CVE-2026-90044

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. 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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

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

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

usb: gadget: f_fs: Fix Use-After-Free in AIO error path

In ffs_epfile_write_iter() and ffs_epfile_read_iter(), when ffs_epfile_io() fails with an error other than -EIOCBQUEUED, the io_data structure (p) is freed. However, for AIO operations, the kiocb cancel function was already armed and kiocb->private was set to p.

If a concurrent cancel operation (such as sys_io_cancel()) executes after ffs_epfile_io() fails but before the function frees p, a Use-After-Free can occur when the cancellation handler accesses the freed pointer.

To securely fix this race condition, we must properly un-arm the cancellation. Invoking kiocb->ki_complete() does exactly this by acquiring ctx->ctx_lock and safely removing the kiocb from the active sequence. In doing so, it ensures that a parallel io_cancel can no longer discover the kiocb, effectively closing the race window.

We then return -EIOCBQUEUED to notify the VFS layer that the kiocb has been consumed and it should avoid attempting to complete the request again or triggering subsequent completion handlers.

CVSS v3
7.8
EG Score
7.8HIGHhigh confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

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 16, 2026

Last Modified

September 28, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

usb: gadget: f_fs: Fix Use-After-Free in AIO error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e78dcb1f7ec271449c54984dc90c62a5ba272de7
generic

usb: gadget: f_fs: Fix Use-After-Free in AIO error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4a2fb2d12b87b43724230abb52a1440617c7b6cc
generic

usb: gadget: f_fs: Fix Use-After-Free in AIO error path - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/153b5ecd29ed055562400bc17c91df3fd869b0ce

Vendor Advisories for CVE-2026-90044(1)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
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 28× in last 7d / 82× 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 07:46 UTCEG score recompute
  2. 2026-10-05 07:46 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 19:06 UTCGHSA enrichment
  5. 2026-10-04 06:17 UTCGHSA enrichment
  6. 2026-10-03 17:37 UTCEG score recompute
  7. 2026-10-03 17:37 UTCGHSA enrichment
  8. 2026-10-03 04:58 UTCEG score recompute
  9. 2026-10-03 04:58 UTCGHSA enrichment
  10. 2026-10-02 16:18 UTCGHSA enrichment
  11. 2026-10-02 16:17 UTCGHSA enrichment
  12. 2026-10-02 16:17 UTCGHSA enrichment
  13. 2026-10-02 03:36 UTCEG score recompute
  14. 2026-10-02 03:36 UTCGHSA enrichment
  15. 2026-10-01 19:51 UTCEPSS rescore
  16. 2026-10-01 14:56 UTCGHSA enrichment
  17. 2026-10-01 02:16 UTCEG score recompute
  18. 2026-10-01 02:16 UTCGHSA enrichment
  19. 2026-09-30 15:04 UTCEPSS rescore
  20. 2026-09-30 13:37 UTCGHSA enrichment
  21. 2026-09-30 00:53 UTCEG score recompute
  22. 2026-09-30 00:53 UTCGHSA enrichment
  23. 2026-09-29 12:00 UTCGHSA enrichment
  24. 2026-09-28 23:15 UTCEG score recompute
  25. 2026-09-28 23:15 UTCGHSA enrichment
Show 57 more
  1. 2026-09-28 13:52 UTCEPSS rescore
  2. 2026-09-28 13:52 UTCEPSS rescore
  3. 2026-09-28 12:08 UTCGHSA enrichment
  4. 2026-09-27 23:28 UTCEG score recompute
  5. 2026-09-27 23:28 UTCGHSA enrichment
  6. 2026-09-27 13:49 UTCEPSS rescore
  7. 2026-09-27 10:47 UTCGHSA enrichment
  8. 2026-09-26 21:50 UTCEG score recompute
  9. 2026-09-26 21:50 UTCGHSA enrichment
  10. 2026-09-26 15:59 UTCEPSS rescore
  11. 2026-09-26 09:11 UTCEG score recompute
  12. 2026-09-26 09:11 UTCGHSA enrichment
  13. 2026-09-25 20:29 UTCGHSA enrichment
  14. 2026-09-25 07:01 UTCGHSA enrichment
  15. 2026-09-24 18:21 UTCEG score recompute
  16. 2026-09-24 18:21 UTCGHSA enrichment
  17. 2026-09-24 14:04 UTCEPSS rescore
  18. 2026-09-24 05:41 UTCEG score recompute
  19. 2026-09-24 05:41 UTCGHSA enrichment
  20. 2026-09-23 17:54 UTCEPSS rescore
  21. 2026-09-23 17:01 UTCGHSA enrichment
  22. 2026-09-23 04:21 UTCEG score recompute
  23. 2026-09-23 04:21 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 15:40 UTCGHSA enrichment
  26. 2026-09-22 03:00 UTCEG score recompute
  27. 2026-09-22 03:00 UTCGHSA enrichment
  28. 2026-09-21 21:09 UTCEPSS rescore
  29. 2026-09-21 14:20 UTCEG score recompute
  30. 2026-09-21 14:20 UTCGHSA enrichment
  31. 2026-09-21 13:20 UTCEG score recompute
  32. 2026-09-21 13:20 UTCGHSA enrichment
  33. 2026-09-21 10:59 UTCGHSA enrichment
  34. 2026-09-20 22:20 UTCEG score recompute
  35. 2026-09-20 22:20 UTCGHSA enrichment
  36. 2026-09-20 20:16 UTCEPSS rescore
  37. 2026-09-20 09:39 UTCGHSA enrichment
  38. 2026-09-19 20:59 UTCEG score recompute
  39. 2026-09-19 20:59 UTCGHSA enrichment
  40. 2026-09-19 08:19 UTCGHSA enrichment
  41. 2026-09-18 19:39 UTCEG score recompute
  42. 2026-09-18 19:39 UTCGHSA enrichment
  43. 2026-09-18 19:28 UTCEPSS rescore
  44. 2026-09-18 06:59 UTCEG score recompute
  45. 2026-09-18 06:59 UTCGHSA enrichment
  46. 2026-09-17 19:32 UTCEPSS rescore
  47. 2026-09-17 18:19 UTCGHSA enrichment
  48. 2026-09-17 04:01 UTCEG score recompute
  49. 2026-09-17 04:01 UTCGHSA enrichment
  50. 2026-09-16 15:21 UTCEG score recompute
  51. 2026-09-16 15:21 UTCGHSA enrichment
  52. 2026-09-16 14:46 UTCEG score recompute▲ 7.80
  53. 2026-09-16 14:46 UTCGHSA enrichment
  54. 2026-09-16 14:45 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  55. 2026-09-16 11:21 UTCNVD update
  56. 2026-09-16 10:36 UTCEG score recompute
  57. 2026-09-16 10:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90044?
CVE-2026-90044 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_fs: Fix Use-After-Free in AIO error path In ffsepfilewriteiter() and ffsepfilereaditer(), when ffsepfileio() fails with an error other than -EIOCBQUEUED, the io_data structure (p) is freed. However, for AIO…
When was CVE-2026-90044 disclosed?
CVE-2026-90044 was first published on September 16, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90044 actively exploited?
CVE-2026-90044 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-90044?
CVE-2026-90044 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-90044?
No fix for CVE-2026-90044 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-90044 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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