Common Weakness Enumeration

CWE-835

Allowed

Loop with Unreachable Exit Condition ('Infinite Loop')

Abstraction: Base · Status: Incomplete

API response cwe.mitre.org

The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

1052 vulnerabilities reference this CWE, most recent first.

GHSA-37V5-VMQ6-F37G

Vulnerability from github – Published: 2025-04-01 18:30 – Updated: 2025-11-03 21:33
VLAI
Details

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

net_sched: Prevent creation of classes with TC_H_ROOT

The function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination condition when traversing up the qdisc tree to update parent backlog counters. However, if a class is created with classid TC_H_ROOT, the traversal terminates prematurely at this class instead of reaching the actual root qdisc, causing parent statistics to be incorrectly maintained. In case of DRR, this could lead to a crash as reported by Mingi Cho.

Prevent the creation of any Qdisc class with classid TC_H_ROOT (0xFFFFFFFF) across all qdisc types, as suggested by Jamal.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-21971"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-04-01T16:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: Prevent creation of classes with TC_H_ROOT\n\nThe function qdisc_tree_reduce_backlog() uses TC_H_ROOT as a termination\ncondition when traversing up the qdisc tree to update parent backlog\ncounters. However, if a class is created with classid TC_H_ROOT, the\ntraversal terminates prematurely at this class instead of reaching the\nactual root qdisc, causing parent statistics to be incorrectly maintained.\nIn case of DRR, this could lead to a crash as reported by Mingi Cho.\n\nPrevent the creation of any Qdisc class with classid TC_H_ROOT\n(0xFFFFFFFF) across all qdisc types, as suggested by Jamal.",
  "id": "GHSA-37v5-vmq6-f37g",
  "modified": "2025-11-03T21:33:26Z",
  "published": "2025-04-01T18:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21971"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/003d92c91cdb5a64b25a9a74cb8543aac9a8bb48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c3057a5a04d07120b3d0ec9c79568fceb9c921e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c3ca9cb48b51bd72bf76b8b05e24f3cd53db5e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78533c4a29ac3aeddce4b481770beaaa4f3bfb67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a82fe67a9f4d7123d8e5ba8f0f0806c28695006"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94edfdfb9505ab608e86599d1d1e38c83816fc1c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e05d9938b1b0ac40b6054cc5fa0ccbd9afd5ed4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e5ee00607bbfc97ef1526ea95b6b2458ac9e7cb7"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html"
    }
  ],
  "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"
    }
  ]
}

GHSA-37VF-C5QJ-3JR7

Vulnerability from github – Published: 2026-06-24 09:30 – Updated: 2026-06-28 09:31
VLAI
Details

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

io_uring/poll: fix signed comparison in io_poll_get_ownership()

io_poll_get_ownership() uses a signed comparison to check whether poll_refs has reached the threshold for the slowpath:

if (unlikely(atomic_read(&req->poll_refs) >= IO_POLL_REF_BIAS))

atomic_read() returns int (signed). When IO_POLL_CANCEL_FLAG (BIT(31)) is set in poll_refs, the value becomes negative in signed arithmetic, so the >= 128 comparison always evaluates to false and the slowpath is never taken.

Fix this by casting the atomic_read() result to unsigned int before the comparison, so that the cancel flag is treated as a large positive value and correctly triggers the slowpath.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-52933"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T08:16:23Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: fix signed comparison in io_poll_get_ownership()\n\nio_poll_get_ownership() uses a signed comparison to check whether\npoll_refs has reached the threshold for the slowpath:\n\n    if (unlikely(atomic_read(\u0026req-\u003epoll_refs) \u003e= IO_POLL_REF_BIAS))\n\natomic_read() returns int (signed). When IO_POLL_CANCEL_FLAG\n(BIT(31)) is set in poll_refs, the value becomes negative in\nsigned arithmetic, so the \u003e= 128 comparison always evaluates to\nfalse and the slowpath is never taken.\n\nFix this by casting the atomic_read() result to unsigned int\nbefore the comparison, so that the cancel flag is treated as a\nlarge positive value and correctly triggers the slowpath.",
  "id": "GHSA-37vf-c5qj-3jr7",
  "modified": "2026-06-28T09:31:36Z",
  "published": "2026-06-24T09:30:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52933"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/326941b22806cbf2df1fbfe902b7908b368cce42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/81bf96b0abbfa4cd47ea32e12596aed3855fb2f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6d191164dc81838d8dbf452a6000f68c558d1ae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf522703d4f194991615763697ae25a3f9539763"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea0697129807d718037f618221037aa0660ee3c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc47043f3d9af3efa407665b47f8378ec691ba18"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-39FP-MQMM-GXJ6

Vulnerability from github – Published: 2024-03-29 16:36 – Updated: 2025-05-07 18:49
VLAI
Summary
CodeIgniter4 DoS Vulnerability
Details

Impact

A vulnerability was found in the Language class that allowed DoS attacks. This vulnerability can be exploited by an attacker to consume a large amount of memory on the server.

Patches

Upgrade to v4.4.7 or later. See upgrading guide.

Workarounds

  • Disabling Auto Routing prevents a known attack vector in the framework.
  • Do not pass invalid values to the lang() function or Language class.

References

  • https://codeigniter4.github.io/userguide/outgoing/localization.html#language-localization
  • https://codeigniter4.github.io/userguide/general/common_functions.html#lang
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "codeigniter4/framework"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.4.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-29904"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674",
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-03-29T16:36:38Z",
    "nvd_published_at": "2024-03-29T16:15:08Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nA vulnerability was found in the Language class that allowed DoS attacks. This vulnerability can be exploited by an attacker to consume a large amount of memory on the server.\n\n### Patches\nUpgrade to v4.4.7 or later. See [upgrading guide](https://codeigniter4.github.io/userguide/installation/upgrade_447.html).\n\n### Workarounds\n- Disabling Auto Routing prevents a known attack vector in the framework.\n- Do not pass invalid values to the `lang()` function or `Language` class.\n\n### References\n- https://codeigniter4.github.io/userguide/outgoing/localization.html#language-localization\n- https://codeigniter4.github.io/userguide/general/common_functions.html#lang",
  "id": "GHSA-39fp-mqmm-gxj6",
  "modified": "2025-05-07T18:49:41Z",
  "published": "2024-03-29T16:36:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-39fp-mqmm-gxj6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29904"
    },
    {
      "type": "WEB",
      "url": "https://github.com/codeigniter4/CodeIgniter4/commit/fa851acbae7ae4c5a97f8f38ae87aa0822a334c0"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/codeigniter4/CodeIgniter4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "CodeIgniter4 DoS Vulnerability"
}

GHSA-39FV-P94V-RG6C

Vulnerability from github – Published: 2024-04-03 03:30 – Updated: 2024-11-19 00:32
VLAI
Details

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.

Severity
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-28836"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-03T03:15:10Z",
    "severity": "MODERATE"
  },
  "details": "An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When negotiating the TLS version on the server side, it can fall back to the TLS 1.2 implementation of the protocol if it is disabled. If the TLS 1.2 implementation was disabled at build time, a TLS 1.2 client could put a TLS 1.3-only server into an infinite loop processing a TLS 1.2 ClientHello, resulting in a denial of service. If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client can successfully establish a TLS 1.2 connection with the server.",
  "id": "GHSA-39fv-p94v-rg6c",
  "modified": "2024-11-19T00:32:42Z",
  "published": "2024-04-03T03:30:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-28836"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0"
    },
    {
      "type": "WEB",
      "url": "https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-39MJ-FPG2-3JRG

Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2023-08-07 20:56
VLAI
Summary
StackStorm st2 Infinite Loop Condition
Details

StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space. This can occur if Python 3.x is used, the locale is not utf-8, and there is an attempt to log Unicode data (from an action or rule name).

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "st2client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.4.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-28667"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-07-10T22:59:05Z",
    "nvd_published_at": "2021-03-18T03:15:00Z",
    "severity": "HIGH"
  },
  "details": "StackStorm before 3.4.1, in some situations, has an infinite loop that consumes all available memory and disk space. This can occur if Python 3.x is used, the locale is not utf-8, and there is an attempt to log Unicode data (from an action or rule name).",
  "id": "GHSA-39mj-fpg2-3jrg",
  "modified": "2023-08-07T20:56:50Z",
  "published": "2022-05-24T17:44:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28667"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/StackStorm/st2"
    },
    {
      "type": "WEB",
      "url": "https://stackstorm.com/2021/03/10/stackstorm-v3-4-1-security-fix"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "StackStorm st2 Infinite Loop Condition",
  "withdrawn": "2023-08-07T20:56:50Z"
}

GHSA-3C69-M56M-795W

Vulnerability from github – Published: 2022-05-13 01:47 – Updated: 2025-04-20 03:38
VLAI
Details

In Wireshark 2.2.0 to 2.2.6 and 2.0.0 to 2.0.12, the SoulSeek dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-slsk.c by making loop bounds more explicit.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-9346"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-06-02T05:29:00Z",
    "severity": "HIGH"
  },
  "details": "In Wireshark 2.2.0 to 2.2.6 and 2.0.0 to 2.0.12, the SoulSeek dissector could go into an infinite loop. This was addressed in epan/dissectors/packet-slsk.c by making loop bounds more explicit.",
  "id": "GHSA-3c69-m56m-795w",
  "modified": "2025-04-20T03:38:24Z",
  "published": "2022-05-13T01:47:56Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-9346"
    },
    {
      "type": "WEB",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=1200"
    },
    {
      "type": "WEB",
      "url": "https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=13631"
    },
    {
      "type": "WEB",
      "url": "https://code.wireshark.org/review/gitweb?p=wireshark.git%3Ba=commit%3Bh=6c0bd15bd46a95c5b7dce02fe23c594429bb6c7e"
    },
    {
      "type": "WEB",
      "url": "https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=6c0bd15bd46a95c5b7dce02fe23c594429bb6c7e"
    },
    {
      "type": "WEB",
      "url": "https://www.wireshark.org/security/wnpa-sec-2017-25.html"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/98799"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1038612"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-3CFQ-4XX4-RMPG

Vulnerability from github – Published: 2026-06-17 21:34 – Updated: 2026-06-17 21:34
VLAI
Details

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-55199"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-17T20:17:28Z",
    "severity": "HIGH"
  },
  "details": "libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.",
  "id": "GHSA-3cfq-4xx4-rmpg",
  "modified": "2026-06-17T21:34:39Z",
  "published": "2026-06-17T21:34:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-55199"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libssh2/libssh2/pull/1864"
    },
    {
      "type": "WEB",
      "url": "https://github.com/libssh2/libssh2/commit/17626857d20b3c9a1addfa45979dadcee1cd84a4"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/libssh2-pre-authentication-dos-via-ssh-msg-ext-info-handler"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

GHSA-3F2P-5JCV-CFFX

Vulnerability from github – Published: 2024-07-12 15:31 – Updated: 2026-05-12 12:32
VLAI
Details

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

net/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()

syzbot found hanging tasks waiting on rtnl_lock [1]

A reproducer is available in the syzbot bug.

When a request to add multiple actions with the same index is sent, the second request will block forever on the first request. This holds rtnl_lock, and causes tasks to hang.

Return -EAGAIN to prevent infinite looping, while keeping documented behavior.

[1]

INFO: task kworker/1:0:5088 blocked for more than 143 seconds. Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000 Workqueue: events_power_efficient reg_check_chans_work Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5d00 kernel/sched/core.c:6746 __schedule_loop kernel/sched/core.c:6823 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6838 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wiphy_lock include/net/cfg80211.h:5953 [inline] reg_leave_invalid_chans net/wireless/reg.c:2466 [inline] reg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2024-40995"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-07-12T13:15:20Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: fix possible infinite loop in tcf_idr_check_alloc()\n\nsyzbot found hanging tasks waiting on rtnl_lock [1]\n\nA reproducer is available in the syzbot bug.\n\nWhen a request to add multiple actions with the same index is sent, the\nsecond request will block forever on the first request. This holds\nrtnl_lock, and causes tasks to hang.\n\nReturn -EAGAIN to prevent infinite looping, while keeping documented\nbehavior.\n\n[1]\n\nINFO: task kworker/1:0:5088 blocked for more than 143 seconds.\nNot tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0\n\"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\ntask:kworker/1:0 state:D stack:23744 pid:5088 tgid:5088 ppid:2 flags:0x00004000\nWorkqueue: events_power_efficient reg_check_chans_work\nCall Trace:\n\u003cTASK\u003e\ncontext_switch kernel/sched/core.c:5409 [inline]\n__schedule+0xf15/0x5d00 kernel/sched/core.c:6746\n__schedule_loop kernel/sched/core.c:6823 [inline]\nschedule+0xe7/0x350 kernel/sched/core.c:6838\nschedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895\n__mutex_lock_common kernel/locking/mutex.c:684 [inline]\n__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752\nwiphy_lock include/net/cfg80211.h:5953 [inline]\nreg_leave_invalid_chans net/wireless/reg.c:2466 [inline]\nreg_check_chans_work+0x10a/0x10e0 net/wireless/reg.c:2481",
  "id": "GHSA-3f2p-5jcv-cffx",
  "modified": "2026-05-12T12:32:02Z",
  "published": "2024-07-12T15:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-40995"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
    },
    {
      "type": "WEB",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-613116.html"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d8a2d287c8a394c0d4653f0c6c7be4c688e5a74"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/25987a97eec4d5f897cd04ee1b45170829c610da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f926aa96b08b6c47178fe1171e7ae331c695fc2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6fc78d67f51aeb9a542d39a8714e16bc411582d4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a0e497b597df7c4cf2b63fc6e9188b6cabe5335"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6a7da65a296745535a964be1019ec7691b0cb90"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d864319871b05fadd153e0aede4811ca7008f5d6"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "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"
    }
  ]
}

GHSA-3F98-9H78-W5JH

Vulnerability from github – Published: 2022-05-13 01:46 – Updated: 2022-05-13 01:46
VLAI
Details

Incorrect interaction of the parse_packet() and parse_part_sign_sha256() functions in network.c in collectd 5.7.1 and earlier allows remote attackers to cause a denial of service (infinite loop) of a collectd instance (configured with "SecurityLevel None" and with empty "AuthFile" options) via a crafted UDP packet.

Severity
7.5 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2017-7401"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2017-04-03T14:59:00Z",
    "severity": "HIGH"
  },
  "details": "Incorrect interaction of the parse_packet() and parse_part_sign_sha256() functions in network.c in collectd 5.7.1 and earlier allows remote attackers to cause a denial of service (infinite loop) of a collectd instance (configured with \"SecurityLevel None\" and with empty \"AuthFile\" options) via a crafted UDP packet.",
  "id": "GHSA-3f98-9h78-w5jh",
  "modified": "2022-05-13T01:46:58Z",
  "published": "2022-05-13T01:46:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7401"
    },
    {
      "type": "WEB",
      "url": "https://github.com/collectd/collectd/issues/2174"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2017:1285"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2017:1787"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2018:2615"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/97321"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-3G8C-3P92-RJWR

Vulnerability from github – Published: 2025-08-19 18:31 – Updated: 2026-01-07 21:31
VLAI
Details

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

ipv6: fix possible infinite loop in fib6_info_uses_dev()

fib6_info_uses_dev() seems to rely on RCU without an explicit protection.

Like the prior fix in rt6_nlmsg_size(), we need to make sure fib6_del_route() or fib6_add_rt2node() have not removed the anchor from the list, or we risk an infinite loop.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2025-38587"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:36Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix possible infinite loop in fib6_info_uses_dev()\n\nfib6_info_uses_dev() seems to rely on RCU without an explicit\nprotection.\n\nLike the prior fix in rt6_nlmsg_size(),\nwe need to make sure fib6_del_route() or fib6_add_rt2node()\nhave not removed the anchor from the list, or we risk an infinite loop.",
  "id": "GHSA-3g8c-3p92-rjwr",
  "modified": "2026-01-07T21:31:39Z",
  "published": "2025-08-19T18:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38587"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16d21816c0918f8058b5fc14cbe8595d62046e2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cb6de8ee144a94ae7a40bdb32560329ab7276f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bc85e62394f008fa848c4ba02c936c735a3e8ef5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db65739d406c72776fbdbbc334be827ef05880d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e09be457b71b983a085312ff9e981f51e4ed3211"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8d8ce1b515a0a6af72b30502670a406cfb75073"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
    }
  ],
  "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"
    }
  ]
}

No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.

← Back to the CWE list