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NVD / CVE Program· CNA Linux

CVE-2026-93214: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 3639438a4c83ffc2e564c8c010b92137c5d11cfa, 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9, 78a14ea2284825055ab6c2a1f3489510f560f3a2; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 3639438a4c83ffc2e564c8c010b92137c5d11cfa, 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9, 78a14ea2284825055ab6c2a1f3489510f560f3a2; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: fix deadlock in usbg_make_tpg() usbg_make_tpg() held dep_lock while calling configfs_depend_item_unlocked(), which acquires the configfs root inode lock when operating across subsystems. This creates a circular lock dependency with configfs_rmdir(): dep_lock -> configfs root inode lock -> su_mutex -> dep_lock In usbg_make_tpg(), dep_lock only serialized the read of opts->ready, which is a monotonic flag that transitions from false to true exactly once (in tcm_set_name()) and never reverts. Remove dep_lock from usbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access opts->ready locklessly instead.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.5affected
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before 3639438a4c83ffc2e564c8c010b92137c5d11cfaaffected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before 78a14ea2284825055ab6c2a1f3489510f560f3a2affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before eef3e62f90d86c1c5651742f84ecc9db1814a893affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before f81a2da137b029a282b9bc64d2f267d242948659affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before 6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before d90b0f90e30cd59b36005a4016b15cf02bcd7fb2affected · git
    • 4bb8548df632187d5db50878e71804af5f7c51ad and later · before 9dbf74f4022f80f7669d2b3c22c5deb46c1b5674affected · git
    • before 4.5not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-93212Sep 24, 2026 · nfsd: guard nfsd_serv deref in nfsd_file_net_dispose
    0Monitor
  • ← EarlierCVE-2026-93213Sep 24, 2026 · of: fix out-of-bounds read in of_alias_scan() stem parser
    0Monitor
  • Later →CVE-2026-93215Sep 24, 2026 · cdx: Fix double free when sysfs file creation fails
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3639438a4c83ffc2e564c8c010b92137c5d11cfaVendor (CNA)
Linux Linux6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9Vendor (CNA)
Linux Linux78a14ea2284825055ab6c2a1f3489510f560f3a2Vendor (CNA)
Linux Linux9dbf74f4022f80f7669d2b3c22c5deb46c1b5674Vendor (CNA)
Linux Linuxabad5daa41cf5d0a0a9cba0397d3a0e7f11e0277Vendor (CNA)
Linux Linuxd90b0f90e30cd59b36005a4016b15cf02bcd7fb2Vendor (CNA)
Linux Linuxeef3e62f90d86c1c5651742f84ecc9db1814a893Vendor (CNA)
Linux Linuxf81a2da137b029a282b9bc64d2f267d242948659Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records