CVE-2026-89739

UNRATEDCVSS · not yet scoredTrending — 3 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

usb: dwc3: gadget: Fix use-after-free in dwc3_gadget_free_endpoints due to race condition

In dwc3_gadget_init_endpoint, &dep->nostream_work is bound with dwc3_nostream_work, and dwc3_gadget_endpoint_stream_event can queue this delayed work on system_percpu_wq when a DEPEVT_STREAM_NOSTREAM event is received.

If we remove the gadget, dwc3_gadget_free_endpoints makes cleanup and the memory allocated for dep with kzalloc() is released by kfree(dep), while the delayed work mentioned above may still be pending or running. The sequence of operations that may lead to a UAF bug is as follows:

CPU0 CPU1

| dwc3_thread_interrupt | dwc3_endpoint_interrupt | dwc3_gadget_endpoint_stream_event | queue_delayed_work(system_percpu_wq, | &dep->nostream_work) dwc3_gadget_free_endpoints | dwc3_free_trb_pool(dep) | list_del(&dep->endpoint.ep_list) | dwc3_debugfs_remove_endpoint_dir(dep) | kfree(dep) | // dep is freed | | dwc3_nostream_work | // use dep (use-after-free)

Fix it by canceling the delayed work before kfree(dep) in dwc3_gadget_free_endpoints.

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 11, 2026

Last Modified

October 3, 2026

References (4)

Vendor Advisories for CVE-2026-89739(1)

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

Affected Packages

(1 across 1 ecosystem)
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
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Data Freshness Timeline

(refreshed 12× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 49 is merged into the row it repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-12 14:48 UTCEG score recompute
  4. 2026-10-11 19:15 UTCEG score recompute
  5. 2026-10-11 16:31 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-10-11 13:47 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-10-09 16:27 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  11. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-10-06 12:14 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  15. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-03 11:34 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  18. 2026-10-03 11:26 UTCNVD update
  19. 2026-10-03 11:10 UTCMITRE cvelistV5
  20. 2026-10-03 02:26 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  21. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-30 01:40 UTCEG score recompute
  24. 2026-09-30 01:40 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  25. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 9th percentile
Show 23 more
  1. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-09-27 00:03 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  5. 2026-09-23 23:23 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  6. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  8. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  9. 2026-09-20 22:40 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-09-17 22:00 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  13. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  14. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  15. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  17. 2026-09-14 21:19 UTCEG score recompute
  18. 2026-09-14 21:19 UTCGHSA enrichmentGHSA-5q8g-48x9-ppw2
  19. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  20. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  21. 2026-09-11 20:36 UTCNVD update
  22. 2026-09-11 19:54 UTCEG score recompute
  23. 2026-09-11 19:53 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-89739?
CVE-2026-89739 is a vulnerability whose severity is not yet rated; its CVE record was published on September 11, 2026. In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: Fix use-after-free in dwc3gadgetfree_endpoints due to race condition In dwc3gadgetinitendpoint, &dep->nostreamwork is bound with dwc3nostreamwork, and dwc3gadgetendpointstreamevent can queue this delayed work on…
When was the CVE record for CVE-2026-89739 published?
The CVE record for CVE-2026-89739 was published on September 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 3, 2026; the record at its source may have been updated since.
Is CVE-2026-89739 actively exploited?
CVE-2026-89739 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-89739?
A fix for CVE-2026-89739 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-89739 are linked in the Vendor Advisories panel on this page.

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