Not yet scoredPublished Sep 24, 2026

CVE-2026-93219clocksource/drivers/timer-sun4i: Advertise a real minimum delta

Updated under an hour ago (Oct 27, 2026, 8:25 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/timer-sun4i: Advertise a real minimum delta sun4i_clkevt_next_event() compensates for the timer stop/start synchronization delay by programming evt - TIMER_SYNC_TICKS into the hardware interval register. The clockevent device currently advertises TIMER_SYNC_TICKS as min_delta_ticks, so the clockevents core is allowed to call set_next_event() with evt == TIMER_SYNC_TICKS. That programs a zero-tick interval. With oneshot/highres/nohz timer operation this can leave the next event stuck, which was observed as a boot hang on Allwinner D1 after the clockevents core started reusing forced minimum-delta events. Advertise one extra tick instead, so the smallest event accepted by the core still programs at least one hardware tick after the synchronization compensation.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	12e1480bcb4920c1b02b3793cb48756497919a60 builds before 0cc4b14d7401d50e53a01f1554147ee075ee6943; from 12e1480bcb4920c1b02b3793cb48756497919a60 before 53a3bc024b8e5d284468cce84957cded5f859f98; from 12e1480bcb4920c1b02b3793cb48756497919a60 before 753a220084dfc4d737f2ab9eaddc9a01a397edd7; from 12e1480bcb4920c1b02b3793cb48756497919a60 before ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44; from 12e1480bcb4920c1b02b3793cb48756497919a60 before 151eb52f8712017c8f7b00bb2305e8916cb9e3dc; from 12e1480bcb4920c1b02b3793cb48756497919a60 before bf38be01d43c4e4ca903aff7236d8486a950a252; from 12e1480bcb4920c1b02b3793cb48756497919a60 before f0efafcdf6eec1f3361bfd8c811420198f55c8bb; from 12e1480bcb4920c1b02b3793cb48756497919a60 before d21808328225ab8cee46885bf9a0dffcefbe630e	CNA record

References

References

https://git.kernel.org/stable/c/0cc4b14d7401d50e53a01f1554147ee075ee6943
https://git.kernel.org/stable/c/53a3bc024b8e5d284468cce84957cded5f859f98
https://git.kernel.org/stable/c/753a220084dfc4d737f2ab9eaddc9a01a397edd7
https://git.kernel.org/stable/c/ebba4d0aeba0e8eb3a9676380fc2652de8ab1c44
https://git.kernel.org/stable/c/151eb52f8712017c8f7b00bb2305e8916cb9e3dc
https://git.kernel.org/stable/c/bf38be01d43c4e4ca903aff7236d8486a950a252
https://git.kernel.org/stable/c/f0efafcdf6eec1f3361bfd8c811420198f55c8bb
https://git.kernel.org/stable/c/d21808328225ab8cee46885bf9a0dffcefbe630e

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.