CVE-2026-68309

Local system crash via unchecked HE capability pointer

Published Aug 10, 2026 · Updated Aug 10, 2026

NULL-pointer dereference in the Linux kernel mt76 connac Wi-Fi driver allows local users to crash systems with affected MediaTek Wi-Fi. mt76_connac_mcu_uni_bss_he_tlv dereferences a capability pointer returned by mt76_connac_get_he_phy_cap without checking whether it is NULL. The path is limited to systems using affected MediaTek mt76 connac hardware, and triggering it interrupts availability by crashing the system.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL-pointer dereference in the Linux kernel mt76 connac Wi-Fi driver allows local users to crash systems with affected MediaTek Wi-Fi. mt76_connac_mcu_uni_bss_he_tlv dereferences a capability pointer returned by mt76_connac_get_he_phy_cap without checking whether it is NULL. The path is limited to systems using affected MediaTek mt76 connac hardware, and triggering it interrupts availability by crashing the system.

The record

CVE
CVE-2026-68309
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=5.12
  2. Affected versionversion=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <2afc2d5098866518a5c446a2e647b1b3f43daaf4
  3. Affected versionversion=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <2c1fb2335f5e3afb34f91bc07ecb63517c328090
  4. Affected versionversion=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <8709c66e665a2a09192853d4f3d0fb4bd0f76403
  5. Affected versionversion=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <b09508dd7bc4a8948ea00603041a918c09788502
  6. Affected versionversion=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <c058786b09cfab080125bc3ee7928a181dcbd37a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <2afc2d5098866518a5c446a2e647b1b3f43daaf4; version=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <2c1fb2335f5e3afb34f91bc07ecb63517c328090; version=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <8709c66e665a2a09192853d4f3d0fb4bd0f76403; version=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <b09508dd7bc4a8948ea00603041a918c09788502; version=d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 <c058786b09cfab080125bc3ee7928a181dcbd37a

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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