CVE-2026-93121

HIGHPre-NVD 7.07.0—
EchelonGraph scoreHIGH confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-17. A secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths

The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffs_dmabuf_transfer() jump to err_fence_put which calls dma_fence_put() on the fence. However, at that point the fence has only been kmalloc'd — dma_fence_init() has not been called yet, so the refcount and the fence ops are uninitialized. Calling dma_fence_put() on such an object leads to undefined behavior.

Use kfree() instead, since the fence is just a plain allocation at this stage, and rename the label to err_fence_free to reflect the actual cleanup action.

CVSS v3
7.0
EG Score
7.0HIGHhigh confidence
EG Risk
36
EG Risk 36/100CISA SSVC

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
Severity70% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 17, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Sep 18, 2026
Patch available.
generic

usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/be539138d9a187af3b884525a395db10797c64f1
generic

usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/621707dc67c9846fd876d7579ec951d92aa033f1
generic

usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5fd8baacc7dc477df9cac61b45491840247a9b1e
generic

usb: gadget: f_fs: Fix fence cleanup in ffs_dmabuf_transfer() error paths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/58952c83dfe6ea3294a74734d2d1018c1120779a

Vendor Advisories for CVE-2026-93121(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 rangeFix by version rangeDependents
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 23× in last 7d / 69× 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.

  1. 2026-10-05 14:09 UTCGHSA enrichment
  2. 2026-10-05 01:04 UTCEG score recompute
  3. 2026-10-05 01:04 UTCGHSA enrichment
  4. 2026-10-04 23:22 UTCEPSS rescore
  5. 2026-10-04 11:58 UTCGHSA enrichment
  6. 2026-10-03 23:00 UTCEG score recompute
  7. 2026-10-03 23:00 UTCGHSA enrichment
  8. 2026-10-03 10:00 UTCGHSA enrichment
  9. 2026-10-02 20:47 UTCEG score recompute
  10. 2026-10-02 20:47 UTCGHSA enrichment
  11. 2026-10-02 07:49 UTCEG score recompute
  12. 2026-10-02 07:49 UTCGHSA enrichment
  13. 2026-10-01 19:51 UTCEPSS rescore
  14. 2026-10-01 18:51 UTCGHSA enrichment
  15. 2026-10-01 05:50 UTCGHSA enrichment
  16. 2026-09-30 16:52 UTCEG score recompute
  17. 2026-09-30 16:52 UTCGHSA enrichment
  18. 2026-09-30 15:04 UTCEPSS rescore
  19. 2026-09-30 03:10 UTCEG score recompute
  20. 2026-09-30 03:10 UTCGHSA enrichment
  21. 2026-09-29 14:12 UTCGHSA enrichment
  22. 2026-09-29 01:14 UTCEG score recompute
  23. 2026-09-29 01:14 UTCGHSA enrichment
  24. 2026-09-28 13:52 UTCEPSS rescore
  25. 2026-09-28 13:52 UTCEPSS rescore
Show 44 more
  1. 2026-09-28 12:16 UTCGHSA enrichment
  2. 2026-09-27 23:18 UTCEG score recompute
  3. 2026-09-27 23:18 UTCGHSA enrichment
  4. 2026-09-27 13:49 UTCEPSS rescore
  5. 2026-09-27 10:20 UTCGHSA enrichment
  6. 2026-09-26 21:21 UTCEG score recompute
  7. 2026-09-26 21:20 UTCGHSA enrichment
  8. 2026-09-26 15:59 UTCEPSS rescore
  9. 2026-09-26 08:21 UTCEG score recompute
  10. 2026-09-26 08:21 UTCGHSA enrichment
  11. 2026-09-25 19:19 UTCGHSA enrichment
  12. 2026-09-25 06:07 UTCGHSA enrichment
  13. 2026-09-24 17:08 UTCEG score recompute
  14. 2026-09-24 17:08 UTCGHSA enrichment
  15. 2026-09-24 14:04 UTCEPSS rescore
  16. 2026-09-24 04:10 UTCEG score recompute
  17. 2026-09-24 04:10 UTCGHSA enrichment
  18. 2026-09-23 17:54 UTCEPSS rescore
  19. 2026-09-23 15:12 UTCGHSA enrichment
  20. 2026-09-23 02:13 UTCEG score recompute
  21. 2026-09-23 02:13 UTCGHSA enrichment
  22. 2026-09-22 16:01 UTCEPSS rescore
  23. 2026-09-22 13:14 UTCGHSA enrichment
  24. 2026-09-22 00:17 UTCEG score recompute
  25. 2026-09-22 00:16 UTCGHSA enrichment
  26. 2026-09-21 21:09 UTCEPSS rescore
  27. 2026-09-21 11:18 UTCGHSA enrichment
  28. 2026-09-20 22:20 UTCEG score recompute
  29. 2026-09-20 22:20 UTCGHSA enrichment
  30. 2026-09-20 20:16 UTCEPSS rescore
  31. 2026-09-20 09:22 UTCGHSA enrichment
  32. 2026-09-19 20:23 UTCEG score recompute
  33. 2026-09-19 20:23 UTCGHSA enrichment
  34. 2026-09-19 07:24 UTCEG score recompute
  35. 2026-09-19 07:24 UTCGHSA enrichment
  36. 2026-09-18 19:28 UTCEPSS rescore
  37. 2026-09-18 18:26 UTCEG score recompute
  38. 2026-09-18 18:26 UTCGHSA enrichment
  39. 2026-09-18 18:00 UTCEG score recompute▲ 7.00
  40. 2026-09-18 18:00 UTCGHSA enrichment
  41. 2026-09-18 17:59 UTCMITRE cvelistV5CVSS v3 → 7 · severity → HIGH
  42. 2026-09-17 17:24 UTCNVD update
  43. 2026-09-17 16:21 UTCEG score recompute
  44. 2026-09-17 16:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-93121?
CVE-2026-93121 is a high vulnerability published on September 17, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: ffs: Fix fence cleanup in ffsdmabuf_transfer() error paths The error paths for endpoint-disabled (ESHUTDOWN) and request-allocation failure (ENOMEM) in ffsdmabuftransfer() jump to errfenceput which calls dmafenceput()…
When was CVE-2026-93121 disclosed?
CVE-2026-93121 was first published on September 17, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-93121 actively exploited?
CVE-2026-93121 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-2026-93121?
CVE-2026-93121 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-93121?
A fix for CVE-2026-93121 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-93121 are linked in the Vendor Advisories panel on this page.

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