{"id":"CVE-2026-98208","state":"PUBLISHED","title":"mmc: sdio_uart: fix xmit_fifo leak when the port table is full","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdio_uart: fix xmit_fifo leak when the port table is full\n\nsdio_uart_add_port() allocates the transmit fifo before claiming a\nslot in sdio_uart_table[].  When all UART_NR slots are taken, it\nreturns -EBUSY with the fifo still allocated, but the probe error\npath only kfree()s the port, leaking the transmit fifo.\n\nFree the fifo in the failure path of sdio_uart_add_port() itself so\nthe function retains nothing on error.","publishedAt":"2026-10-06T08:44:45.098Z","updatedAt":"2026-10-19T09:15:39.242Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"9e992d59138fcfaa4bad7cc0750265b0a8bca100","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"b97b5b66c93cb4aaf6358727a73fff880a774dfd","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"8a2c1bf209ba04cbd14153a771724bd5aa522fcd","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"72f4c2b7a48423c708f2c348585419a1b71ab04c","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"fd8223c53ad9553b2a349d2a40e19bbc6e60fc48","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"ac866db277a4c73e84b4263773652e3aba326249","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"5e142adbbdc54afbd01fad476c91cded41d22594","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"53823e25793a97d07e6e98e0904bbf74cac8bc76","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/core/sdio_uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/core/sdio_uart.c"]}],"references":["https://git.kernel.org/stable/c/9e992d59138fcfaa4bad7cc0750265b0a8bca100","https://git.kernel.org/stable/c/b97b5b66c93cb4aaf6358727a73fff880a774dfd","https://git.kernel.org/stable/c/8a2c1bf209ba04cbd14153a771724bd5aa522fcd","https://git.kernel.org/stable/c/72f4c2b7a48423c708f2c348585419a1b71ab04c","https://git.kernel.org/stable/c/fd8223c53ad9553b2a349d2a40e19bbc6e60fc48","https://git.kernel.org/stable/c/ac866db277a4c73e84b4263773652e3aba326249","https://git.kernel.org/stable/c/5e142adbbdc54afbd01fad476c91cded41d22594","https://git.kernel.org/stable/c/53823e25793a97d07e6e98e0904bbf74cac8bc76"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98208.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98208","state":"PUBLISHED","datePublished":"2026-10-06T08:44:45.098Z","dateUpdated":"2026-10-19T09:15:39.242Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.325Z"},"containers":{"cna":{"title":"mmc: sdio_uart: fix xmit_fifo leak when the port table is full","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: sdio_uart: fix xmit_fifo leak when the port table is full\n\nsdio_uart_add_port() allocates the transmit fifo before claiming a\nslot in sdio_uart_table[].  When all UART_NR slots are taken, it\nreturns -EBUSY with the fifo still allocated, but the probe error\npath only kfree()s the port, leaking the transmit fifo.\n\nFree the fifo in the failure path of sdio_uart_add_port() itself so\nthe function retains nothing on error."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"9e992d59138fcfaa4bad7cc0750265b0a8bca100","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"b97b5b66c93cb4aaf6358727a73fff880a774dfd","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"8a2c1bf209ba04cbd14153a771724bd5aa522fcd","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"72f4c2b7a48423c708f2c348585419a1b71ab04c","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"fd8223c53ad9553b2a349d2a40e19bbc6e60fc48","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"ac866db277a4c73e84b4263773652e3aba326249","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"5e142adbbdc54afbd01fad476c91cded41d22594","versionType":"git"},{"version":"8b197a5ce7a7218bb9fc721647ba0d5734f27348","status":"affected","lessThan":"53823e25793a97d07e6e98e0904bbf74cac8bc76","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/core/sdio_uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.34","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.34","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/core/sdio_uart.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9e992d59138fcfaa4bad7cc0750265b0a8bca100"},{"url":"https://git.kernel.org/stable/c/b97b5b66c93cb4aaf6358727a73fff880a774dfd"},{"url":"https://git.kernel.org/stable/c/8a2c1bf209ba04cbd14153a771724bd5aa522fcd"},{"url":"https://git.kernel.org/stable/c/72f4c2b7a48423c708f2c348585419a1b71ab04c"},{"url":"https://git.kernel.org/stable/c/fd8223c53ad9553b2a349d2a40e19bbc6e60fc48"},{"url":"https://git.kernel.org/stable/c/ac866db277a4c73e84b4263773652e3aba326249"},{"url":"https://git.kernel.org/stable/c/5e142adbbdc54afbd01fad476c91cded41d22594"},{"url":"https://git.kernel.org/stable/c/53823e25793a97d07e6e98e0904bbf74cac8bc76"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:15:39.242Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}