{"id":"CVE-2026-93219","published":"2026-09-24T16:17:17.030","lastModified":"2026-09-24T16:17:17.030","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sun4i: Advertise a real minimum delta\n\nsun4i_clkevt_next_event() compensates for the timer stop/start\nsynchronization delay by programming evt - TIMER_SYNC_TICKS into the\nhardware interval register. The clockevent device currently advertises\nTIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed\nto call set_next_event() with evt == TIMER_SYNC_TICKS.\n\nThat programs a zero-tick interval. With oneshot/highres/nohz timer\noperation this can leave the next event stuck, which was observed as a\nboot hang on Allwinner D1 after the clockevents core started reusing\nforced minimum-delta events.\n\nAdvertise one extra tick instead, so the smallest event accepted by the\ncore still programs at least one hardware tick after the synchronization\ncompensation.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943","tags":[]},{"url":"https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc","tags":[]},{"url":"https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98","tags":[]},{"url":"https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7","tags":[]},{"url":"https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252","tags":[]},{"url":"https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e","tags":[]},{"url":"https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44","tags":[]},{"url":"https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}