unknown CUDA errors (cuEventSynchronize(), cuMemFree(), ...)

[nashcat]

Hi,

we are experiencing CUDA errors on our MSI mining rig equipped with GTX 1080 Ti and RTX 2080 Ti. 
Because of still having 1080's in the setup, latest Nvidia driver is 32.0.15.8157. CUDA Toolkit 13.3 is installed and configured.
No overclocking setup.

While mask attacking a KeePass kdbx with 7 digits, 6.2.6 runs into an error at +/- 10 % progress, 7.1.2 even at about 1 % progress. 1 to 5 digits ran fine and 6 digits got the CUDA error at about 99 %.

Code:

hashcat.exe -m 13400 -a 3 -w 2 --increment --increment-min=7 C:\Users\admin\Documents\keepass.kdbx.hsh.txt -1 "C:\Users\admin\Documents\Hashcat\kbmask.hcchr" ?1?1?1?1?1?1?1?1 -o pw.txt --status --status-timer=6000 --backend-ignore-opencl Session..........: hashcat Status...........: Running Hash.Mode........: 13400 (KeePass 1 (AES/Twofish) and KeePass 2 (AES)) Hash.Target......: $keepass$*2*500000*0*abc......123456 Time.Started.....: Wed Aug 12 09:21:22 2026 (8 hours, 39 mins) Time.Estimated...: Sat Aug 15 05:06:28 2026 (2 days, 11 hours) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1 [7] Guess.Charset....: -1 C:\Users\admin\Documents\Hashcat\kbmask.hcchr, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/2 (50.00%) Speed.#1.........:    2900 H/s (12.04ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#2.........:    2958 H/s (11.77ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#3.........:    2935 H/s (11.87ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#4.........:    2938 H/s (11.85ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#5.........:    2444 H/s (11.75ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#6.........:    2463 H/s (11.67ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#7.........:    2485 H/s (11.71ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#*.........:    19124 H/s Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 518488064/4586471424 (11.30%) Rejected.........: 0/518488064 (0.00%) Restore.Point....: 0/191102976 (0.00%) Restore.Sub.#1...: Salt:0 Amplifier:12-13 Iteration:382336-382400 Restore.Sub.#2...: Salt:0 Amplifier:19-20 Iteration:115520-115584 Restore.Sub.#3...: Salt:0 Amplifier:16-17 Iteration:336000-336064 Restore.Sub.#4...: Salt:0 Amplifier:16-17 Iteration:496640-496704 Restore.Sub.#5...: Salt:0 Amplifier:16-17 Iteration:378112-378240 Restore.Sub.#6...: Salt:0 Amplifier:21-22 Iteration:477056-477184 Restore.Sub.#7...: Salt:0 Amplifier:4-5 Iteration:472704-472832 Candidate.Engine.: Device Generator Candidates.#1....: oaDosTT -> onn..Da Candidates.#2....: EariEto -> EnhehCU Candidates.#3....: THairDa -> T:dmmDa Candidates.#4....: TmhehCU -> TUEUtET Candidates.#5....: TaiHeCU -> TUroDnd Candidates.#6....: Umb..Da -> U:hUtTT Candidates.#7....: aHGDDon -> anhhnta Hardware.Mon.#1..: Temp: 62c Fan: 54% Util: 98% Core:1935MHz Mem:6800MHz Bus:1 Hardware.Mon.#2..: Temp: 59c Fan: 51% Util: 98% Core:1980MHz Mem:6800MHz Bus:1 Hardware.Mon.#3..: Temp: 61c Fan: 54% Util: 98% Core:1965MHz Mem:6800MHz Bus:1 Hardware.Mon.#4..: Temp: 59c Fan: 52% Util: 98% Core:1965MHz Mem:6800MHz Bus:1 Hardware.Mon.#5..: Temp: 62c Fan: 35% Util: 97% Core:2012MHz Mem:5103MHz Bus:1 Hardware.Mon.#6..: Temp: 64c Fan: 43% Util: 97% Core:2037MHz Mem:5103MHz Bus:1 Hardware.Mon.#7..: Temp: 47c Fan: 29% Util:100% Core:2025MHz Mem:5103MHz Bus:1 [s]tatus [p]ause [b]ypass [c]heckpoint [f]inish [q]uit => cuEventSynchronize(): unknown error cuEventElapsedTime(): unknown errorcuEventElapsedTime(): unknown error cuEventElapsedTime(): unknown error cuEventElapsedTime(): unknown error cuEventElapsedTime(): unknown error cuEventElapsedTime(): unknown error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetUtilizationRates(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error nvmlDeviceGetFanSpeed(): Unknown Error Session..........: hashcat Status...........: Error Hash.Mode........: 13400 (KeePass 1 (AES/Twofish) and KeePass 2 (AES)) Hash.Target......: $keepass$*2*500000*0*abc......123456 Time.Started.....: Wed Aug 12 09:21:22 2026 (9 hours, 4 mins) Time.Estimated...: Sat Aug 15 05:09:36 2026 (2 days, 10 hours) Kernel.Feature...: Pure Kernel Guess.Mask.......: ?1?1?1?1?1?1?1 [7] Guess.Charset....: -1 C:\Users\admin\Documents\Hashcat\kbmask.hcchr, -2 Undefined, -3 Undefined, -4 Undefined Guess.Queue......: 1/2 (50.00%) Speed.#1.........:    2900 H/s (12.03ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#2.........:    2958 H/s (11.77ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#3.........:    2935 H/s (11.87ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#4.........:    2938 H/s (11.87ms) @ Accel:64 Loops:64 Thr:64 Vec:1 Speed.#5.........:    2444 H/s (11.75ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#6.........:    2463 H/s (11.62ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#7.........:    2485 H/s (11.71ms) @ Accel:8 Loops:128 Thr:512 Vec:1 Speed.#*.........:    19124 H/s Recovered........: 0/1 (0.00%) Digests (total), 0/1 (0.00%) Digests (new) Progress.........: 542703616/4586471424 (11.83%) Rejected.........: 0/542703616 (0.00%) Restore.Point....: 0/191102976 (0.00%) Restore.Sub.#1...: Salt:0 Amplifier:3-4 Iteration:431424-431488 Restore.Sub.#2...: Salt:0 Amplifier:10-11 Iteration:327680-327744 Restore.Sub.#3...: Salt:0 Amplifier:7-8 Iteration:487872-487936 Restore.Sub.#4...: Salt:0 Amplifier:8-9 Iteration:156416-156480 Restore.Sub.#5...: Salt:0 Amplifier:23-24 Iteration:358656-358784 Restore.Sub.#6...: Salt:0 Amplifier:5-6 Iteration:73856-73984 Restore.Sub.#7...: Salt:0 Amplifier:4-5 Iteration:472704-472832 Candidate.Engine.: Device Generator Candidates.#1....: baid\ch -> bnUrG:m Candidates.#2....: iaDcsET -> innHHnd Candidates.#3....: rHhni\s -> r:huUou Candidates.#4....: hmbGiHo -> hUhni\s Candidates.#5....: \mhheHo -> \:dHiDa Candidates.#6....: dmUrG:m -> d:UbaUC Candidates.#7....: aHGDDon -> anhhnta Hardware.Mon.#1..: Temp: 60c Core:1935MHz Mem:6800MHz Bus:1 Hardware.Mon.#2..: Temp: 55c Core:1980MHz Mem:6800MHz Bus:1 Hardware.Mon.#3..: Temp: 59c Core:1965MHz Mem:6800MHz Bus:1 Hardware.Mon.#4..: Temp: 55c Core:1965MHz Mem:6800MHz Bus:1 Hardware.Mon.#5..: Temp: 62c Core:2012MHz Mem:5103MHz Bus:1 Hardware.Mon.#6..: Temp: 63c Core:2037MHz Mem:5103MHz Bus:1 Hardware.Mon.#7..: Temp: 46c Core: 139MHz Mem: 810MHz Bus:1 cuMemcpyHtoDAsync(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuMemFree(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuEventDestroy(): unknown error cuStreamDestroy(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error cuModuleUnload(): unknown error Started: Wed Aug 12 09:21:13 2026 Stopped: Wed Aug 12 18:25:29 2026

Is anyone having an idea what causes these errors?

Thank you,

nashcat