CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6325 vulnerabilities reference this CWE, most recent first.
GHSA-3958-X3R2-XC87
Vulnerability from github – Published: 2022-05-14 02:03 – Updated: 2022-05-14 02:03An issue was discovered in Xen 4.8.x through 4.10.x allowing x86 PVH guest OS users to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC.
{
"affected": [],
"aliases": [
"CVE-2018-7542"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-02-27T19:29:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in Xen 4.8.x through 4.10.x allowing x86 PVH guest OS users to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC.",
"id": "GHSA-3958-x3r2-xc87",
"modified": "2022-05-14T02:03:05Z",
"published": "2022-05-14T02:03:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7542"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201810-06"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4131"
},
{
"type": "WEB",
"url": "https://xenbits.xen.org/xsa/advisory-256.html"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1040776"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-3969-JVQ7-CJF4
Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-05-22 03:30In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()
In mesh_rx_csa_frame(), elems->mesh_chansw_params_ie is dereferenced at lines 1638 and 1642 without a prior NULL check:
ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl;
...
pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value);
The mesh_matches_local() check above only validates the Mesh ID, Mesh Configuration, and Supported Rates IEs. It does not verify the presence of the Mesh Channel Switch Parameters IE (element ID 118). When a received CSA action frame omits that IE, ieee802_11_parse_elems() leaves elems->mesh_chansw_params_ie as NULL, and the unconditional dereference causes a kernel NULL pointer dereference.
A remote mesh peer with an established peer link (PLINK_ESTAB) can trigger this by sending a crafted SPECTRUM_MGMT/CHL_SWITCH action frame that includes a matching Mesh ID and Mesh Configuration IE but omits the Mesh Channel Switch Parameters IE. No authentication beyond the default open mesh peering is required.
Crash confirmed on kernel 6.17.0-5-generic via mac80211_hwsim:
BUG: kernel NULL pointer dereference, address: 0000000000000000 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:ieee80211_mesh_rx_queued_mgmt+0x143/0x2a0 [mac80211] CR2: 0000000000000000
Fix by adding a NULL check for mesh_chansw_params_ie after mesh_matches_local() returns, consistent with how other optional IEs are guarded throughout the mesh code.
The bug has been present since v3.13 (released 2014-01-19).
{
"affected": [],
"aliases": [
"CVE-2026-23279"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-25T11:16:22Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame()\n\nIn mesh_rx_csa_frame(), elems-\u003emesh_chansw_params_ie is dereferenced\nat lines 1638 and 1642 without a prior NULL check:\n\n ifmsh-\u003echsw_ttl = elems-\u003emesh_chansw_params_ie-\u003emesh_ttl;\n ...\n pre_value = le16_to_cpu(elems-\u003emesh_chansw_params_ie-\u003emesh_pre_value);\n\nThe mesh_matches_local() check above only validates the Mesh ID,\nMesh Configuration, and Supported Rates IEs. It does not verify the\npresence of the Mesh Channel Switch Parameters IE (element ID 118).\nWhen a received CSA action frame omits that IE, ieee802_11_parse_elems()\nleaves elems-\u003emesh_chansw_params_ie as NULL, and the unconditional\ndereference causes a kernel NULL pointer dereference.\n\nA remote mesh peer with an established peer link (PLINK_ESTAB) can\ntrigger this by sending a crafted SPECTRUM_MGMT/CHL_SWITCH action frame\nthat includes a matching Mesh ID and Mesh Configuration IE but omits the\nMesh Channel Switch Parameters IE. No authentication beyond the default\nopen mesh peering is required.\n\nCrash confirmed on kernel 6.17.0-5-generic via mac80211_hwsim:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n Oops: Oops: 0000 [#1] SMP NOPTI\n RIP: 0010:ieee80211_mesh_rx_queued_mgmt+0x143/0x2a0 [mac80211]\n CR2: 0000000000000000\n\nFix by adding a NULL check for mesh_chansw_params_ie after\nmesh_matches_local() returns, consistent with how other optional IEs\nare guarded throughout the mesh code.\n\nThe bug has been present since v3.13 (released 2014-01-19).",
"id": "GHSA-3969-jvq7-cjf4",
"modified": "2026-05-22T03:30:25Z",
"published": "2026-03-25T12:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23279"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/017c1792525064a723971f0216e6ef86a8c7af11"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/22a9adea7e26d236406edc0ea00b54351dd56b9c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2b5f282b1b7241ef624c3399a1cdff0bb1a3eeab"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/753ad20dcbe36b67088c7770d8fc357d7cc43e08"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/be8b82c567fda86f2cbb43b7208825125bb31421"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cc6d5a3c0a854aeae00915fc5386570c86029c60"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f061336f072ab03fd29270ae61fede46bf8fd69d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f5d8af683410a8c82e48b51291915bd612523d9a"
}
],
"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-396F-8JHP-Q236
Vulnerability from github – Published: 2022-05-24 19:05 – Updated: 2022-05-24 19:05A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Linux Security whereby the FSAVD component used in certain F-Secure products can crash while scanning larger packages/fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.
{
"affected": [],
"aliases": [
"CVE-2021-33572"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-06-21T12:15:00Z",
"severity": "MODERATE"
},
"details": "A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Linux Security whereby the FSAVD component used in certain F-Secure products can crash while scanning larger packages/fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.",
"id": "GHSA-396f-8jhp-q236",
"modified": "2022-05-24T19:05:46Z",
"published": "2022-05-24T19:05:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33572"
},
{
"type": "WEB",
"url": "https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame"
},
{
"type": "WEB",
"url": "https://www.f-secure.com/en/business/support-and-downloads/security-advisories"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-398F-64GC-QXQM
Vulnerability from github – Published: 2026-02-14 18:30 – Updated: 2026-03-18 15:30In the Linux kernel, the following vulnerability has been resolved:
perf: sched: Fix perf crash with new is_user_task() helper
In order to do a user space stacktrace the current task needs to be a user task that has executed in user space. It use to be possible to test if a task is a user task or not by simply checking the task_struct mm field. If it was non NULL, it was a user task and if not it was a kernel task.
But things have changed over time, and some kernel tasks now have their own mm field.
An idea was made to instead test PF_KTHREAD and two functions were used to wrap this check in case it became more complex to test if a task was a user task or not[1]. But this was rejected and the C code simply checked the PF_KTHREAD directly.
It was later found that not all kernel threads set PF_KTHREAD. The io-uring helpers instead set PF_USER_WORKER and this needed to be added as well.
But checking the flags is still not enough. There's a very small window when a task exits that it frees its mm field and it is set back to NULL. If perf were to trigger at this moment, the flags test would say its a user space task but when perf would read the mm field it would crash with at NULL pointer dereference.
Now there are flags that can be used to test if a task is exiting, but they are set in areas that perf may still want to profile the user space task (to see where it exited). The only real test is to check both the flags and the mm field.
Instead of making this modification in every location, create a new is_user_task() helper function that does all the tests needed to know if it is safe to read the user space memory or not.
[1] https://lore.kernel.org/all/20250425204120.639530125@goodmis.org/
{
"affected": [],
"aliases": [
"CVE-2026-23159"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-14T16:15:56Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: sched: Fix perf crash with new is_user_task() helper\n\nIn order to do a user space stacktrace the current task needs to be a user\ntask that has executed in user space. It use to be possible to test if a\ntask is a user task or not by simply checking the task_struct mm field. If\nit was non NULL, it was a user task and if not it was a kernel task.\n\nBut things have changed over time, and some kernel tasks now have their\nown mm field.\n\nAn idea was made to instead test PF_KTHREAD and two functions were used to\nwrap this check in case it became more complex to test if a task was a\nuser task or not[1]. But this was rejected and the C code simply checked\nthe PF_KTHREAD directly.\n\nIt was later found that not all kernel threads set PF_KTHREAD. The io-uring\nhelpers instead set PF_USER_WORKER and this needed to be added as well.\n\nBut checking the flags is still not enough. There\u0027s a very small window\nwhen a task exits that it frees its mm field and it is set back to NULL.\nIf perf were to trigger at this moment, the flags test would say its a\nuser space task but when perf would read the mm field it would crash with\nat NULL pointer dereference.\n\nNow there are flags that can be used to test if a task is exiting, but\nthey are set in areas that perf may still want to profile the user space\ntask (to see where it exited). The only real test is to check both the\nflags and the mm field.\n\nInstead of making this modification in every location, create a new\nis_user_task() helper function that does all the tests needed to know if\nit is safe to read the user space memory or not.\n\n[1] https://lore.kernel.org/all/20250425204120.639530125@goodmis.org/",
"id": "GHSA-398f-64gc-qxqm",
"modified": "2026-03-18T15:30:40Z",
"published": "2026-02-14T18:30:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23159"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5aac392fcd3d981d7997f1a0766829e1afdeac2e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/76ed27608f7dd235b727ebbb12163438c2fbb617"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a28fce0365e1cb9cb8c04c893b9334e5ca9d9f1c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d84a4836dc246b7dc244e46a08ff992956b68db0"
}
],
"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-39CX-99PJ-4MQG
Vulnerability from github – Published: 2023-07-06 15:30 – Updated: 2024-04-04 05:26Race condition vulnerability due to multi-thread access to mutually exclusive resources in Huawei Share. Successful exploitation of this vulnerability may cause the program to exit abnormally.
{
"affected": [],
"aliases": [
"CVE-2022-48509"
],
"database_specific": {
"cwe_ids": [
"CWE-362",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-06T13:15:10Z",
"severity": "MODERATE"
},
"details": "Race condition vulnerability due to multi-thread access to mutually exclusive resources in Huawei Share. Successful exploitation of this vulnerability may cause the program to exit abnormally.",
"id": "GHSA-39cx-99pj-4mqg",
"modified": "2024-04-04T05:26:03Z",
"published": "2023-07-06T15:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48509"
},
{
"type": "WEB",
"url": "https://consumer.huawei.com/en/support/bulletin/2023/7"
},
{
"type": "WEB",
"url": "https://device.harmonyos.com/en/docs/security/update/security-bulletins-202307-0000001587168858"
}
],
"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"
}
]
}
GHSA-39GW-MQ6Q-79FW
Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2024-12-26 21:30In the Linux kernel, the following vulnerability has been resolved:
usb: misc: brcmstb-usb-pinmap: check return value after calling platform_get_resource()
It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value.
{
"affected": [],
"aliases": [
"CVE-2021-47279"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T15:15:16Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: misc: brcmstb-usb-pinmap: check return value after calling platform_get_resource()\n\nIt will cause null-ptr-deref if platform_get_resource() returns NULL,\nwe need check the return value.",
"id": "GHSA-39gw-mq6q-79fw",
"modified": "2024-12-26T21:30:35Z",
"published": "2024-05-21T15:31:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47279"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2147684be1ebdaf845783139b9bc4eba3fecd9e4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fbf649cd6d64d40c03c5397ecd6b1ae922ba7afc"
}
],
"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-39HP-247X-9W6H
Vulnerability from github – Published: 2022-05-14 03:46 – Updated: 2022-05-14 03:46In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.
{
"affected": [],
"aliases": [
"CVE-2017-15267"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-10-11T17:29:00Z",
"severity": "HIGH"
},
"details": "In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.",
"id": "GHSA-39hp-247x-9w6h",
"modified": "2022-05-14T03:46:34Z",
"published": "2022-05-14T03:46:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-15267"
},
{
"type": "WEB",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1499600"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2017/12/msg00000.html"
},
{
"type": "WEB",
"url": "http://lists.gnu.org/archive/html/bug-libextractor/2017-10/msg00003.html"
},
{
"type": "WEB",
"url": "http://openwall.com/lists/oss-security/2017/10/11/1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/101272"
}
],
"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-39X4-PH74-C88F
Vulnerability from github – Published: 2025-10-03 21:30 – Updated: 2025-10-08 21:30A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
{
"affected": [],
"aliases": [
"CVE-2025-52866"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-03T19:15:48Z",
"severity": "MODERATE"
},
"details": "A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.6.3195 build 20250715 and later\nQuTS hero h5.2.6.3195 build 20250715 and later",
"id": "GHSA-39x4-ph74-c88f",
"modified": "2025-10-08T21:30:24Z",
"published": "2025-10-03T21:30:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52866"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-25-36"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/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-39XQ-39V8-2G6G
Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-02-26 21:31In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy
syzbot reported a crash in tc_act_in_hw() during netns teardown where tcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action pointer, leading to an invalid dereference.
Guard against ERR_PTR entries when iterating the action IDR so teardown does not call tc_act_in_hw() on an error pointer.
{
"affected": [],
"aliases": [
"CVE-2026-22987"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-01-23T16:15:54Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_api: avoid dereferencing ERR_PTR in tcf_idrinfo_destroy\n\nsyzbot reported a crash in tc_act_in_hw() during netns teardown where\ntcf_idrinfo_destroy() passed an ERR_PTR(-EBUSY) value as a tc_action\npointer, leading to an invalid dereference.\n\nGuard against ERR_PTR entries when iterating the action IDR so teardown\ndoes not call tc_act_in_hw() on an error pointer.",
"id": "GHSA-39xq-39v8-2g6g",
"modified": "2026-02-26T21:31:27Z",
"published": "2026-01-23T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22987"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/67550a1130b647bb0d093c9c0a810c69aa6a30a8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/adb25a46dc0a43173f5ea5f5f58fc8ba28970c7c"
}
],
"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-3C3H-V674-RHQR
Vulnerability from github – Published: 2022-05-14 03:11 – Updated: 2022-05-14 03:11md4c 0.2.6 has a NULL pointer dereference in the function md_process_line in md4c.c, related to ctx->current_block.
{
"affected": [],
"aliases": [
"CVE-2018-12102"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-06-11T13:29:00Z",
"severity": "MODERATE"
},
"details": "md4c 0.2.6 has a NULL pointer dereference in the function md_process_line in md4c.c, related to ctx-\u003ecurrent_block.",
"id": "GHSA-3c3h-v674-rhqr",
"modified": "2022-05-14T03:11:42Z",
"published": "2022-05-14T03:11:42Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-12102"
},
{
"type": "WEB",
"url": "https://github.com/mity/md4c/issues/41"
},
{
"type": "WEB",
"url": "https://github.com/Edward-L/fuzzing-pocs/tree/master/md4c"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Mitigation MIT-56
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Select a programming language that is not susceptible to these issues.
Mitigation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.