CVE-2025-38586

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2025-08-19. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

bpf, arm64: Fix fp initialization for exception boundary

In the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPF program, find_used_callee_regs() is not called because for a program acting as exception boundary, all callee saved registers are saved. find_used_callee_regs() sets ctx->fp_used = true; when it sees FP being used in any of the instructions.

For programs acting as exception boundary, ctx->fp_used remains false even if frame pointer is used by the program and therefore, FP is not set-up for such programs in the prologue. This can cause the kernel to crash due to a pagefault.

Fix it by setting ctx->fp_used = true for exception boundary programs as fp is always saved in such programs.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 19, 2025

Last Modified

August 5, 2026

Advisory Details (4)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

bpf, arm64: Fix fp initialization for exception boundary - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422
generic

bpf, arm64: Fix fp initialization for exception boundary - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35
generic

bpf, arm64: Fix fp initialization for exception boundary - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adce
generic

bpf, arm64: Fix fp initialization for exception boundary - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-6.14 (6.14.0-1016.16) @ noble2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (6.14.0-1017.17~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-raspi-6.14 (6.14.0-1018.18) @ plucky2026-05-30ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.14.0-1016.16~24.04.1) @ noble2026-05-30ubuntu
ubuntulinux-tools-azure-6.14 (6.14.0-1017.17) @ plucky2026-05-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.14.0-36.36) @ plucky2026-05-30ubuntu
linuxKernel @ 6.12.42—osv

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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1, 6.12.41-1, 6.12.43-1~bpo12+16.12.43-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.16~rc7-1~exp1 (62 versions)6.16.3-1—

Weakness Classification(1)

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

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 22× 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 144 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2025-38586?
CVE-2025-38586 is a medium vulnerability published on August 19, 2025. In the Linux kernel, the following vulnerability has been resolved: bpf, arm64: Fix fp initialization for exception boundary In the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPF program, findusedcallee_regs() is not called because for a program acting as exception boundary, all…
When was CVE-2025-38586 disclosed?
CVE-2025-38586 was first published in the National Vulnerability Database on August 19, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-38586 actively exploited?
CVE-2025-38586 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 93.6% of all scored CVEs.
What is the CVSS score of CVE-2025-38586?
CVE-2025-38586 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-38586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-38586, 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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