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🐛macOS Catalina - Latest versions of cloudflared throw Segmentation fault: 11
Describe the bug On macOS Catalina (10.15.7), running any version of cloudflared past and including 2025.6.1 results in a Segmentation fault: 11 error.
Previous versions, including 2025.6.0, function normally/as expected.
To Reproduce Steps to reproduce the behavior:
- Install cloudflared 2025.6.1 or newer either manually or via auto-update.
- Error occurs.
- See error
Expected behavior cloudflared runs as normal
Environment and versions
- OS: macOS Catalina 10.15.7
- Architecture: Intel
- Version: 2025.6.1+
Logs and errors Crash diag:
-------------------------------------
Translated Report (Full Report Below)
-------------------------------------
Incident Identifier: DEA35573-B37D-4A8C-ACCF-A717B1267C3E
CrashReporter Key: 9A8B2812-140D-3F52-F4CE-FEBF6A2C6DF1
Hardware Model: Macmini6,2
Process: cloudflared [26847]
Path: /usr/local/bin/cloudflared
Identifier: cloudflared
Version: ???
Code Type: X86-64 (Native)
Role: Unspecified
Parent Process: launchd [1]
Coalition: com.cloudflare.cloudflared [107]
Date/Time: 2025-08-19 14:06:38.7786 -0700
Launch Time: 2025-08-19 14:06:38.7708 -0700
OS Version: Mac OS X 10.15.7 (19H2026)
Release Type:
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x01a88010
VM Region Info: 0x1a88010 is not in any region. Bytes before following region: 4405739504
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
__TEXT 000000010842c000-0000000109246000 [ 14.1M] r-x/r-x SM=COW ...n/cloudflared
Exception Note: EXC_CORPSE_NOTIFY
Termination Reason: SIGNAL 11 Segmentation fault: 11
Namespace SIGNAL, Code 0xb
Triggered by Thread: 0
Thread 0 Crashed:
0 dyld 0x10c52ce67 0x10c4fa000 + 208487
1 dyld 0x10c52d3fa 0x10c4fa000 + 209914
2 dyld 0x10c51c870 0x10c4fa000 + 141424
3 dyld 0x10c51b462 0x10c4fa000 + 136290
4 dyld 0x10c50f078 0x10c4fa000 + 86136
5 dyld 0x10c501b4d 0x10c4fa000 + 31565
6 dyld 0x10c4fb227 0x10c4fa000 + 4647
7 dyld 0x10c4fb025 0x10c4fa000 + 4133
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x0000000000000004 rbx: 0x00007ffee77d28e0 rcx: 0x0000000001a88000 rdx: 0x00007ffee77d2697
rdi: 0x00007ffee77d2760 rsi: 0x0000000000000008 rbp: 0x00007ffee77d2a20 rsp: 0x00007ffee77d27a0
r8: 0x000000010842ce90 r9: 0x0000000000010000 r10: 0x00007ffee77d2697 r11: 0x000000010842c970
r12: 0x00007ffee77d2928 r13: 0x000000010842c000 r14: 0x00007ffee77d2d40 r15: 0x0000000000000000
rip: 0x000000010c52ce67 rfl: 0x0000000000010206 cr2: 0x0000000001a88010
Logical CPU: 4
Error Code: 0x00000004
Trap Number: 14
Binary Images:
0x10c4fa000 - 0x10c58cfff dyld x86_64 <9f48f7f894d0379399b7ddef657ef956> /usr/lib/dyld
EOF
-----------
Full Report
-----------
{"share_with_app_devs":0,"app_version":"","bug_type":"309","timestamp":"2025-08-19 14:06:39.00 -0700","os_version":"Mac OS X 10.15.7 (19H2026)","slice_uuid":"f7cb08bc-eca1-3d9e-f44e-b17d4966b12f","is_first_party":1,"build_version":"","incident_id":"DEA35573-B37D-4A8C-ACCF-A717B1267C3E","app_name":"cloudflared","name":"cloudflared"}
{
"uptime" : 45000000,
"procLaunch" : "2025-08-19 14:06:38.7708 -0700",
"procRole" : "Unspecified",
"exception" : {
"type" : "EXC_BAD_ACCESS",
"signal" : "SIGSEGV",
"subtype" : "KERN_INVALID_ADDRESS at 0x01a88010"
},
"userID" : 0,
"modelCode" : "Macmini6,2",
"coalitionID" : 107,
"osVersion" : {
"train" : "Mac OS X 10.15.7",
"build" : "19H2026",
"releaseType" : ""
},
"captureTime" : "2025-08-19 14:06:38.7786 -0700",
"incident" : "DEA35573-B37D-4A8C-ACCF-A717B1267C3E",
"pid" : 26847,
"cpuType" : "X86-64",
"procName" : "cloudflared",
"procPath" : "\/usr\/local\/bin\/cloudflared",
"parentProc" : "launchd",
"parentPid" : 1,
"coalitionName" : "com.cloudflare.cloudflared",
"crashReporterKey" : "9A8B2812-140D-3F52-F4CE-FEBF6A2C6DF1",
"sip" : "disabled",
"vmregioninfo" : "0x1a88010 is not in any region. Bytes before following region: 4405739504\n REGION TYPE START - END [ VSIZE] PRT\/MAX SHRMOD REGION DETAIL\n UNUSED SPACE AT START\n---> \n __TEXT 000000010842c000-0000000109246000 [ 14.1M] r-x\/r-x SM=COW ...n\/cloudflared",
"is_corpse" : 1,
"termination" : {"reason":"Namespace SIGNAL, Code 0xb","signal":"Segmentation fault: 11","byProc":"exc handler","code":11,"namespace":"SIGNAL","byPid":26847,"flags":0},
"extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":27816985},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
"threads" : [{"id":357231825,"frames":[[0,208487],[0,209914],[0,141424],[0,136290],[0,86136],[0,31565],[0,4647],[0,4133]],"triggered":true}],
"threadState" : {
"r13" : 4433559552,
"rax" : 4,
"rflags" : 66054,
"cpu" : 4,
"rsi" : 8,
"r14" : 140732782161216,
"trap_description" : "(no mapping for user data read)",
"r8" : 4433563280,
"cr2" : 27820048,
"rdx" : 140732782159511,
"r10" : 140732782159511,
"r9" : 65536,
"r15" : 0,
"rbx" : 140732782160096,
"trap" : 14,
"err" : 4,
"r11" : 4433561968,
"rip" : 4501720679,
"rbp" : 140732782160416,
"rsp" : 140732782159776,
"r12" : 140732782160168,
"rcx" : 27820032,
"flavor" : "x86_THREAD_STATE",
"rdi" : 140732782159712
},
"usedImages" : [
[
"9f48f7f8-94d0-3793-99b7-ddef657ef956",
4501512192,
"P"
]
],
"legacyInfo" : {
"imageExtraInfo" : [
{
"size" : 602112,
"arch" : "x86_64",
"path" : "\/usr\/lib\/dyld",
"name" : "dyld"
}
],
"threadTriggered" : {
"index" : 0
}
}
}
Additional context I know it's an old version of macOS, and is on my list to upgrade in the near future. If this version is EOL for cloudflared that's fine, I'd just like to bring this issue up in case it's unexpected and can be fixed in future versions.
Thank you!!
