CVE-2026-64354

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-25. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

bpf: Validate BTF repeated field counts before expansion

btf_parse_struct_metas() walks user-supplied BTF during BPF_BTF_LOAD, and btf_repeat_fields() expands repeatable fields from array elements into the fixed BTF_FIELDS_MAX scratch array used by btf_parse_fields().

The remaining-capacity check performs the expanded field count calculation in u32. A malformed BTF can wrap that calculation, causing the check to pass even when the expanded field count exceeds the scratch array capacity. The following memcpy() can then write past the end of the array.

Use checked addition and multiplication before copying repeated fields and reject impossible counts.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

bpf: Validate BTF repeated field counts before expansion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ff77d013b737c0f77d925e2f2c59f0cf3d76bd35
generic

bpf: Validate BTF repeated field counts before expansion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cd407de2ef5dc70f1970b343ffaa16186340fdfd
generic

bpf: Validate BTF repeated field counts before expansion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c5ff816d5f13900c3f1f3298cfcc61339e056e56
generic

bpf: Validate BTF repeated field counts before expansion - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b9452b594fd3aecbfd4aa0a6a1f741330a37dab7

Vendor Advisories for CVE-2026-64354(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1—

Data Freshness Timeline

(refreshed 19× in last 7d / 105× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:10 UTCEG score recompute
  3. 2026-08-30 00:10 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 22:40 UTCEG score recompute
  6. 2026-08-27 22:40 UTCGHSA enrichment
  7. 2026-08-27 09:58 UTCGHSA enrichment
  8. 2026-08-26 21:14 UTCEG score recompute
  9. 2026-08-26 21:14 UTCGHSA enrichment
  10. 2026-08-26 14:47 UTCEPSS rescore
  11. 2026-08-26 08:28 UTCGHSA enrichment
  12. 2026-08-25 19:45 UTCEG score recompute
  13. 2026-08-25 19:45 UTCGHSA enrichment
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-25 07:03 UTCGHSA enrichment
  16. 2026-08-24 18:20 UTCEG score recompute
  17. 2026-08-24 18:20 UTCGHSA enrichment
  18. 2026-08-24 05:36 UTCGHSA enrichment
  19. 2026-08-23 16:53 UTCGHSA enrichment
  20. 2026-08-23 04:10 UTCEG score recompute
  21. 2026-08-23 04:10 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 15:27 UTCGHSA enrichment
  24. 2026-08-22 02:43 UTCGHSA enrichment
  25. 2026-08-21 13:58 UTCGHSA enrichment
Show 75 more
  1. 2026-08-21 00:53 UTCEG score recompute
  2. 2026-08-21 00:53 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 12:11 UTCGHSA enrichment
  5. 2026-08-19 23:27 UTCEG score recompute
  6. 2026-08-19 23:27 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 10:44 UTCGHSA enrichment
  9. 2026-08-18 22:00 UTCEG score recompute
  10. 2026-08-18 21:59 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 09:14 UTCGHSA enrichment
  13. 2026-08-17 20:19 UTCEG score recompute
  14. 2026-08-17 20:19 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 05:19 UTCEG score recompute
  17. 2026-08-17 05:19 UTCGHSA enrichment
  18. 2026-08-16 22:21 UTCEG score recompute
  19. 2026-08-16 22:21 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 09:37 UTCEG score recompute
  22. 2026-08-16 09:37 UTCGHSA enrichment
  23. 2026-08-15 20:55 UTCGHSA enrichment
  24. 2026-08-15 08:12 UTCEG score recompute
  25. 2026-08-15 08:12 UTCGHSA enrichment
  26. 2026-08-15 01:30 UTCEPSS rescore
  27. 2026-08-14 19:29 UTCGHSA enrichment
  28. 2026-08-14 06:46 UTCEG score recompute
  29. 2026-08-14 06:46 UTCGHSA enrichment
  30. 2026-08-13 22:00 UTCEPSS rescore
  31. 2026-08-13 18:03 UTCGHSA enrichment
  32. 2026-08-13 05:20 UTCGHSA enrichment
  33. 2026-08-12 16:36 UTCEG score recompute
  34. 2026-08-12 16:36 UTCGHSA enrichment
  35. 2026-08-12 13:51 UTCEPSS rescore
  36. 2026-08-12 03:51 UTCGHSA enrichment
  37. 2026-08-11 15:07 UTCEG score recompute
  38. 2026-08-11 15:07 UTCGHSA enrichment
  39. 2026-08-11 09:05 UTCEG score recompute
  40. 2026-08-11 09:04 UTCGHSA enrichment
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-10 20:22 UTCGHSA enrichment
  43. 2026-08-10 07:39 UTCGHSA enrichment
  44. 2026-08-09 18:56 UTCGHSA enrichment
  45. 2026-08-09 06:14 UTCGHSA enrichment
  46. 2026-08-08 17:31 UTCEG score recompute
  47. 2026-08-08 17:31 UTCGHSA enrichment
  48. 2026-08-08 16:37 UTCEPSS rescore
  49. 2026-08-08 04:48 UTCEG score recompute
  50. 2026-08-08 04:48 UTCGHSA enrichment
  51. 2026-08-07 16:05 UTCGHSA enrichment
  52. 2026-08-07 03:22 UTCGHSA enrichment
  53. 2026-08-06 14:39 UTCEG score recompute
  54. 2026-08-06 14:39 UTCGHSA enrichment
  55. 2026-08-06 13:47 UTCEPSS rescore
  56. 2026-08-06 01:56 UTCEG score recompute
  57. 2026-08-06 01:56 UTCGHSA enrichment
  58. 2026-08-05 19:17 UTCEPSS rescore
  59. 2026-08-05 19:17 UTCEPSS rescore
  60. 2026-08-05 13:14 UTCEG score recompute
  61. 2026-08-05 13:14 UTCGHSA enrichment
  62. 2026-08-05 05:37 UTCGHSA enrichment
  63. 2026-08-04 16:46 UTCEG score recompute
  64. 2026-08-04 16:46 UTCGHSA enrichment
  65. 2026-08-04 15:10 UTCEPSS rescore
  66. 2026-08-04 10:39 UTCEPSS rescore
  67. 2026-08-04 04:03 UTCGHSA enrichment
  68. 2026-08-03 15:21 UTCEG score recompute
  69. 2026-08-03 15:21 UTCGHSA enrichment
  70. 2026-08-03 10:36 UTCEPSS rescore
  71. 2026-08-03 02:38 UTCGHSA enrichment
  72. 2026-08-02 13:56 UTCEG score recompute
  73. 2026-08-02 13:56 UTCGHSA enrichment
  74. 2026-08-02 02:27 UTCEPSS rescore
  75. 2026-08-02 01:13 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-64354?
CVE-2026-64354 is a high vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: bpf: Validate BTF repeated field counts before expansion btfparsestructmetas() walks user-supplied BTF during BPFBTF_LOAD, and btfrepeatfields() expands repeatable fields from array elements into the fixed BTFFIELDSMAX scratch…
When was CVE-2026-64354 disclosed?
CVE-2026-64354 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64354 actively exploited?
CVE-2026-64354 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.2% of all scored CVEs.
What is the CVSS score of CVE-2026-64354?
CVE-2026-64354 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-64354?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64354, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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