CVE-2026-98208
mmc: sdio_uart: fix xmit_fifo leak when the port table is full
Description
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.
INFO
Published Date :
Oct. 6, 2026, 9:18 a.m.
Last Modified :
Oct. 19, 2026, 10:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Free the transmit FIFO in sdio_uart_add_port error path.
- Ensure all allocated resources are released on error.
References to Advisories, Solutions, and Tools
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information, practical solutions, and valuable tools related to
CVE-2026-98208.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-98208 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-2026-98208
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).
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The following list is the news that have been mention
CVE-2026-98208 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-98208 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.
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CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 19, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98208.json">CVE-2026-98208</a> -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 06, 2026
Action Type Old Value New Value Added Description 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98208.json">CVE-2026-98208</a> Added Reference https://git.kernel.org/stable/c/53823e25793a97d07e6e98e0904bbf74cac8bc76 Added Reference https://git.kernel.org/stable/c/5e142adbbdc54afbd01fad476c91cded41d22594 Added Reference https://git.kernel.org/stable/c/72f4c2b7a48423c708f2c348585419a1b71ab04c Added Reference https://git.kernel.org/stable/c/8a2c1bf209ba04cbd14153a771724bd5aa522fcd Added Reference https://git.kernel.org/stable/c/9e992d59138fcfaa4bad7cc0750265b0a8bca100 Added Reference https://git.kernel.org/stable/c/ac866db277a4c73e84b4263773652e3aba326249 Added Reference https://git.kernel.org/stable/c/b97b5b66c93cb4aaf6358727a73fff880a774dfd Added Reference https://git.kernel.org/stable/c/fd8223c53ad9553b2a349d2a40e19bbc6e60fc48