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NVD / CVE Program· CNA Linux

CVE-2026-90373: wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear

—No exploit Fix available

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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 5dce25f1d609ba991a9c22c27be586c92f03ed77, 6.2, 6.7.

Low priority for now. Upgrade to Linux Linux 5dce25f1d609ba991a9c22c27be586c92f03ed77, 6.2, 6.7 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: wifi: mt76: mt7915: clear wcid mask under mutex after RCU pointer clear mt7915_remove_interface() cleared the wcid mask bit with no lock held and before clearing the RCU wcid pointer. The mask is a non-atomic RMW shared with the allocators, which all run under dev->mt76.mutex; on DBDC the two wiphys share one mt76_dev, so this raced add_interface/sta_add on the other band and could leak or double-hand-out a wcid. Clearing the bit before the RCU pointer also let a concurrent allocation reuse the index and publish its wcid, which the subsequent NULL assignment then wiped. Move the clear into the existing mutex section, after the RCU pointer is cleared.

Published
Sep 17, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 10th 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 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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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

    • b7c8e22dfddacc1b08dbf44f5be2c66305d757bc, a582b1d54313dcdc96e7d8e1f49495dd71ddaf3e, 6.12affected
    • f3049b88b2b32326df97461813ae73e8bbc296fc and later · before 5dce25f1d609ba991a9c22c27be586c92f03ed77affected · git
    • f3049b88b2b32326df97461813ae73e8bbc296fc and later · before b4a41a47a67c788e6b0625fa517ec8872e99bb6caffected · git
    • f3049b88b2b32326df97461813ae73e8bbc296fc and later · before a97b2b942d2f8f12fbd6a7caafc735d1ad115e6baffected · git
    • f3049b88b2b32326df97461813ae73e8bbc296fc and later · before 6486e11a6e2f679597af2d5bb48c3b07a2b2a7baaffected · git
    • 6.1.191 and later · before 6.2affected · semver
    • 6.6.160 and later · before 6.7affected · semver
    • before 6.12not affected · semver
    • 6.12.110 and later · up to and including 6.12.*not affected · semver
    • 6.18.52 and later · up to and including 6.18.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
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-2026-90371Sep 17, 2026 · wifi: mt76: fix RXDMAD_C buffer recycling race
    35Monitor
  • ← EarlierCVE-2026-90372Sep 17, 2026 · wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss
    28Monitor
  • Later →CVE-2026-90374Sep 17, 2026 · wifi: mt76: mt7996: validate RX band_idx before dereferencing phys[]
    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 Linux5dce25f1d609ba991a9c22c27be586c92f03ed77Vendor (CNA)
Linux Linux6.2Vendor (CNA)
Linux Linux6.7Vendor (CNA)
Linux Linux6486e11a6e2f679597af2d5bb48c3b07a2b2a7baVendor (CNA)
Linux Linuxa97b2b942d2f8f12fbd6a7caafc735d1ad115e6bVendor (CNA)
Linux Linuxb4a41a47a67c788e6b0625fa517ec8872e99bb6cVendor (CNA)
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).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

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.

References

Show all references (3 more)

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

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