CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6305 vulnerabilities reference this CWE, most recent first.
GHSA-5GWG-FCH7-WH55
Vulnerability from github – Published: 2025-09-15 18:31 – Updated: 2025-09-15 18:31A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the processing of a crafted .djvu file. When the file is opened, the application crashes inside libmupdf.dll, specifically in the DataPool::has_data() function.
{
"affected": [],
"aliases": [
"CVE-2025-57248"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-15T16:15:39Z",
"severity": "HIGH"
},
"details": "A null pointer dereference vulnerability was discovered in SumatraPDF 3.5.2 during the processing of a crafted .djvu file. When the file is opened, the application crashes inside libmupdf.dll, specifically in the DataPool::has_data() function.",
"id": "GHSA-5gwg-fch7-wh55",
"modified": "2025-09-15T18:31:06Z",
"published": "2025-09-15T18:31:06Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-57248"
},
{
"type": "WEB",
"url": "https://github.com/sumatrapdfreader/sumatrapdf/issues/5035"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-5H25-R5H3-XWPW
Vulnerability from github – Published: 2026-02-06 03:30 – Updated: 2026-02-06 03:30A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.
{
"affected": [],
"aliases": [
"CVE-2026-1976"
],
"database_specific": {
"cwe_ids": [
"CWE-404",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-06T03:15:49Z",
"severity": "MODERATE"
},
"details": "A weakness has been identified in Free5GC up to 4.1.0. Affected is the function SessionDeletionResponse of the component SMF. This manipulation causes null pointer dereference. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. It is suggested to install a patch to address this issue.",
"id": "GHSA-5h25-r5h3-xwpw",
"modified": "2026-02-06T03:30:19Z",
"published": "2026-02-06T03:30:19Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1976"
},
{
"type": "WEB",
"url": "https://github.com/free5gc/free5gc/issues/817"
},
{
"type": "WEB",
"url": "https://github.com/free5gc/free5gc/issues/817#issue-3832188092"
},
{
"type": "WEB",
"url": "https://github.com/free5gc/smf/pull/189"
},
{
"type": "WEB",
"url": "https://github.com/free5gc/free5gc"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.344498"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.344498"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.743239"
}
],
"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:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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-5H2C-FVJP-2WMX
Vulnerability from github – Published: 2024-12-16 21:30 – Updated: 2024-12-16 21:30A vulnerability classified as problematic has been found in IObit Advanced SystemCare Utimate up to 17.0.0. This affects the function 0x8001E040 in the library AscRegistryFilter.sys of the component IOCTL Handler. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
{
"affected": [],
"aliases": [
"CVE-2024-12662"
],
"database_specific": {
"cwe_ids": [
"CWE-404",
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-12-16T19:15:07Z",
"severity": "MODERATE"
},
"details": "A vulnerability classified as problematic has been found in IObit Advanced SystemCare Utimate up to 17.0.0. This affects the function 0x8001E040 in the library AscRegistryFilter.sys of the component IOCTL Handler. The manipulation leads to null pointer dereference. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.",
"id": "GHSA-5h2c-fvjp-2wmx",
"modified": "2024-12-16T21:30:56Z",
"published": "2024-12-16T21:30:56Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-12662"
},
{
"type": "WEB",
"url": "https://shareforall.notion.site/IOBit-Advanced-SystemCare-Utimate-AscRegistryFilter-0x8001E040-NPD-DOS-15260437bb1e804e86b4e1de92ff0d09"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.288531"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.288531"
},
{
"type": "WEB",
"url": "https://vuldb.com/?submit.457163"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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-5H45-8J9Q-C6WV
Vulnerability from github – Published: 2022-05-14 01:29 – Updated: 2022-05-14 01:29A nullptr dereference in WebAssembly in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.
{
"affected": [],
"aliases": [
"CVE-2018-6116"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-12-04T17:29:00Z",
"severity": "MODERATE"
},
"details": "A nullptr dereference in WebAssembly in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.",
"id": "GHSA-5h45-8j9q-c6wv",
"modified": "2022-05-14T01:29:43Z",
"published": "2022-05-14T01:29:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-6116"
},
{
"type": "WEB",
"url": "https://access.redhat.com/errata/RHSA-2018:1195"
},
{
"type": "WEB",
"url": "https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html"
},
{
"type": "WEB",
"url": "https://crbug.com/822266"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/201804-22"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2018/dsa-4182"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/103917"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5H5H-RH47-HQJF
Vulnerability from github – Published: 2022-05-24 16:55 – Updated: 2024-04-04 01:53An issue was discovered in the Linux kernel before 5.0.9. There is a NULL pointer dereference for a pf data structure if alloc_disk fails in drivers/block/paride/pf.c.
{
"affected": [],
"aliases": [
"CVE-2019-15922"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2019-09-04T19:15:00Z",
"severity": "MODERATE"
},
"details": "An issue was discovered in the Linux kernel before 5.0.9. There is a NULL pointer dereference for a pf data structure if alloc_disk fails in drivers/block/paride/pf.c.",
"id": "GHSA-5h5h-rh47-hqjf",
"modified": "2024-04-04T01:53:08Z",
"published": "2022-05-24T16:55:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15922"
},
{
"type": "WEB",
"url": "https://github.com/torvalds/linux/commit/58ccd2d31e502c37e108b285bf3d343eb00c235b"
},
{
"type": "WEB",
"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.9"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20191004-0001"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5H6W-MMCG-HF8J
Vulnerability from github – Published: 2025-10-04 18:31 – Updated: 2026-02-06 15:30In the Linux kernel, the following vulnerability has been resolved:
null_blk: Always check queue mode setting from configfs
Make sure to check device queue mode in the null_validate_conf() and return error for NULL_Q_RQ as we don't allow legacy I/O path, without this patch we get OOPs when queue mode is set to 1 from configfs, following are repro steps :-
modprobe null_blk nr_devices=0 mkdir config/nullb/nullb0 echo 1 > config/nullb/nullb0/memory_backed echo 4096 > config/nullb/nullb0/blocksize echo 20480 > config/nullb/nullb0/size echo 1 > config/nullb/nullb0/queue_mode echo 1 > config/nullb/nullb0/power
Entering kdb (current=0xffff88810acdd080, pid 2372) on processor 42 Oops: (null) due to oops @ 0xffffffffc041c329 CPU: 42 PID: 2372 Comm: sh Tainted: G O N 6.3.0-rc5lblk+ #5 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:null_add_dev.part.0+0xd9/0x720 [null_blk] Code: 01 00 00 85 d2 0f 85 a1 03 00 00 48 83 bb 08 01 00 00 00 0f 85 f7 03 00 00 80 bb 62 01 00 00 00 48 8b 75 20 0f 85 6d 02 00 00 <48> 89 6e 60 48 8b 75 20 bf 06 00 00 00 e8 f5 37 2c c1 48 8b 75 20 RSP: 0018:ffffc900052cbde0 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff88811084d800 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888100042e00 RBP: ffff8881053d8200 R08: ffffc900052cbd68 R09: ffff888105db2000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002 R13: ffff888104765200 R14: ffff88810eec1748 R15: ffff88810eec1740 FS: 00007fd445fd1740(0000) GS:ffff8897dfc80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000060 CR3: 0000000166a00000 CR4: 0000000000350ee0 DR0: ffffffff8437a488 DR1: ffffffff8437a489 DR2: ffffffff8437a48a DR3: ffffffff8437a48b DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: nullb_device_power_store+0xd1/0x120 [null_blk] configfs_write_iter+0xb4/0x120 vfs_write+0x2ba/0x3c0 ksys_write+0x5f/0xe0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7fd4460c57a7 Code: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 RSP: 002b:00007ffd3792a4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd4460c57a7 RDX: 0000000000000002 RSI: 000055b43c02e4c0 RDI: 0000000000000001 RBP: 000055b43c02e4c0 R08: 000000000000000a R09: 00007fd44615b4e0 R10: 00007fd44615b3e0 R11: 0000000000000246 R12: 0000000000000002 R13: 00007fd446198520 R14: 0000000000000002 R15: 00007fd446198700
{
"affected": [],
"aliases": [
"CVE-2023-53576"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-04T16:15:53Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnull_blk: Always check queue mode setting from configfs\n\nMake sure to check device queue mode in the null_validate_conf() and\nreturn error for NULL_Q_RQ as we don\u0027t allow legacy I/O path, without\nthis patch we get OOPs when queue mode is set to 1 from configfs,\nfollowing are repro steps :-\n\nmodprobe null_blk nr_devices=0\nmkdir config/nullb/nullb0\necho 1 \u003e config/nullb/nullb0/memory_backed\necho 4096 \u003e config/nullb/nullb0/blocksize\necho 20480 \u003e config/nullb/nullb0/size\necho 1 \u003e config/nullb/nullb0/queue_mode\necho 1 \u003e config/nullb/nullb0/power\n\nEntering kdb (current=0xffff88810acdd080, pid 2372) on processor 42 Oops: (null)\ndue to oops @ 0xffffffffc041c329\nCPU: 42 PID: 2372 Comm: sh Tainted: G O N 6.3.0-rc5lblk+ #5\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\nRIP: 0010:null_add_dev.part.0+0xd9/0x720 [null_blk]\nCode: 01 00 00 85 d2 0f 85 a1 03 00 00 48 83 bb 08 01 00 00 00 0f 85 f7 03 00 00 80 bb 62 01 00 00 00 48 8b 75 20 0f 85 6d 02 00 00 \u003c48\u003e 89 6e 60 48 8b 75 20 bf 06 00 00 00 e8 f5 37 2c c1 48 8b 75 20\nRSP: 0018:ffffc900052cbde0 EFLAGS: 00010246\nRAX: 0000000000000001 RBX: ffff88811084d800 RCX: 0000000000000001\nRDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888100042e00\nRBP: ffff8881053d8200 R08: ffffc900052cbd68 R09: ffff888105db2000\nR10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002\nR13: ffff888104765200 R14: ffff88810eec1748 R15: ffff88810eec1740\nFS: 00007fd445fd1740(0000) GS:ffff8897dfc80000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000000060 CR3: 0000000166a00000 CR4: 0000000000350ee0\nDR0: ffffffff8437a488 DR1: ffffffff8437a489 DR2: ffffffff8437a48a\nDR3: ffffffff8437a48b DR6: 00000000ffff0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n nullb_device_power_store+0xd1/0x120 [null_blk]\n configfs_write_iter+0xb4/0x120\n vfs_write+0x2ba/0x3c0\n ksys_write+0x5f/0xe0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x72/0xdc\nRIP: 0033:0x7fd4460c57a7\nCode: 0d 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24\nRSP: 002b:00007ffd3792a4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\nRAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd4460c57a7\nRDX: 0000000000000002 RSI: 000055b43c02e4c0 RDI: 0000000000000001\nRBP: 000055b43c02e4c0 R08: 000000000000000a R09: 00007fd44615b4e0\nR10: 00007fd44615b3e0 R11: 0000000000000246 R12: 0000000000000002\nR13: 00007fd446198520 R14: 0000000000000002 R15: 00007fd446198700\n \u003c/TASK\u003e",
"id": "GHSA-5h6w-mmcg-hf8j",
"modified": "2026-02-06T15:30:58Z",
"published": "2025-10-04T18:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53576"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/35e304dbcefa95237a3d6f94c007bfb10f012b17"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/63f8793ee60513a09f110ea460a6ff2c33811cdb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/651260e563d9f50827dac496dc8a0b9b23d5db1a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e732a266b973cd4e115e2cc2ea5007119e8a7fbc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fd35b7bb6d5a329c427924886949ab51f210200a"
}
],
"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-5H7F-C7RW-MRCQ
Vulnerability from github – Published: 2024-09-27 12:31 – Updated: 2024-09-27 12:31Input validation vulnerability in the USB service module Impact: Successful exploitation of this vulnerability may affect availability.
{
"affected": [],
"aliases": [
"CVE-2024-47290"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-27T11:15:11Z",
"severity": "MODERATE"
},
"details": "Input validation vulnerability in the USB service module\nImpact: Successful exploitation of this vulnerability may affect availability.",
"id": "GHSA-5h7f-c7rw-mrcq",
"modified": "2024-09-27T12:31:39Z",
"published": "2024-09-27T12:31:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47290"
},
{
"type": "WEB",
"url": "https://consumer.huawei.com/en/support/bulletin/2024/10"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-5H7H-63PX-44W7
Vulnerability from github – Published: 2022-05-24 19:08 – Updated: 2022-05-24 19:08An issue has been found in function EmbedStream::getChar in PDF2JSON 0.70 that allows attackers to cause a Denial of Service due to a null pointer derefenrece (invalid read of size 8) .
{
"affected": [],
"aliases": [
"CVE-2020-19468"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2021-07-21T18:15:00Z",
"severity": "MODERATE"
},
"details": "An issue has been found in function EmbedStream::getChar in PDF2JSON 0.70 that allows attackers to cause a Denial of Service due to a null pointer derefenrece (invalid read of size 8) .",
"id": "GHSA-5h7h-63px-44w7",
"modified": "2022-05-24T19:08:33Z",
"published": "2022-05-24T19:08:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-19468"
},
{
"type": "WEB",
"url": "https://github.com/flexpaper/pdf2json/issues/29"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-5H89-MF56-355J
Vulnerability from github – Published: 2025-06-08 12:30 – Updated: 2025-06-08 12:30in OpenHarmony v5.0.3 and prior versions allow a local attacker case DOS through NULL pointer dereference.
{
"affected": [],
"aliases": [
"CVE-2025-25217"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-06-08T12:15:21Z",
"severity": "LOW"
},
"details": "in OpenHarmony v5.0.3 and prior versions allow a local attacker case DOS through NULL pointer dereference.",
"id": "GHSA-5h89-mf56-355j",
"modified": "2025-06-08T12:30:33Z",
"published": "2025-06-08T12:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-25217"
},
{
"type": "WEB",
"url": "https://gitee.com/openharmony/security/blob/master/zh/security-disclosure/2025/2025-06.md"
}
],
"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:L",
"type": "CVSS_V3"
}
]
}
GHSA-5H99-7732-G93R
Vulnerability from github – Published: 2026-04-22 12:30 – Updated: 2026-04-22 12:30If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
{
"affected": [],
"aliases": [
"CVE-2026-33601"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-22T10:16:52Z",
"severity": "MODERATE"
},
"details": "If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.",
"id": "GHSA-5h99-7732-g93r",
"modified": "2026-04-22T12:30:30Z",
"published": "2026-04-22T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33601"
},
{
"type": "WEB",
"url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/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.