Vulnerability in Linux

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/53823e25793a97d07e6e98e0904bbf74cac8bc76
• git.kernel.org/stable/c/5e142adbbdc54afbd01fad476c91cded41d22594
• git.kernel.org/stable/c/72f4c2b7a48423c708f2c348585419a1b71ab04c
• git.kernel.org/stable/c/8a2c1bf209ba04cbd14153a771724bd5aa522fcd
• git.kernel.org/stable/c/9e992d59138fcfaa4bad7cc0750265b0a8bca100
• git.kernel.org/stable/c/ac866db277a4c73e84b4263773652e3aba326249
• git.kernel.org/stable/c/b97b5b66c93cb4aaf6358727a73fff880a774dfd
• git.kernel.org/stable/c/fd8223c53ad9553b2a349d2a40e19bbc6e60fc48