CVE-2026-64314

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

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

Score 5.5 from GitHub Security Advisory published 2026-07-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.5EG
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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

crypto: chacha20poly1305 - validate poly1305 template argument

chachapoly_create() still accepts the compatibility poly1305 parameter in the template name, but it assumes the second template argument is always present and immediately passes it to strcmp().

When the argument is missing, crypto_attr_alg_name() returns an error pointer. Check for that before comparing the name so malformed template instantiations fail with an error instead of dereferencing the error pointer in strcmp().

This matches the surrounding Crypto API template pattern where crypto_attr_alg_name() results are validated before string-specific use.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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
0.2%
EPSS %ILE
4th
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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 25, 2026

Last Modified

September 3, 2026

Advisory Details (3)

Auto-updated Sep 3, 2026
Patch available.
Web page

crypto: chacha20poly1305 - validate poly1305 template argument - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e74df53b36cdc6b6b9e5488ec883d1d55624737f
Web page

crypto: chacha20poly1305 - validate poly1305 template argument - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/265b861bece38318b8e0fc8fac0643d4ef906d31
Web page

crypto: chacha20poly1305 - validate poly1305 template argument - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0016d3c21c6ab60a20be7f565cefb5999f3adeb6

Vendor Advisories for CVE-2026-64314(1)

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

Patch Availability(11)

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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (159 versions)
  • every version up to 7.1.4-1: fixed in 7.1.4-1
—

Weakness Classification(1)

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

All Vendor Advisories

(11)

Data Freshness Timeline

(refreshed 10× 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 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 100 of 150 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. None are among the latest 100 rows. The 50 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-12 15:48 UTCEG score recompute
  4. 2026-10-11 19:32 UTCEG score recompute
  5. 2026-10-11 16:47 UTCEG score recompute
  6. 2026-10-11 14:09 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-07 06:18 UTCEG score recompute
  12. 2026-10-07 06:18 UTCVendor advisory
  13. 2026-10-07 06:18 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-04 07:37 UTCEG score recompute
  18. 2026-10-04 07:37 UTCVendor advisory
  19. 2026-10-04 07:37 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-10-02 19:36 UTCEG score recompute
  22. 2026-10-02 19:36 UTCVendor advisory
  23. 2026-10-02 19:36 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
Show 75 more
  1. 2026-10-01 04:25 UTCEG score recompute
  2. 2026-10-01 04:25 UTCVendor advisory
  3. 2026-10-01 04:25 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  4. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-09-28 04:19 UTCEG score recompute
  7. 2026-09-28 04:19 UTCVendor advisory
  8. 2026-09-28 04:19 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  9. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-09-25 09:54 UTCEG score recompute
  11. 2026-09-25 09:54 UTCVendor advisory
  12. 2026-09-25 09:53 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  13. 2026-09-24 00:52 UTCEG score recompute
  14. 2026-09-24 00:52 UTCVendor advisory
  15. 2026-09-24 00:52 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  16. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-09-22 22:05 UTCEG score recompute
  18. 2026-09-22 22:05 UTCVendor advisory
  19. 2026-09-22 22:05 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-09-20 01:33 UTCEG score recompute
  22. 2026-09-20 01:33 UTCVendor advisory
  23. 2026-09-20 01:33 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-09-18 02:50 UTCEG score recompute
  26. 2026-09-18 02:50 UTCVendor advisory
  27. 2026-09-18 02:50 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  28. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  29. 2026-09-16 11:57 UTCEG score recompute
  30. 2026-09-16 11:57 UTCVendor advisory
  31. 2026-09-16 11:57 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  32. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  33. 2026-09-15 09:26 UTCEG score recompute
  34. 2026-09-15 09:26 UTCVendor advisory
  35. 2026-09-15 09:26 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  36. 2026-09-13 21:38 UTCEG score recompute
  37. 2026-09-13 21:38 UTCVendor advisory
  38. 2026-09-13 21:38 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  39. 2026-09-12 18:28 UTCVendor advisory
  40. 2026-09-12 18:28 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  41. 2026-09-11 16:28 UTCEG score recompute
  42. 2026-09-11 16:28 UTCVendor advisory
  43. 2026-09-11 16:28 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  44. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  45. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  46. 2026-09-10 13:29 UTCEG score recompute
  47. 2026-09-10 13:29 UTCVendor advisory
  48. 2026-09-10 13:29 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  49. 2026-09-09 08:38 UTCEG score recompute
  50. 2026-09-09 08:38 UTCVendor advisory
  51. 2026-09-09 08:38 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  52. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  53. 2026-09-07 21:18 UTCEG score recompute
  54. 2026-09-07 21:18 UTCVendor advisory
  55. 2026-09-07 21:18 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  56. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  57. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  58. 2026-09-05 19:52 UTCEG score recompute
  59. 2026-09-05 19:52 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  60. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  61. 2026-09-04 17:53 UTCEG score recompute
  62. 2026-09-04 17:53 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr · GitHub CVSS 5.5
  63. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  64. 2026-09-03 15:53 UTCEG score recomputeFirst assessed: 5.5 MEDIUM
  65. 2026-09-03 15:53 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr
  66. 2026-09-03 15:51 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  67. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  68. 2026-09-01 23:14 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr
  69. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  70. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  71. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  72. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  73. 2026-08-30 00:10 UTCGHSA enrichmentGHSA-8q9p-r3g4-95mr
  74. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  75. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile

Frequently asked(5)

What is CVE-2026-64314?
CVE-2026-64314 is a medium-severity vulnerability; its CVE record was published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: chacha20poly1305 - validate poly1305 template argument chachapoly_create() still accepts the compatibility poly1305 parameter in the template name, but it assumes the second template argument is always present and…
When was the CVE record for CVE-2026-64314 published?
The CVE record for CVE-2026-64314 was published on July 25, 2026. 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 September 3, 2026; the record at its source may have been updated since.
Is CVE-2026-64314 actively exploited?
CVE-2026-64314 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64314?
CVE-2026-64314 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64314?
A fix for CVE-2026-64314 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64314 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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