Been having this issue at work for about 3 months now. It had gotten worse and worse. Every update that comes out i install instantly but it only makes the crashed happen more frequent. I'm really regetting updating to Big Sur. The following crash will happen about 2 times a day. It's always when i connect one of my external monitors usb-c to display. panic(cpu 10 caller 0xffffff801b69fc36): [kext.kalloc.2048]: element modified after free (off:1672, val:0xfffffffe00000000, sz:2048, ptr:0xffffff93787f5800, prot:zero) 1672: 0xfffffffe00000000 Backtrace (CPU 10), Frame : Return Address 0xffffffb0e4842cf0 : 0xffffff801ae8e04d 0xffffffb0e4842d40 : 0xffffff801afd4e13 0xffffffb0e4842d80 : 0xffffff801afc540a 0xffffffb0e4842dd0 : 0xffffff801ae32a2f 0xffffffb0e4842df0 : 0xffffff801ae8d86d 0xffffffb0e4842f10 : 0xffffff801ae8db63 0xffffffb0e4842f80 : 0xffffff801b69dc0a 0xffffffb0e4842ff0 : 0xffffff801b69fc36 0xffffffb0e4843470 : 0xffffff801aeec9e6 0xffffffb0e48434e0 : 0xffffff801ae9d65c 0xffffffb0e4843530 : 0xffffff801b5ae872 0xffffffb0e4843550 : 0xffffff7fb52fefce 0xffffffb0e4843600 : 0xffffff7fb52ff65e 0xffffffb0e4843640 : 0xffffff7fb52bfc4a 0xffffffb0e4843660 : 0xffffff7fb5bf9e78 0xffffffb0e4843900 : 0xffffff7fb52c07e8 0xffffffb0e4843930 : 0xffffff7fb5bfb074 0xffffffb0e48439c0 : 0xffffff7fb5bf90f7 0xffffffb0e4843a10 : 0xffffff7fb5bf8ee7 0xffffffb0e4843a60 : 0xffffff7fb5bf7f99 0xffffffb0e4843aa0 : 0xffffff801b61e4be 0xffffffb0e4843af0 : 0xffffff7fb52c04a6 0xffffffb0e4843b20 : 0xffffff801b62876b 0xffffffb0e4843c80 : 0xffffff801af80841 0xffffffb0e4843d90 : 0xffffff801ae936cd 0xffffffb0e4843e00 : 0xffffff801ae69cf5 0xffffffb0e4843e60 : 0xffffff801ae81252 0xffffffb0e4843ef0 : 0xffffff801afa970d 0xffffffb0e4843fa0 : 0xffffff801ae33216 Kernel Extensions in backtrace: com.apple.iokit.IOAcceleratorFamily2(442.9)[8F6B0D56-AFD7-38F7-8EDA-B43ACA468394]@0xffffff7fb5bb4000->0xffffff7fb5c1efff dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[152D7047-0D43-3CA8-B1EA-251D3F80AC28]@0xffffff801c4c0000->0xffffff801c4d5fff dependency: com.apple.iokit.IOGraphicsFamily(585.1)[B5241FDE-C525-39D6-9813-2BE73DD7CEE3]@0xffffff7fb5d35000->0xffffff7fb5d63fff dependency: com.apple.iokit.IOPCIFamily(2.9)[F7AA4BAF-35CF-3784-A50C-5FD9CDCBE488]@0xffffff801d96c000->0xffffff801d994fff dependency: com.apple.iokit.IOReportFamily(47)[AE367C5D-FEFC-390D-ABDF-86E037890F00]@0xffffff801d9a3000->0xffffff801d9a5fff dependency: com.apple.iokit.IOSurface(290.8.1)[DCE8209F-A72D-3EBA-BE93-C0AF896AA9B5]@0xffffff801da96000->0xffffff801dab2fff com.apple.driver.AppleIntelKBLGraphics(16.0.5)[8B11EE30-3D67-3FB9-9F2E-46A1B159E059]@0xffffff7fb52a9000->0xffffff7fb5360fff dependency: com.apple.iokit.IOAcceleratorFamily2(442.9)[8F6B0D56-AFD7-38F7-8EDA-B43ACA468394]@0xffffff7fb5bb4000->0xffffff7fb5c1efff dependency: com.apple.iokit.IOGraphicsFamily(585.1)[B5241FDE-C525-39D6-9813-2BE73DD7CEE3]@0xffffff7fb5d35000->0xffffff7fb5d63fff dependency: com.apple.iokit.IOPCIFamily(2.9)[F7AA4BAF-35CF-3784-A50C-5FD9CDCBE488]@0xffffff801d96c000->0xffffff801d994fff dependency: com.apple.iokit.IOSurface(290.8.1)[DCE8209F-A72D-3EBA-BE93-C0AF896AA9B5]@0xffffff801da96000->0xffffff801dab2fff Process name corresponding to current thread: TouchBarServer Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev Mac OS version: 20G80 Kernel version: Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:31 PDT 2021; root:xnu-7195.141.2~5/RELEASE_X86_64 Kernel UUID: FECBF22B-FBBE-36DE-9664-F12A7DD41D3D KernelCache slide: 0x000000001ac00000 KernelCache base: 0xffffff801ae00000 Kernel slide: 0x000000001ac10000 Kernel text base: 0xffffff801ae10000 __HIB text base: 0xffffff801ad00000 System model name: MacBookPro16,1 (Mac-E1008331FDC96864) System shutdown begun: NO Hibernation exit count: 1