{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53094","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-05-02T15:51:43.552Z","datePublished":"2025-05-02T15:55:39.045Z","dateUpdated":"2026-05-11T19:38:24.777Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:38:24.777Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: fsl_lpuart: fix race on RX DMA shutdown\n\nFrom time to time DMA completion can come in the middle of DMA shutdown:\n\n<process ctx>:\t\t\t\t<IRQ>:\nlpuart32_shutdown()\n  lpuart_dma_shutdown()\n    del_timer_sync()\n\t\t\t\t\tlpuart_dma_rx_complete()\n\t\t\t\t\t  lpuart_copy_rx_to_tty()\n\t\t\t\t\t    mod_timer()\n    lpuart_dma_rx_free()\n\nWhen the timer fires a bit later, sport->dma_rx_desc is NULL:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000004\npc : lpuart_copy_rx_to_tty+0xcc/0x5bc\nlr : lpuart_timer_func+0x1c/0x2c\nCall trace:\n lpuart_copy_rx_to_tty\n lpuart_timer_func\n call_timer_fn\n __run_timers.part.0\n run_timer_softirq\n __do_softirq\n __irq_exit_rcu\n irq_exit\n handle_domain_irq\n gic_handle_irq\n call_on_irq_stack\n do_interrupt_handler\n ...\n\nTo fix this fold del_timer_sync() into lpuart_dma_rx_free() after\ndmaengine_terminate_sync() to make sure timer will not be re-started in\nlpuart_copy_rx_to_tty() <= lpuart_dma_rx_complete()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/fsl_lpuart.c"],"versions":[{"version":"4a8588a1cf867333187d9ff071e6fbdab587d194","lessThan":"19a98d56dfedafb25652bdb9cd48a4e73ceba702","status":"affected","versionType":"git"},{"version":"4a8588a1cf867333187d9ff071e6fbdab587d194","lessThan":"90530e7214c8a04dcdde57502d93fa96af288c38","status":"affected","versionType":"git"},{"version":"4a8588a1cf867333187d9ff071e6fbdab587d194","lessThan":"954fc9931f0aabf272b5674cf468affdd88d3a36","status":"affected","versionType":"git"},{"version":"4a8588a1cf867333187d9ff071e6fbdab587d194","lessThan":"2a36b444cace9580380467fd1183bb5e85bcc80a","status":"affected","versionType":"git"},{"version":"4a8588a1cf867333187d9ff071e6fbdab587d194","lessThan":"1be6f2b15f902c02e055ae0b419ca789200473c9","status":"affected","versionType":"git"},{"version":"5716a781032693d0f812ed06528d98195e9df028","status":"affected","versionType":"git"},{"version":"0d5cb6e8b4b62d8efd1a470615894276341d6db9","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/fsl_lpuart.c"],"versions":[{"version":"4.0","status":"affected"},{"version":"0","lessThan":"4.0","status":"unaffected","versionType":"semver"},{"version":"5.10.177","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.105","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.23","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2.8","lessThanOrEqual":"6.2.*","status":"unaffected","versionType":"semver"},{"version":"6.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.10.177"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.15.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.1.23"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.18.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.19.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/19a98d56dfedafb25652bdb9cd48a4e73ceba702"},{"url":"https://git.kernel.org/stable/c/90530e7214c8a04dcdde57502d93fa96af288c38"},{"url":"https://git.kernel.org/stable/c/954fc9931f0aabf272b5674cf468affdd88d3a36"},{"url":"https://git.kernel.org/stable/c/2a36b444cace9580380467fd1183bb5e85bcc80a"},{"url":"https://git.kernel.org/stable/c/1be6f2b15f902c02e055ae0b419ca789200473c9"}],"title":"tty: serial: fsl_lpuart: fix race on RX DMA shutdown","x_generator":{"engine":"bippy-1.2.0"}}}}