CVE-2025-34297

HIGHPre-NVD 8.68.6
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (7th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 5 sources updated this weekElevated

Also known asEUVD-2025-200096 (ENISA EUVD) · GHSA-4q9h-j8g6-f49h (GitHub Security Advisories)Source: ENISA EUVD

8.6EG
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: 0.2%CVSS: 8.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

KissFFT versions prior to the fix commit 1b083165 contain an integer overflow in kiss_fft_alloc() in kiss_fft.c on platforms where size_t is 32-bit. The nfft parameter is not validated before being used in a size calculation (sizeof(kiss_fft_cpx) * (nfft - 1)), which can wrap to a small value when nfft is large. As a result, malloc() allocates an undersized buffer and the subsequent twiddle-factor initialization loop writes nfft elements, causing a heap buffer overflow. This vulnerability only affects 32-bit architectures.

CVSS v3
8.6
EG Score
8.6HIGHmedium confidence
EG Risk
55
EG Risk 55/100

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)
Severity86% × 45%
Impact severity (EG Severity): CVSS 8.6 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.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.2%
EPSS %ILE
7th
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 (8.6): severity, escalated by confirmed exploitation. This CVE's 8.6 is its impact severity (EG Severity), not escalated.

EG Severity
8.6 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% 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 low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 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 low, Track* at medium and Attend at high mission impact.

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 no (CISA Vulnrichment) · Technical impact total (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; 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 total (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 1, 2025

Last Modified

October 18, 2026

Advisory Details (3)

Auto-updated Jul 14, 2026
Patch available. Sources: github_commit.
Web page

KissFFT Integer Overflow Heap Buffer Overflow via kiss_fft_alloc | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kissfft-integer-overflow-heap-buffer-overflow
Web page

KissFFT Allocation Function Integer Overflow on 32-bit Systems · Issue #120 · mborgerding/kissfft · GitHub

https://github.com/mborgerding/kissfft/issues/120
GitHub commit

commit 1b0831658204 (mborgerding/kissfft)

Fix landed in mborgerding/kissfft commit 1b0831658204 — awaiting tagged release

https://github.com/mborgerding/kissfft/commit/1b08316582049c3716154caefc0deab8758506e3

Vendor Advisories for CVE-2025-34297(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibkissfft-float131 (131.1.0-4ubuntu0.1~esm1) @ resolute2026-10-29ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
kissfft131.1.0-1
  • every version up to 131.1.0-1+deb11u1: fixed in 131.1.0-1+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
kissfft131.1.0-3, 131.1.0-4
  • every version up to 131.1.0-4.1~deb12u1: fixed in 131.1.0-4.1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
kissfft131.1.0-3, 131.1.0-4, 131.1.0-4.1~deb12u1
  • every version up to 131.1.0-4.1~deb13u1: fixed in 131.1.0-4.1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
kissfft131.1.0-3, 131.1.0-4, 131.1.0-4.1~deb12u1, 131.1.0-4.1~deb13u1
  • every version up to 131.1.0-4.1: fixed in 131.1.0-4.1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 / 48× 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 98 of 234 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. 2 repeat rows among the latest 100 are merged into the row they repeat. The 136 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 0.2% · 7th percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-29 22:27 UTCEG score recompute
  5. 2026-10-29 22:27 UTCVendor advisory
  6. 2026-10-29 22:27 UTCGHSA enrichmentGHSA-4q9h-j8g6-f49h · GitHub severity HIGH
  7. 2026-10-29 20:25 UTCOSV refresh
  8. 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-25 16:33 UTCEG score recompute
  13. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-22 11:22 UTCEG score recompute
  18. 2026-10-22 11:22 UTCVendor advisory
  19. 2026-10-22 11:22 UTCGHSA enrichmentGHSA-4q9h-j8g6-f49h · GitHub severity HIGH
  20. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-18 20:35 UTCVendor advisory
  24. 2026-10-18 20:35 UTCGHSA enrichmentGHSA-4q9h-j8g6-f49h · GitHub severity HIGH
  25. 2026-10-18 17:20 UTCEG score recompute
Show 73 more
  1. 2026-10-18 17:20 UTCVendor advisory
  2. 2026-10-18 17:20 UTCGHSA enrichmentGHSA-4q9h-j8g6-f49h · GitHub severity HIGH
  3. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-18 05:37 UTCEG score recompute
  5. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-12 17:09 UTCEG score recompute
  11. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-11 20:42 UTCEG score recompute
  13. 2026-10-11 18:52 UTCEG score recompute
  14. 2026-10-11 15:29 UTCEG score recompute
  15. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-08 17:09 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-10-01 08:10 UTCOSV refresh
  26. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  28. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  29. 2026-09-26 00:24 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  30. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  31. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  32. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  33. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  35. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  36. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  37. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  38. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  39. 2026-09-12 08:53 UTCOSV refresh
  40. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  41. 2026-09-11 09:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  42. 2026-09-10 09:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  43. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  45. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  46. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  47. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  48. 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  49. 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  51. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  53. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  54. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  55. 2026-08-24 14:02 UTCOSV refresh
  56. 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  57. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  59. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  60. 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  61. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  62. 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  63. 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  64. 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  65. 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  66. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  67. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  68. 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  69. 2026-08-08 09:01 UTCEG score recompute
  70. 2026-08-08 09:01 UTCVendor advisory
  71. 2026-08-08 09:01 UTCGHSA enrichmentGHSA-4q9h-j8g6-f49h · GitHub severity HIGH
  72. 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  73. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile

Related CVEs(same product + same vendor + same CWE)

Same product

1 shown

Debian:11:kissfft

Same vendor

1 shown

ubuntu:USN-8745-1

Frequently asked(5)

What is CVE-2025-34297?
CVE-2025-34297 is a high-severity vulnerability; its CVE record was published on December 1, 2025. KissFFT versions prior to the fix commit 1b083165 contain an integer overflow in kiss_fft_alloc() in kiss_fft.c on platforms where size_t is 32-bit. The nfft parameter is not validated before being used in a size calculation (sizeof(kiss_fft_cpx) * (nfft - 1)), which can wrap to a small value when…
When was the CVE record for CVE-2025-34297 published?
The CVE record for CVE-2025-34297 was published on December 1, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 18, 2026; the record at its source may have been updated since.
Is CVE-2025-34297 actively exploited?
CVE-2025-34297 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-34297?
CVE-2025-34297 has a CVSS base score of 8.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-34297?
A fix for CVE-2025-34297 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-34297 are linked in the Vendor Advisories panel on this page.

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