wifi: libertas_tf: fix UAF in lbtf_free_adapter()
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas_tf: fix UAF in lbtf_free_adapter() lbtf_free_adapter() calls lbtf_free_cmd_buffer() to free the command buffers before calling timer_delete_sync() to wait for the command timer callback. If the timer callback (command_timer_fn) is already running when lbtf_free_cmd_buffer() frees the command array, the callback dereferences priv->cur_cmd->cmdbuf which points to freed memory. Swap the order so that timer_delete_sync() runs first, ensuring any in-flight callback has completed before the command buffers are freed.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.271, 5.15.222, 6.1.189, 6.12.112, 6.18.54, 6.6.158, 7.2.8
- CVEs
- CVE-2026-98194
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 04:44 UTC · Revision 1
Source evidence
wifi: libertas_tf: fix UAF in lbtf_free_adapter()
core-osv · Original sourcePublished 6 Oct 2026, 08:44 UTC
In the Linux kernel, the following vulnerability has been resolved: wifi: libertas_tf: fix UAF in lbtf_free_adapter() lbtf_free_adapter() calls lbtf_free_cmd_buffer() to free the command buffers before calling timer_delete_sync() to wait for the command timer callback. If the timer callback (command_timer_fn) is already running when lbtf_free_cmd_buffer() frees the command array, the callback dereferences priv->cur_cmd->cmdbuf which points to freed memory. Swap the order so that timer_delete_sync() runs first, ensuring any in-flight callback has completed before the command buffers are freed.
osv:CVE-2026-98194
Kernel
Fixed versions: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.112, 6.18.54, 7.2.8
Complete source record
{
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"url": "https://osv.dev/vulnerability/CVE-2026-98194",
"method": "structured",
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"title": "wifi: libertas_tf: fix UAF in lbtf_free_adapter()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: libertas_tf: fix UAF in lbtf_free_adapter() lbtf_free_adapter() calls lbtf_free_cmd_buffer() to free the command buffers before calling timer_delete_sync() to wait for the command timer callback. If the timer callback (command_timer_fn) is already running when lbtf_free_cmd_buffer() frees the command array, the callback dereferences priv->cur_cmd->cmdbuf which points to freed memory. Swap the order so that timer_delete_sync() runs first, ensuring any in-flight callback has completed before the command buffers are freed.",
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"modified": "2026-10-28T02:30:25.878288946Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-98194",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 492567,
"published_at": "2026-10-06T08:44:34.253+00:00"
}