{"id":"DEBIAN-CVE-2023-53094","details":"In the Linux kernel, the following vulnerability has been resolved:  tty: serial: fsl_lpuart: fix race on RX DMA shutdown  From time to time DMA completion can come in the middle of DMA shutdown:  \u003cprocess ctx\u003e:\t\t\t\t\u003cIRQ\u003e: lpuart32_shutdown()   lpuart_dma_shutdown()     del_timer_sync() \t\t\t\t\tlpuart_dma_rx_complete() \t\t\t\t\t  lpuart_copy_rx_to_tty() \t\t\t\t\t    mod_timer()     lpuart_dma_rx_free()  When the timer fires a bit later, sport-\u003edma_rx_desc is NULL:  Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004 pc : lpuart_copy_rx_to_tty+0xcc/0x5bc lr : lpuart_timer_func+0x1c/0x2c Call trace:  lpuart_copy_rx_to_tty  lpuart_timer_func  call_timer_fn  __run_timers.part.0  run_timer_softirq  __do_softirq  __irq_exit_rcu  irq_exit  handle_domain_irq  gic_handle_irq  call_on_irq_stack  do_interrupt_handler  ...  To fix this fold del_timer_sync() into lpuart_dma_rx_free() after dmaengine_terminate_sync() to make sure timer will not be re-started in lpuart_copy_rx_to_tty() \u003c= lpuart_dma_rx_complete().","modified":"2026-09-15T09:02:50.138784076Z","published":"2025-05-02T16:15:28.363Z","upstream":["CVE-2023-53094"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53094"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53094.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53094.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.25-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53094.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}