CVE-2026-68198

Kernel memory corruption via asynchronous timer teardown

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in the Linux ath6kl Wi-Fi driver allows physically proximate attackers to corrupt kernel memory via crafted 802.11 frames. aggr_reset_state() deletes the aggregation timer asynchronously, so aggr_timeout() can re-arm the timer or access rx_tid[] and stat[] after aggr_module_destroy() frees their backing object. The ath6kl driver must be active on supported Qualcomm Atheros hardware; triggering the race exposes kernel data, corrupts memory, or panics the system.

CVSS severity8.8
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux ath6kl Wi-Fi driver allows physically proximate attackers to corrupt kernel memory via crafted 802.11 frames. aggr_reset_state() deletes the aggregation timer asynchronously, so aggr_timeout() can re-arm the timer or access rx_tid[] and stat[] after aggr_module_destroy() frees their backing object. The ath6kl driver must be active on supported Qualcomm Atheros hardware; triggering the race exposes kernel data, corrupts memory, or panics the system.

The record

CVE
CVE-2026-68198
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1203
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

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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=3.2
  2. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <18965470d41e69d3fc10eb62afae29d10f4cdfd1
  3. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <64af6534a085f49d6ed33338a19ab9cf0d0523c9
  4. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <a3313111b5d9046af60b370c93eec105b27380c1
  5. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <b5d618fd61b9069b4c0a6b487022dd3117ad5acc
  6. Affected versionversion=bdcd81707973cf8aa9305337166f8ee842a050d4 <ba7debb4dd6427386862220e8335a53a4bfc235d

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <18965470d41e69d3fc10eb62afae29d10f4cdfd1; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <64af6534a085f49d6ed33338a19ab9cf0d0523c9; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <a3313111b5d9046af60b370c93eec105b27380c1; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <b5d618fd61b9069b4c0a6b487022dd3117ad5acc; version=bdcd81707973cf8aa9305337166f8ee842a050d4 <ba7debb4dd6427386862220e8335a53a4bfc235d

Published CVSS scores

7.1Red HatCVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux Kernel CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5SUSECVSS: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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-825Expired Pointer Dereference
T1203Exploitation for Client Execution

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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