CVE-2025-21687

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-02-10. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 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

A fix is available — apply it.

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

vfio/platform: check the bounds of read/write syscalls

count and offset are passed from user space and not checked, only offset is capped to 40 bits, which can be used to read/write out of bounds of the device.

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
14%
KEV
Not listed

Published

February 10, 2025

Last Modified

July 30, 2026

Advisory Details (10)

Auto-updated Jul 30, 2026
No patch confirmed yet.
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ed81d82bb6e9df3a137f2c343ed689e6c68268ef
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d19a8650fd3d7aed8d1af1d9a77f979a8430eba1
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ce9ff21ea89d191e477a02ad7eabf4f996b80a69
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c981c32c38af80737a2fedc16e270546d139ccdd
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a20fcaa230f7472456d12cf761ed13938e320ac3
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9377cdc118cf327248f1a9dde7b87de067681dc9
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/92340e6c5122d823ad064984ef7513eba9204048
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6bcb8a5b70b80143db9bf12dfa7d53636f824d53
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/665cfd1083866f87301bbd232cb8ba48dcf4acce
generic

vfio/platform: check the bounds of read/write syscalls - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1485932496a1b025235af8aa1e21988d6b7ccd54

Vendor Advisories for CVE-2025-21687(1)

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

Patch Availability(23)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.135.133) @ jammy2026-05-30ubuntu
ubuntulinux-tools-kvm (5.15.0.1076.72) @ jammy2026-05-30ubuntu
ubuntulinux-tools-realtime (5.15.0.1080.83) @ jammy2026-05-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt (5.15.0.1033.33) @ jammy2026-05-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-host (5.15.0-1044.48) @ jammy2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.15.0.1079.69) @ jammy2026-05-30ubuntu
ubuntulinux-tools-oracle-edge (5.4.0.1140.149~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1145.87) @ focal2026-05-30ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.211.206) @ focal2026-05-30ubuntu
ubuntulinux-tools-fips (5.4.0.1116.113) @ focal2026-05-30ubuntu
ubuntulinux-tools-aws-fips (5.4.0.1142.89) @ focal2026-05-30ubuntu
ubuntulinux-tools-aws-lts-20.04 (5.4.0.1142.139) @ focal2026-05-30ubuntu
ubuntulinux-tools-aws-edge (5.4.0.1142.152~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.136.147~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-iot (5.4.0.1048.46) @ focal2026-05-30ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1077.83~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-azure-fde-edge (5.15.0.1086.95~20.04.1.61) @ focal2026-05-30ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1074.77~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-ibm-edge (5.4.0.1090.95~18.04.1) @ bionic2026-05-30ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1081.90~20.04.1) @ focal2026-05-30ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-05-30ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-05-30ubuntu
linuxKernel @ 5.4.290—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.

Weakness Classification(2)

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

Additional Vendor Advisories

(22)

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 9× in last 7d / 44× 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 106 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2025-21687?
CVE-2025-21687 is a high vulnerability published on February 10, 2025. In the Linux kernel, the following vulnerability has been resolved: vfio/platform: check the bounds of read/write syscalls count and offset are passed from user space and not checked, only offset is capped to 40 bits, which can be used to read/write out of bounds of the device.
When was CVE-2025-21687 disclosed?
CVE-2025-21687 was first published in the National Vulnerability Database on February 10, 2025, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21687 actively exploited?
CVE-2025-21687 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 86.2% of all scored CVEs.
What is the CVSS score of CVE-2025-21687?
CVE-2025-21687 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-21687?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-21687, 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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