CVE-2026-98312Hinoki check available

Kernel crash via unchecked USB packet length

Published Oct 6, 2026 · Updated Oct 6, 2026

Out-of-bounds write in the Linux ALSA 6fire driver allows physically proximate attackers to crash a host via malformed USB audio packets. In usb6fire_pcm_in_urb_handler(), subtraction from a device-reported length below four bytes wraps, while larger packets can also make the calculated output exceed its allocated buffer. The driver must process 6fire audio traffic; the published crash trace demonstrates a kernel panic, not a separately established code-execution outcome.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds write in the Linux ALSA 6fire driver allows physically proximate attackers to crash a host via malformed USB audio packets. In usb6fire_pcm_in_urb_handler(), subtraction from a device-reported length below four bytes wraps, while larger packets can also make the calculated output exceed its allocated buffer. The driver must process 6fire audio traffic; the published crash trace demonstrates a kernel panic, not a separately established code-execution outcome.

The record

CVE
CVE-2026-98312
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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=2.6.39
  2. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <001ba7c1d9677225a5ecbc3e60d4865c08bb21d8
  3. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <1589afe2d099d3e817873bc474676968d7080410
  4. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <246de677552fe5dede293a1543b632e9853f31e4
  5. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <61e665fb48e9eee44ec6d610514af383b1802cc1
  6. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <cdc31537012bc7a58c95c6750db321b69dd802bb
  7. Affected versionversion=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <ea11ade10583cc45af515d6b24510dbfa0184ca6

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.39; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <001ba7c1d9677225a5ecbc3e60d4865c08bb21d8; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <1589afe2d099d3e817873bc474676968d7080410; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <246de677552fe5dede293a1543b632e9853f31e4; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <61e665fb48e9eee44ec6d610514af383b1802cc1; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <cdc31537012bc7a58c95c6750db321b69dd802bb; version=c6d43ba816d1cf1d125bfbfc938f2a28a87facf9 <ea11ade10583cc45af515d6b24510dbfa0184ca6

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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