CVE-2026-68353

Memory disclosure and crash via unchecked firmware count

Published Aug 10, 2026 · Updated Aug 10, 2026

Out-of-bounds read in the Linux ath6kl Wi-Fi driver allows attackers controlling device firmware to disclose kernel memory or crash. The ath6kl_wmi_tx_complete_event_rx() handler trusts the firmware-controlled num_msg count as its loop bound without confirming that the WMI event buffer contains every four-byte entry, reading as much as 1,020 bytes past the buffer. Exposure requires an AR600x-family device using ath6kl and firmware able to send an inflated completion count; systems without ath6kl hardware are unaffected.

CVSS severity8.1
High
EPSS probability0.29%
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 ath6kl Wi-Fi driver allows attackers controlling device firmware to disclose kernel memory or crash. The ath6kl_wmi_tx_complete_event_rx() handler trusts the firmware-controlled num_msg count as its loop bound without confirming that the WMI event buffer contains every four-byte entry, reading as much as 1,020 bytes past the buffer. Exposure requires an AR600x-family device using ath6kl and firmware able to send an inflated completion count; systems without ath6kl hardware are unaffected.

The record

CVE
CVE-2026-68353
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.2
  2. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <289edc3c71344b89e6522891147cfb8f61b088bb
  3. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495
  4. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <69ac7ba3a3df6654e7daa82674575a8c4a1a63ea
  5. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <c38b0d5c661951b5dd082bdf31f8a57a0ce6e540
  6. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <eb636fbc443149b3501c3f97e26225ddcb314a0f

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <289edc3c71344b89e6522891147cfb8f61b088bb; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <3a21c89215cc18f1a97c5e5bfd1da6d4f3d44495; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <69ac7ba3a3df6654e7daa82674575a8c4a1a63ea; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <c38b0d5c661951b5dd082bdf31f8a57a0ce6e540; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <eb636fbc443149b3501c3f97e26225ddcb314a0f

Published CVSS scores

8.1LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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.

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

No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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