UnratedFix available
mmc: sdio_uart: fix xmit_fifo leak when the port table is full
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: mmc: sdio_uart: fix xmit_fifo leak when the port table is full sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error.
- 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-2026-98208
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 16:21 UTC · Revision 1
Source evidence
mmc: sdio_uart: fix xmit_fifo leak when the port table is full
core-osv · Original sourcePublished 6 Oct 2026, 08:44 UTC
In the Linux kernel, the following vulnerability has been resolved: mmc: sdio_uart: fix xmit_fifo leak when the port table is full sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error.
osv:CVE-2026-98208
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
{
"id": "279d48dcde83d22ddc4c879f25fa50359200114b24cacb1c894a6a48f5403680",
"url": "https://osv.dev/vulnerability/CVE-2026-98208",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "mmc: sdio_uart: fix xmit_fifo leak when the port table is full",
"summary": "In the Linux kernel, the following vulnerability has been resolved: mmc: sdio_uart: fix xmit_fifo leak when the port table is full sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error.",
"evidence": "osv:CVE-2026-98208",
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"modified": "2026-10-28T02:30:44.216122046Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-98208",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"provider_metadata": {
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"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98208.json"
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"related_cves": [
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"evidence": "/id"
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"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 512386,
"published_at": "2026-10-06T08:44:45.098+00:00"
}