14.4.0-2 (25 versions)
  • every version up to 14.4.0-3: fixed in 14.4.0-3
—
gcc-1515-20241128-1 ... 15.3.0-4 (51 versions)
  • every version up to 15.3.0-5: fixed in 15.3.0-5
—
gcc-1616-20251130-1 ... 16.2.0-3 (25 versions)
  • every version up to 16.2.0-4: fixed in 16.2.0-4
—
Debian:13(3)
PackageVulnerable rangeFix by version rangeDependents
gcc-1212.4.0-5 ... 12.5.0-9 (16 versions)
  • every version on: no fix on record
—
gcc-1313.3.0-16 ... 13.5.0-4 (19 versions)
  • every version on: no fix on record
—
gcc-1414.2.0-19 ... 14.4.0-4 (27 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gcc-1212.2.0-14 ... 12.5.0-9 (47 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 60× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 214 rows 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. None are among the latest 100 rows. The 114 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:58 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-11-11 20:40 UTCEchelonGraph re-scored
  4. 2026-11-11 20:40 UTCVendor advisory
  5. 2026-11-11 20:40 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  6. 2026-11-11 19:24 UTCEchelonGraph re-scored
  7. 2026-11-11 19:24 UTCVendor advisory
  8. 2026-11-11 19:23 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  9. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.4% · 39th percentile
  10. 2026-11-11 13:28 UTCEchelonGraph re-scored
  11. 2026-11-11 13:28 UTCVendor advisory
  12. 2026-11-11 13:28 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  13. 2026-11-11 12:24 UTCEchelonGraph re-scored
  14. 2026-11-11 12:24 UTCVendor advisory
  15. 2026-11-11 12:24 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  16. 2026-11-10 16:46 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  17. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  18. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  19. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  20. 2026-11-06 16:40 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  21. 2026-11-06 08:27 UTCVendor advisory
  22. 2026-11-06 08:27 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  23. 2026-11-06 03:27 UTCEchelonGraph re-scored
  24. 2026-11-06 03:27 UTCVendor advisory
  25. 2026-11-06 03:27 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
Show 75 more
  1. 2026-11-06 02:28 UTCEchelonGraph re-scored
  2. 2026-11-06 02:28 UTCVendor advisory
  3. 2026-11-06 02:28 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  4. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  5. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  6. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  7. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  8. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  9. 2026-11-01 06:47 UTCEchelonGraph re-scored
  10. 2026-11-01 06:47 UTCVendor advisory
  11. 2026-11-01 06:47 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  12. 2026-11-01 04:33 UTCEchelonGraph re-scored
  13. 2026-11-01 04:33 UTCVendor advisory
  14. 2026-11-01 04:33 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  15. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  16. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  17. 2026-10-30 06:26 UTCEchelonGraph re-scored
  18. 2026-10-30 06:26 UTCVendor advisory
  19. 2026-10-30 06:26 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  20. 2026-10-30 06:06 UTCEchelonGraph re-scored
  21. 2026-10-30 06:06 UTCVendor advisory
  22. 2026-10-30 06:06 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  23. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  24. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  25. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  26. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  27. 2026-10-26 14:38 UTCEchelonGraph re-scored
  28. 2026-10-26 14:38 UTCVendor advisory
  29. 2026-10-26 14:38 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  30. 2026-10-26 14:04 UTCEchelonGraph re-scored
  31. 2026-10-26 14:04 UTCVendor advisory
  32. 2026-10-26 14:03 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  33. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  34. 2026-10-25 13:48 UTCEchelonGraph re-scored
  35. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  36. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  37. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  38. 2026-10-22 15:33 UTCEchelonGraph re-scored
  39. 2026-10-22 15:33 UTCVendor advisory
  40. 2026-10-22 15:33 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  41. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  42. 2026-10-20 17:45 UTCEchelonGraph re-scored
  43. 2026-10-20 17:45 UTCVendor advisory
  44. 2026-10-20 17:45 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  45. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  46. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  47. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  48. 2026-10-18 02:57 UTCEchelonGraph re-scored
  49. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  50. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  51. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  52. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  53. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  54. 2026-10-13 04:11 UTCEchelonGraph re-scored
  55. 2026-10-13 04:11 UTCVendor advisory
  56. 2026-10-13 04:11 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  57. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  58. 2026-10-12 14:41 UTCEchelonGraph re-scored
  59. 2026-10-11 19:11 UTCEchelonGraph re-scored
  60. 2026-10-11 18:30 UTCVendor advisory
  61. 2026-10-11 18:30 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  62. 2026-10-11 16:27 UTCEchelonGraph re-scored
  63. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  64. 2026-10-11 13:39 UTCEchelonGraph re-scored
  65. 2026-10-11 06:07 UTCEchelonGraph re-scored
  66. 2026-10-11 06:07 UTCVendor advisory
  67. 2026-10-11 06:07 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  68. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  69. 2026-10-10 18:01 UTCVendor advisory
  70. 2026-10-10 18:01 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  71. 2026-10-10 05:55 UTCEchelonGraph re-scored
  72. 2026-10-10 05:55 UTCVendor advisory
  73. 2026-10-10 05:55 UTCGHSA enrichmentGHSA-9cg4-x5gg-7ww7 · GitHub severity HIGH · GitHub CVSS 7.7
  74. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  75. 2026-10-09 17:49 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-95619?
CVE-2026-95619 is a high-severity vulnerability; its CVE record was published on September 22, 2026. A flaw was found in libstdc++. An integer overflow can occur when processing large inputs to the aligned operator new in the C++ library. This vulnerability could lead to an undersized memory allocation, potentially causing memory corruption or application instability.
When was CVE-2026-95619 made public?
CVE-2026-95619 was made public on September 22, 2026: 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 September 22, 2026. EchelonGraph's copy of the record carries a last-modified date of November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-95619 actively exploited?
CVE-2026-95619 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-95619?
CVE-2026-95619 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-95619?
A fix for CVE-2026-95619 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-95619 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-2026-95619

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Is Your Infrastructure Affected by CVE-2026-95619?

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