Vulnerability-Lookup

GHSA-Q44M-58PC-8RR7

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

kprobes: don't call disarm_kprobe() for disabled kprobes

The assumption in __disable_kprobe() is wrong, and it could try to disarm an already disarmed kprobe and fire the WARN_ONCE() below. [0] We can easily reproduce this issue.

Write 0 to /sys/kernel/debug/kprobes/enabled.

# echo 0 > /sys/kernel/debug/kprobes/enabled

Run execsnoop. At this time, one kprobe is disabled.

# /usr/share/bcc/tools/execsnoop & [1] 2460 PCOMM PID PPID RET ARGS

# cat /sys/kernel/debug/kprobes/list ffffffff91345650 r __x64_sys_execve+0x0 [FTRACE] ffffffff91345650 k __x64_sys_execve+0x0 [DISABLED][FTRACE]

Write 1 to /sys/kernel/debug/kprobes/enabled, which changes kprobes_all_disarmed to false but does not arm the disabled kprobe.

# echo 1 > /sys/kernel/debug/kprobes/enabled

# cat /sys/kernel/debug/kprobes/list ffffffff91345650 r __x64_sys_execve+0x0 [FTRACE] ffffffff91345650 k __x64_sys_execve+0x0 [DISABLED][FTRACE]

Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().

# fg /usr/share/bcc/tools/execsnoop ^C

Actually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses some cleanups and leaves the aggregated kprobe in the hash table. Then, __unregister_trace_kprobe() initialises tk->rp.kp.list and creates an infinite loop like this.

aggregated kprobe.list -> kprobe.list -. ^ | '.__.'

In this situation, these commands fall into the infinite loop and result in RCU stall or soft lockup.

cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the infinite loop with RCU.

/usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex, and __get_valid_kprobe() is stuck in the loop.

To avoid the issue, make sure we don't call disarm_kprobe() for disabled kprobes.

[0] Failed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2) WARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129) Modules linked in: ena CPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28 Hardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017 RIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129) Code: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff <0f> 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94 RSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001 RDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff RBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff R10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40 R13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000 FS: 00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: __disable_kprobe (kernel/kprobes.c:1716) disable_kprobe (kernel/kprobes.c:2392) __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340) disable_trace_kprobe (kernel/trace/trace_kprobe.c:429) perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168) perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295) _free_event (kernel/events/core.c:4971) perf_event_release_kernel (kernel/events/core.c:5176) perf_release (kernel/events/core.c:5186) __fput (fs/file_table.c:321) task_work_run (./include/linux/ ---truncated---

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50008"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: don\u0027t call disarm_kprobe() for disabled kprobes\n\nThe assumption in __disable_kprobe() is wrong, and it could try to disarm\nan already disarmed kprobe and fire the WARN_ONCE() below. [0]  We can\neasily reproduce this issue.\n\n1. Write 0 to /sys/kernel/debug/kprobes/enabled.\n\n  # echo 0 \u003e /sys/kernel/debug/kprobes/enabled\n\n2. Run execsnoop.  At this time, one kprobe is disabled.\n\n  # /usr/share/bcc/tools/execsnoop \u0026\n  [1] 2460\n  PCOMM            PID    PPID   RET ARGS\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes\n   kprobes_all_disarmed to false but does not arm the disabled kprobe.\n\n  # echo 1 \u003e /sys/kernel/debug/kprobes/enabled\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the\n   disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().\n\n  # fg\n  /usr/share/bcc/tools/execsnoop\n  ^C\n\nActually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses\nsome cleanups and leaves the aggregated kprobe in the hash table.  Then,\n__unregister_trace_kprobe() initialises tk-\u003erp.kp.list and creates an\ninfinite loop like this.\n\n  aggregated kprobe.list -\u003e kprobe.list -.\n                                     ^    |\n                                     \u0027.__.\u0027\n\nIn this situation, these commands fall into the infinite loop and result\nin RCU stall or soft lockup.\n\n  cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the\n                                       infinite loop with RCU.\n\n  /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex,\n                                   and __get_valid_kprobe() is stuck in\n\t\t\t\t   the loop.\n\nTo avoid the issue, make sure we don\u0027t call disarm_kprobe() for disabled\nkprobes.\n\n[0]\nFailed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2)\nWARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nModules linked in: ena\nCPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28\nHardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nCode: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff \u003c0f\u003e 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94\nRSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001\nRDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff\nRBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff\nR10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40\nR13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000\nFS:  00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n\u003cTASK\u003e\n __disable_kprobe (kernel/kprobes.c:1716)\n disable_kprobe (kernel/kprobes.c:2392)\n __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340)\n disable_trace_kprobe (kernel/trace/trace_kprobe.c:429)\n perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168)\n perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295)\n _free_event (kernel/events/core.c:4971)\n perf_event_release_kernel (kernel/events/core.c:5176)\n perf_release (kernel/events/core.c:5186)\n __fput (fs/file_table.c:321)\n task_work_run (./include/linux/\n---truncated---",
  "id": "GHSA-q44m-58pc-8rr7",
  "modified": "2025-11-14T18:31:25Z",
  "published": "2025-06-18T12:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50008"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19cd630712e7c13a3dedfc6986a9b983fed6fd98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/55c7a91527343d2e0b5647cc308c6e04ddd2aa52"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f3c1bc22fc2165461883f506b4d2c3594bd7137"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/744b0d3080709a172f0408aedabd1cedd24c2ee6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c80e79906b4ca440d09e7f116609262bb747909"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b474ff1b20951f1eac75d100a93861e6da2b522b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc91d2db55acdaf0c0075b624e572d3520ca3bc3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-50008 (GCVE-0-2022-50008)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:01 – Updated: 2026-05-11 19:10

Title

kprobes: don't call disarm_kprobe() for disabled kprobes

Summary

In the Linux kernel, the following vulnerability has been resolved: kprobes: don't call disarm_kprobe() for disabled kprobes The assumption in __disable_kprobe() is wrong, and it could try to disarm an already disarmed kprobe and fire the WARN_ONCE() below. [0] We can easily reproduce this issue. 1. Write 0 to /sys/kernel/debug/kprobes/enabled. # echo 0 > /sys/kernel/debug/kprobes/enabled 2. Run execsnoop. At this time, one kprobe is disabled. # /usr/share/bcc/tools/execsnoop & [1] 2460 PCOMM PID PPID RET ARGS # cat /sys/kernel/debug/kprobes/list ffffffff91345650 r __x64_sys_execve+0x0 [FTRACE] ffffffff91345650 k __x64_sys_execve+0x0 [DISABLED][FTRACE] 3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes kprobes_all_disarmed to false but does not arm the disabled kprobe. # echo 1 > /sys/kernel/debug/kprobes/enabled # cat /sys/kernel/debug/kprobes/list ffffffff91345650 r __x64_sys_execve+0x0 [FTRACE] ffffffff91345650 k __x64_sys_execve+0x0 [DISABLED][FTRACE] 4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace(). # fg /usr/share/bcc/tools/execsnoop ^C Actually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses some cleanups and leaves the aggregated kprobe in the hash table. Then, __unregister_trace_kprobe() initialises tk->rp.kp.list and creates an infinite loop like this. aggregated kprobe.list -> kprobe.list -. ^ | '.__.' In this situation, these commands fall into the infinite loop and result in RCU stall or soft lockup. cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the infinite loop with RCU. /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex, and __get_valid_kprobe() is stuck in the loop. To avoid the issue, make sure we don't call disarm_kprobe() for disabled kprobes. [0] Failed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2) WARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129) Modules linked in: ena CPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28 Hardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017 RIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129) Code: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff <0f> 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94 RSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001 RDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff RBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff R10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40 R13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000 FS: 00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Call Trace: <TASK> __disable_kprobe (kernel/kprobes.c:1716) disable_kprobe (kernel/kprobes.c:2392) __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340) disable_trace_kprobe (kernel/trace/trace_kprobe.c:429) perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168) perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295) _free_event (kernel/events/core.c:4971) perf_event_release_kernel (kernel/events/core.c:5176) perf_release (kernel/events/core.c:5186) __fput (fs/file_table.c:321) task_work_run (./include/linux/ ---truncated---

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/19cd630712e7c13a3…
https://git.kernel.org/stable/c/6f3c1bc22fc216546…
https://git.kernel.org/stable/c/fc91d2db55acdaf0c…
https://git.kernel.org/stable/c/b474ff1b20951f1ea…
https://git.kernel.org/stable/c/744b0d3080709a172…
https://git.kernel.org/stable/c/55c7a91527343d2e0…
https://git.kernel.org/stable/c/bc3188d8a3b8c08c3…
https://git.kernel.org/stable/c/9c80e79906b4ca440…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < 19cd630712e7c13a3dedfc6986a9b983fed6fd98 (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < 6f3c1bc22fc2165461883f506b4d2c3594bd7137 (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < fc91d2db55acdaf0c0075b624e572d3520ca3bc3 (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < b474ff1b20951f1eac75d100a93861e6da2b522b (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < 744b0d3080709a172f0408aedabd1cedd24c2ee6 (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < 55c7a91527343d2e0b5647cc308c6e04ddd2aa52 (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca (git) Affected: 69d54b916d83872a0a327778a01af2a096923f59 , < 9c80e79906b4ca440d09e7f116609262bb747909 (git)
Linux	Linux	Affected: 4.0 Unaffected: 0 , < 4.0 (semver) Unaffected: 4.9.327 , ≤ 4.9.* (semver) Unaffected: 4.14.292 , ≤ 4.14.* (semver) Unaffected: 4.19.257 , ≤ 4.19.* (semver) Unaffected: 5.4.212 , ≤ 5.4.* (semver) Unaffected: 5.10.141 , ≤ 5.10.* (semver) Unaffected: 5.15.65 , ≤ 5.15.* (semver) Unaffected: 5.19.6 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/kprobes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "19cd630712e7c13a3dedfc6986a9b983fed6fd98",
              "status": "affected",
              "version": "69d54b916d83872a0a327778a01af2a096923f59",
              "versionType": "git"
            },
            {
              "lessThan": "6f3c1bc22fc2165461883f506b4d2c3594bd7137",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "fc91d2db55acdaf0c0075b624e572d3520ca3bc3",
              "status": "affected",
              "version": "69d54b916d83872a0a327778a01af2a096923f59",
              "versionType": "git"
            },
            {
              "lessThan": "b474ff1b20951f1eac75d100a93861e6da2b522b",
              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
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              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
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        {
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          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "lessThan": "4.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.327",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.292",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.257",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.65",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.327",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.292",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.257",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.212",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.141",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.65",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.6",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: don\u0027t call disarm_kprobe() for disabled kprobes\n\nThe assumption in __disable_kprobe() is wrong, and it could try to disarm\nan already disarmed kprobe and fire the WARN_ONCE() below. [0]  We can\neasily reproduce this issue.\n\n1. Write 0 to /sys/kernel/debug/kprobes/enabled.\n\n  # echo 0 \u003e /sys/kernel/debug/kprobes/enabled\n\n2. Run execsnoop.  At this time, one kprobe is disabled.\n\n  # /usr/share/bcc/tools/execsnoop \u0026\n  [1] 2460\n  PCOMM            PID    PPID   RET ARGS\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n3. Write 1 to /sys/kernel/debug/kprobes/enabled, which changes\n   kprobes_all_disarmed to false but does not arm the disabled kprobe.\n\n  # echo 1 \u003e /sys/kernel/debug/kprobes/enabled\n\n  # cat /sys/kernel/debug/kprobes/list\n  ffffffff91345650  r  __x64_sys_execve+0x0    [FTRACE]\n  ffffffff91345650  k  __x64_sys_execve+0x0    [DISABLED][FTRACE]\n\n4. Kill execsnoop, when __disable_kprobe() calls disarm_kprobe() for the\n   disabled kprobe and hits the WARN_ONCE() in __disarm_kprobe_ftrace().\n\n  # fg\n  /usr/share/bcc/tools/execsnoop\n  ^C\n\nActually, WARN_ONCE() is fired twice, and __unregister_kprobe_top() misses\nsome cleanups and leaves the aggregated kprobe in the hash table.  Then,\n__unregister_trace_kprobe() initialises tk-\u003erp.kp.list and creates an\ninfinite loop like this.\n\n  aggregated kprobe.list -\u003e kprobe.list -.\n                                     ^    |\n                                     \u0027.__.\u0027\n\nIn this situation, these commands fall into the infinite loop and result\nin RCU stall or soft lockup.\n\n  cat /sys/kernel/debug/kprobes/list : show_kprobe_addr() enters into the\n                                       infinite loop with RCU.\n\n  /usr/share/bcc/tools/execsnoop : warn_kprobe_rereg() holds kprobe_mutex,\n                                   and __get_valid_kprobe() is stuck in\n\t\t\t\t   the loop.\n\nTo avoid the issue, make sure we don\u0027t call disarm_kprobe() for disabled\nkprobes.\n\n[0]\nFailed to disarm kprobe-ftrace at __x64_sys_execve+0x0/0x40 (error -2)\nWARNING: CPU: 6 PID: 2460 at kernel/kprobes.c:1130 __disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nModules linked in: ena\nCPU: 6 PID: 2460 Comm: execsnoop Not tainted 5.19.0+ #28\nHardware name: Amazon EC2 c5.2xlarge/, BIOS 1.0 10/16/2017\nRIP: 0010:__disarm_kprobe_ftrace.isra.19 (kernel/kprobes.c:1129)\nCode: 24 8b 02 eb c1 80 3d c4 83 f2 01 00 75 d4 48 8b 75 00 89 c2 48 c7 c7 90 fa 0f 92 89 04 24 c6 05 ab 83 01 e8 e4 94 f0 ff \u003c0f\u003e 0b 8b 04 24 eb b1 89 c6 48 c7 c7 60 fa 0f 92 89 04 24 e8 cc 94\nRSP: 0018:ffff9e6ec154bd98 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffffffff930f7b00 RCX: 0000000000000001\nRDX: 0000000080000001 RSI: ffffffff921461c5 RDI: 00000000ffffffff\nRBP: ffff89c504286da8 R08: 0000000000000000 R09: c0000000fffeffff\nR10: 0000000000000000 R11: ffff9e6ec154bc28 R12: ffff89c502394e40\nR13: ffff89c502394c00 R14: ffff9e6ec154bc00 R15: 0000000000000000\nFS:  00007fe800398740(0000) GS:ffff89c812d80000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000000c00057f010 CR3: 0000000103b54006 CR4: 00000000007706e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nPKRU: 55555554\nCall Trace:\n\u003cTASK\u003e\n __disable_kprobe (kernel/kprobes.c:1716)\n disable_kprobe (kernel/kprobes.c:2392)\n __disable_trace_kprobe (kernel/trace/trace_kprobe.c:340)\n disable_trace_kprobe (kernel/trace/trace_kprobe.c:429)\n perf_trace_event_unreg.isra.2 (./include/linux/tracepoint.h:93 kernel/trace/trace_event_perf.c:168)\n perf_kprobe_destroy (kernel/trace/trace_event_perf.c:295)\n _free_event (kernel/events/core.c:4971)\n perf_event_release_kernel (kernel/events/core.c:5176)\n perf_release (kernel/events/core.c:5186)\n __fput (fs/file_table.c:321)\n task_work_run (./include/linux/\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:10:56.412Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19cd630712e7c13a3dedfc6986a9b983fed6fd98"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f3c1bc22fc2165461883f506b4d2c3594bd7137"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc91d2db55acdaf0c0075b624e572d3520ca3bc3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b474ff1b20951f1eac75d100a93861e6da2b522b"
        },
        {
          "url": "https://git.kernel.org/stable/c/744b0d3080709a172f0408aedabd1cedd24c2ee6"
        },
        {
          "url": "https://git.kernel.org/stable/c/55c7a91527343d2e0b5647cc308c6e04ddd2aa52"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc3188d8a3b8c08c306a4c851ddb2c92ba4599ca"
        },
        {
          "url": "https://git.kernel.org/stable/c/9c80e79906b4ca440d09e7f116609262bb747909"
        }
      ],
      "title": "kprobes: don\u0027t call disarm_kprobe() for disabled kprobes",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50008",
    "datePublished": "2025-06-18T11:01:13.331Z",
    "dateReserved": "2025-06-18T10:57:27.388Z",
    "dateUpdated": "2026-05-11T19:10:56.412Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-Q44M-58PC-8RR7

CVE-2022-50008 (GCVE-0-2022-50008)

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