CVE-2026-68198
CVE-2026-68198: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
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Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.1
High [CVE-2026-68198] Linux kernel: Use-after-free in ath6kl Wi-Fi driver leading to denial of service
CVE-2026-68198Source published Source updated
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…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To mitigate this issue, prevent the `ath6kl` kernel module from loading. This can be achieved by creating a blacklist file. 1. Create a file named `/etc/modprobe.d/blacklist-ath6kl.conf` with the following content: ``` blacklist ath6kl install ath6kl /bin/true ``` 2. Regenerate the initramfs to ensure the blacklist is applied during boot: For RHEL 7: ```bash dracut -f -v ``` For RHEL 8 and 9: ```bash dracut -f --regenerate-all ``` 3. Reboot the system for the changes to take effect. This mitigation will disable functionality provided by the `ath6kl` driver, which may impact systems relying on specific Qualcomm Atheros wireless chipsets.
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