CVE-2026-68198
wifi: ath6kl: fix use-after-free in aggr_reset_state()
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix use-after-free in aggr_reset_state() The aggr_reset_state() function uses timer_delete() (non-synchronous) for the aggregation timer before proceeding to delete TID state and before the structure is freed by callers like aggr_module_destroy(). If the timer callback (aggr_timeout) is executing when aggr_reset_state() is called, the callback will continue to access aggr_conn fields like rx_tid[] and stat[] which may be freed immediately after by kfree(aggr_info->aggr_conn) in aggr_module_destroy(). Additionally, the timer callback can re-arm itself via mod_timer() while aggr_reset_state() is running, creating a more complex race condition. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning.
INFO
Published Date :
Aug. 10, 2026, 1:20 p.m.
Last Modified :
Aug. 17, 2026, 5:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Use timer_delete_sync() instead of timer_delete().
- Ensure timer callbacks complete before freeing memory.
- Update the Linux kernel to the resolved version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-68198.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-68198 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-68198
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-68198 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-68198 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '64af6534a085f49d6ed33338a19ab9cf0d0523c9', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'b5d618fd61b9069b4c0a6b487022dd3117ad5acc', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '18965470d41e69d3fc10eb62afae29d10f4cdfd1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'a3313111b5d9046af60b370c93eec105b27380c1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'ba7debb4dd6427386862220e8335a53a4bfc235d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '64af6534a085f49d6ed33338a19ab9cf0d0523c9', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'b5d618fd61b9069b4c0a6b487022dd3117ad5acc', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '18965470d41e69d3fc10eb62afae29d10f4cdfd1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'a3313111b5d9046af60b370c93eec105b27380c1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'ba7debb4dd6427386862220e8335a53a4bfc235d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 10, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '64af6534a085f49d6ed33338a19ab9cf0d0523c9', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'b5d618fd61b9069b4c0a6b487022dd3117ad5acc', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': '18965470d41e69d3fc10eb62afae29d10f4cdfd1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'a3313111b5d9046af60b370c93eec105b27380c1', 'versionType': 'git'}, {'status': 'affected', 'version': 'bdcd81707973cf8aa9305337166f8ee842a050d4', 'lessThan': 'ba7debb4dd6427386862220e8335a53a4bfc235d', 'versionType': 'git'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/net/wireless/ath/ath6kl/txrx.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix use-after-free in aggr_reset_state() The aggr_reset_state() function uses timer_delete() (non-synchronous) for the aggregation timer before proceeding to delete TID state and before the structure is freed by callers like aggr_module_destroy(). If the timer callback (aggr_timeout) is executing when aggr_reset_state() is called, the callback will continue to access aggr_conn fields like rx_tid[] and stat[] which may be freed immediately after by kfree(aggr_info->aggr_conn) in aggr_module_destroy(). Additionally, the timer callback can re-arm itself via mod_timer() while aggr_reset_state() is running, creating a more complex race condition. Use timer_delete_sync() instead to ensure any running timer callback has completed before returning. Added Reference https://git.kernel.org/stable/c/18965470d41e69d3fc10eb62afae29d10f4cdfd1 Added Reference https://git.kernel.org/stable/c/64af6534a085f49d6ed33338a19ab9cf0d0523c9 Added Reference https://git.kernel.org/stable/c/a3313111b5d9046af60b370c93eec105b27380c1 Added Reference https://git.kernel.org/stable/c/b5d618fd61b9069b4c0a6b487022dd3117ad5acc Added Reference https://git.kernel.org/stable/c/ba7debb4dd6427386862220e8335a53a4bfc235d