CVE-2026-31720

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

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

usb: gadget: f_uac1_legacy: validate control request size

f_audio_complete() copies req->length bytes into a 4-byte stack variable:

u32 data = 0; memcpy(&data, req->buf, req->length);

req->length is derived from the host-controlled USB request path, which can lead to a stack out-of-bounds write.

Validate req->actual against the expected payload size for the supported control selectors and decode only the expected amount of data.

This avoids copying a host-influenced length into a fixed-size stack object.

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

May 1, 2026

Last Modified

May 6, 2026

Advisory Details (8)

Auto-updated May 6, 2026
No patch confirmed yet.
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c6da4fed7537aec19880c24f6c3a95065adb1406
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/be2d32f0c3fe333d14c0a9ca90328dacbc3e06b8
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8e5eb1d6e6a3d7bbea9c92132d0cda5793176426
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6e0e34d85cd46ceb37d16054e97a373a32770f6c
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/557d1d4e862eccd0b74cc377b66de3e1e8d49605
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/26304d124e7f0383f8fe1168b5801a0ac7e16b1c
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/21b11e8581285c6f10ef43d05df349d445f24273
generic

usb: gadget: f_uac1_legacy: validate control request size - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0d41772d98dcaf6c17e875b7d0ea0154ae1191ee

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.253—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (53 versions)5.10.257-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (125 versions)6.19.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(24)

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 / 28× 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 236 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31720?
CVE-2026-31720 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: fuac1legacy: validate control request size faudiocomplete() copies req->length bytes into a 4-byte stack variable: u32 data = 0; memcpy(&data, req->buf, req->length); req->length is derived from the host-controlled USB…
When was CVE-2026-31720 disclosed?
CVE-2026-31720 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31720 actively exploited?
CVE-2026-31720 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 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-31720?
CVE-2026-31720 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31720?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31720, 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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