CVE-2026-23315

Kernel memory disclosure via unchecked frame length

Published Mar 25, 2026 · Updated Mar 25, 2026

Out-of-bounds read in the Linux kernel mt76 Wi-Fi driver allows local users to disclose kernel memory or interrupt service. mt76_connac2_mac_write_txwi_80211 reads category, action-code, and capability fields from an outgoing Block Ack action frame without first verifying that the skb contains those fields. Exploitation requires low-privileged local access and an affected mt76 transmit path; the published consequences are bounded to memory disclosure and a kernel crash.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux kernel mt76 Wi-Fi driver allows local users to disclose kernel memory or interrupt service. mt76_connac2_mac_write_txwi_80211 reads category, action-code, and capability fields from an outgoing Block Ack action frame without first verifying that the skb contains those fields. Exploitation requires low-privileged local access and an affected mt76 transmit path; the published consequences are bounded to memory disclosure and a kernel crash.

The record

CVE
CVE-2026-23315
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.10
  2. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <0fb3b94a9431a3800717e5c3b6fa2e1045a15029
  3. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <4e10a730d1b511ff49723371ed6d694dd1b2c785
  4. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <7ae7b093b7dba9548a3bc4766b9364b97db4732d
  5. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <7b692dff8df0ba5feb8df00f27d906d6eb1fe627
  6. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <84419556359bc96d3fe1623d47a64c86542566cc
  7. Affected versionversion=577dbc6c656da6997dddc6cf842b7954588f2d4e <9612d91f617231e03c49cb9b0c02f975a3b4f51f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.10; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <0fb3b94a9431a3800717e5c3b6fa2e1045a15029; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <4e10a730d1b511ff49723371ed6d694dd1b2c785; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <7ae7b093b7dba9548a3bc4766b9364b97db4732d; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <7b692dff8df0ba5feb8df00f27d906d6eb1fe627; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <84419556359bc96d3fe1623d47a64c86542566cc; version=577dbc6c656da6997dddc6cf842b7954588f2d4e <9612d91f617231e03c49cb9b0c02f975a3b4f51f

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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