CWE-476
AllowedNULL Pointer Dereference
Abstraction: Base · Status: Stable
The product dereferences a pointer that it expects to be valid but is NULL.
6314 vulnerabilities reference this CWE, most recent first.
GHSA-7XQF-4P6F-W78M
Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-02-03 18:30In the Linux kernel, the following vulnerability has been resolved:
drivers/perf: hisi: use cpuhp_state_remove_instance_nocalls() for hisi_hns3_pmu uninit process
When tearing down a 'hisi_hns3' PMU, we mistakenly run the CPU hotplug callbacks after the device has been unregistered, leading to fireworks when we try to execute empty function callbacks within the driver:
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | CPU: 0 PID: 15 Comm: cpuhp/0 Tainted: G W O 5.12.0-rc4+ #1 | Hardware name: , BIOS KpxxxFPGA 1P B600 V143 04/22/2021 | pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--) | pc : perf_pmu_migrate_context+0x98/0x38c | lr : perf_pmu_migrate_context+0x94/0x38c | | Call trace: | perf_pmu_migrate_context+0x98/0x38c | hisi_hns3_pmu_offline_cpu+0x104/0x12c [hisi_hns3_pmu]
Use cpuhp_state_remove_instance_nocalls() instead of cpuhp_state_remove_instance() so that the notifiers don't execute after the PMU device has been unregistered.
[will: Rewrote commit message]
{
"affected": [],
"aliases": [
"CVE-2023-52860"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T16:15:23Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers/perf: hisi: use cpuhp_state_remove_instance_nocalls() for hisi_hns3_pmu uninit process\n\nWhen tearing down a \u0027hisi_hns3\u0027 PMU, we mistakenly run the CPU hotplug\ncallbacks after the device has been unregistered, leading to fireworks\nwhen we try to execute empty function callbacks within the driver:\n\n | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n | CPU: 0 PID: 15 Comm: cpuhp/0 Tainted: G W O 5.12.0-rc4+ #1\n | Hardware name: , BIOS KpxxxFPGA 1P B600 V143 04/22/2021\n | pstate: 80400009 (Nzcv daif +PAN -UAO -TCO BTYPE=--)\n | pc : perf_pmu_migrate_context+0x98/0x38c\n | lr : perf_pmu_migrate_context+0x94/0x38c\n |\n | Call trace:\n | perf_pmu_migrate_context+0x98/0x38c\n | hisi_hns3_pmu_offline_cpu+0x104/0x12c [hisi_hns3_pmu]\n\nUse cpuhp_state_remove_instance_nocalls() instead of\ncpuhp_state_remove_instance() so that the notifiers don\u0027t execute after\nthe PMU device has been unregistered.\n\n[will: Rewrote commit message]",
"id": "GHSA-7xqf-4p6f-w78m",
"modified": "2025-02-03T18:30:37Z",
"published": "2024-05-21T18:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52860"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3f5827371763f2d9c70719c270055a81d030f3d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4589403a343bb0c72a6faf5898386ff964d4e01a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/50b560783f7f71790bcf70e9e9855155fb0af8c1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d04ff5437a45f275db5530efb49b68d0ec851f6f"
}
],
"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-7XR9-9G9P-XMFP
Vulnerability from github – Published: 2022-01-26 00:01 – Updated: 2026-04-24 15:32In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.
{
"affected": [],
"aliases": [
"CVE-2021-45340"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-01-25T12:15:00Z",
"severity": "MODERATE"
},
"details": "In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.",
"id": "GHSA-7xr9-9g9p-xmfp",
"modified": "2026-04-24T15:32:17Z",
"published": "2022-01-26T00:01:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45340"
},
{
"type": "WEB",
"url": "https://github.com/libsixel/libsixel/issues/51"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-7XW8-H3MG-6X9G
Vulnerability from github – Published: 2022-05-24 17:25 – Updated: 2022-08-25 00:00A null pointer dereference vulnerability in clj_media_size() in devices/gdevclj.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted PDF file. This is fixed in v9.51.
{
"affected": [],
"aliases": [
"CVE-2020-16295"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-08-13T03:15:00Z",
"severity": "MODERATE"
},
"details": "A null pointer dereference vulnerability in clj_media_size() in devices/gdevclj.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted PDF file. This is fixed in v9.51.",
"id": "GHSA-7xw8-h3mg-6x9g",
"modified": "2022-08-25T00:00:26Z",
"published": "2022-05-24T17:25:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-16295"
},
{
"type": "WEB",
"url": "https://bugs.ghostscript.com/show_bug.cgi?id=701796"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/08/msg00032.html"
},
{
"type": "WEB",
"url": "https://security.gentoo.org/glsa/202008-20"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/4469-1"
},
{
"type": "WEB",
"url": "https://www.debian.org/security/2020/dsa-4748"
},
{
"type": "WEB",
"url": "http://git.ghostscript.com/?p=ghostpdl.git;h=2c2dc335c212750e0fb8ae157063bc06cafa8d3e"
}
],
"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-7XWJ-5R4V-429P
Vulnerability from github – Published: 2021-08-25 14:40 – Updated: 2024-11-13 21:15Impact
The implementation of SVDF in TFLite is vulnerable to a null pointer error:
TfLiteTensor* state = GetVariableInput(context, node, kStateTensor);
// ...
GetTensorData<float>(state)
The GetVariableInput function can return a null pointer but GetTensorData assumes that the argument is always a valid tensor.
TfLiteTensor* GetVariableInput(TfLiteContext* context, const TfLiteNode* node,
int index) {
TfLiteTensor* tensor = GetMutableInput(context, node, index);
return tensor->is_variable ? tensor : nullptr;
}
Furthermore, because GetVariableInput calls GetMutableInput which might return nullptr, the tensor->is_variable expression can also trigger a null pointer exception.
Patches
We have patched the issue in GitHub commit 5b048e87e4e55990dae6b547add4dae59f4e1c76.
The fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.
For more information
Please consult our security guide for more information regarding the security model and how to contact us with issues and questions.
Attribution
This vulnerability has been reported by members of the Aivul Team from Qihoo 360.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow"
},
"ranges": [
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"events": [
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"introduced": "2.4.0"
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{
"fixed": "2.4.3"
}
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]
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{
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"ecosystem": "PyPI",
"name": "tensorflow"
},
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"introduced": "2.5.0"
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}
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],
"versions": [
"2.5.0"
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow-cpu"
},
"ranges": [
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"introduced": "0"
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}
],
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"ecosystem": "PyPI",
"name": "tensorflow-cpu"
},
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"introduced": "2.4.0"
},
{
"fixed": "2.4.3"
}
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"name": "tensorflow-cpu"
},
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{
"fixed": "2.5.1"
}
],
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],
"versions": [
"2.5.0"
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow-gpu"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.4"
}
],
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}
]
},
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow-gpu"
},
"ranges": [
{
"events": [
{
"introduced": "2.4.0"
},
{
"fixed": "2.4.3"
}
],
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]
},
{
"package": {
"ecosystem": "PyPI",
"name": "tensorflow-gpu"
},
"ranges": [
{
"events": [
{
"introduced": "2.5.0"
},
{
"fixed": "2.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5.0"
]
}
],
"aliases": [
"CVE-2021-37681"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-24T16:30:14Z",
"nvd_published_at": "2021-08-12T22:15:00Z",
"severity": "HIGH"
},
"details": "### Impact\nThe implementation of SVDF in TFLite is [vulnerable to a null pointer error](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/svdf.cc#L300-L313):\n\n```cc\n TfLiteTensor* state = GetVariableInput(context, node, kStateTensor);\n // ...\n GetTensorData\u003cfloat\u003e(state)\n```\n\nThe [`GetVariableInput` function](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/kernel_util.cc#L115-L119) can return a null pointer but `GetTensorData` assumes that the argument is always a valid tensor.\n\n```cc\nTfLiteTensor* GetVariableInput(TfLiteContext* context, const TfLiteNode* node,\n int index) {\n TfLiteTensor* tensor = GetMutableInput(context, node, index);\n return tensor-\u003eis_variable ? tensor : nullptr;\n}\n```\n\nFurthermore, because `GetVariableInput` calls [`GetMutableInput`](https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/kernel_util.cc#L82-L90) which might return `nullptr`, the `tensor-\u003eis_variable` expression can also trigger a null pointer exception.\n\n### Patches\nWe have patched the issue in GitHub commit [5b048e87e4e55990dae6b547add4dae59f4e1c76](https://github.com/tensorflow/tensorflow/commit/5b048e87e4e55990dae6b547add4dae59f4e1c76).\n\nThe fix will be included in TensorFlow 2.6.0. We will also cherrypick this commit on TensorFlow 2.5.1, TensorFlow 2.4.3, and TensorFlow 2.3.4, as these are also affected and still in supported range.\n\n### For more information\nPlease consult [our security guide](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md) for more information regarding the security model and how to contact us with issues and questions.\n\n### Attribution\nThis vulnerability has been reported by members of the Aivul Team from Qihoo 360.",
"id": "GHSA-7xwj-5r4v-429p",
"modified": "2024-11-13T21:15:58Z",
"published": "2021-08-25T14:40:35Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/tensorflow/tensorflow/security/advisories/GHSA-7xwj-5r4v-429p"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-37681"
},
{
"type": "WEB",
"url": "https://github.com/tensorflow/tensorflow/commit/5b048e87e4e55990dae6b547add4dae59f4e1c76"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-cpu/PYSEC-2021-594.yaml"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow-gpu/PYSEC-2021-792.yaml"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/tensorflow/PYSEC-2021-303.yaml"
},
{
"type": "PACKAGE",
"url": "https://github.com/tensorflow/tensorflow"
},
{
"type": "WEB",
"url": "https://github.com/tensorflow/tensorflow/blob/460e000de3a83278fb00b61a16d161b1964f15f4/tensorflow/lite/kernels/svdf.cc#L300-L313"
}
],
"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"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "NPE in TFLite"
}
GHSA-7XWR-6P6C-H357
Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-03-19 21:30In the Linux kernel, the following vulnerability has been resolved:
arm64/fpsimd: signal: Allocate SSVE storage when restoring ZA
The code to restore a ZA context doesn't attempt to allocate the task's sve_state before setting TIF_SME. Consequently, restoring a ZA context can place a task into an invalid state where TIF_SME is set but the task's sve_state is NULL.
In legitimate but uncommon cases where the ZA signal context was NOT created by the kernel in the context of the same task (e.g. if the task is saved/restored with something like CRIU), we have no guarantee that sve_state had been allocated previously. In these cases, userspace can enter streaming mode without trapping while sve_state is NULL, causing a later NULL pointer dereference when the kernel attempts to store the register state:
| # ./sigreturn-za | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | Mem abort info: | ESR = 0x0000000096000046 | EC = 0x25: DABT (current EL), IL = 32 bits | SET = 0, FnV = 0 | EA = 0, S1PTW = 0 | FSC = 0x06: level 2 translation fault | Data abort info: | ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000 | CM = 0, WnR = 1, TnD = 0, TagAccess = 0 | GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 | user pgtable: 4k pages, 52-bit VAs, pgdp=0000000101f47c00 | [0000000000000000] pgd=08000001021d8403, p4d=0800000102274403, pud=0800000102275403, pmd=0000000000000000 | Internal error: Oops: 0000000096000046 [#1] SMP | Modules linked in: | CPU: 0 UID: 0 PID: 153 Comm: sigreturn-za Not tainted 6.19.0-rc1 #1 PREEMPT | Hardware name: linux,dummy-virt (DT) | pstate: 214000c9 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--) | pc : sve_save_state+0x4/0xf0 | lr : fpsimd_save_user_state+0xb0/0x1c0 | sp : ffff80008070bcc0 | x29: ffff80008070bcc0 x28: fff00000c1ca4c40 x27: 63cfa172fb5cf658 | x26: fff00000c1ca5228 x25: 0000000000000000 x24: 0000000000000000 | x23: 0000000000000000 x22: fff00000c1ca4c40 x21: fff00000c1ca4c40 | x20: 0000000000000020 x19: fff00000ff6900f0 x18: 0000000000000000 | x17: fff05e8e0311f000 x16: 0000000000000000 x15: 028fca8f3bdaf21c | x14: 0000000000000212 x13: fff00000c0209f10 x12: 0000000000000020 | x11: 0000000000200b20 x10: 0000000000000000 x9 : fff00000ff69dcc0 | x8 : 00000000000003f2 x7 : 0000000000000001 x6 : fff00000c1ca5b48 | x5 : fff05e8e0311f000 x4 : 0000000008000000 x3 : 0000000000000000 | x2 : 0000000000000001 x1 : fff00000c1ca5970 x0 : 0000000000000440 | Call trace: | sve_save_state+0x4/0xf0 (P) | fpsimd_thread_switch+0x48/0x198 | __switch_to+0x20/0x1c0 | __schedule+0x36c/0xce0 | schedule+0x34/0x11c | exit_to_user_mode_loop+0x124/0x188 | el0_interrupt+0xc8/0xd8 | __el0_irq_handler_common+0x18/0x24 | el0t_64_irq_handler+0x10/0x1c | el0t_64_irq+0x198/0x19c | Code: 54000040 d51b4408 d65f03c0 d503245f (e5bb5800) | ---[ end trace 0000000000000000 ]---
Fix this by having restore_za_context() ensure that the task's sve_state is allocated, matching what we do when taking an SME trap. Any live SVE/SSVE state (which is restored earlier from a separate signal context) must be preserved, and hence this is not zeroed.
{
"affected": [],
"aliases": [
"CVE-2026-23107"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-04T17:16:21Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64/fpsimd: signal: Allocate SSVE storage when restoring ZA\n\nThe code to restore a ZA context doesn\u0027t attempt to allocate the task\u0027s\nsve_state before setting TIF_SME. Consequently, restoring a ZA context\ncan place a task into an invalid state where TIF_SME is set but the\ntask\u0027s sve_state is NULL.\n\nIn legitimate but uncommon cases where the ZA signal context was NOT\ncreated by the kernel in the context of the same task (e.g. if the task\nis saved/restored with something like CRIU), we have no guarantee that\nsve_state had been allocated previously. In these cases, userspace can\nenter streaming mode without trapping while sve_state is NULL, causing a\nlater NULL pointer dereference when the kernel attempts to store the\nregister state:\n\n| # ./sigreturn-za\n| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n| Mem abort info:\n| ESR = 0x0000000096000046\n| EC = 0x25: DABT (current EL), IL = 32 bits\n| SET = 0, FnV = 0\n| EA = 0, S1PTW = 0\n| FSC = 0x06: level 2 translation fault\n| Data abort info:\n| ISV = 0, ISS = 0x00000046, ISS2 = 0x00000000\n| CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n| GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n| user pgtable: 4k pages, 52-bit VAs, pgdp=0000000101f47c00\n| [0000000000000000] pgd=08000001021d8403, p4d=0800000102274403, pud=0800000102275403, pmd=0000000000000000\n| Internal error: Oops: 0000000096000046 [#1] SMP\n| Modules linked in:\n| CPU: 0 UID: 0 PID: 153 Comm: sigreturn-za Not tainted 6.19.0-rc1 #1 PREEMPT\n| Hardware name: linux,dummy-virt (DT)\n| pstate: 214000c9 (nzCv daIF +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n| pc : sve_save_state+0x4/0xf0\n| lr : fpsimd_save_user_state+0xb0/0x1c0\n| sp : ffff80008070bcc0\n| x29: ffff80008070bcc0 x28: fff00000c1ca4c40 x27: 63cfa172fb5cf658\n| x26: fff00000c1ca5228 x25: 0000000000000000 x24: 0000000000000000\n| x23: 0000000000000000 x22: fff00000c1ca4c40 x21: fff00000c1ca4c40\n| x20: 0000000000000020 x19: fff00000ff6900f0 x18: 0000000000000000\n| x17: fff05e8e0311f000 x16: 0000000000000000 x15: 028fca8f3bdaf21c\n| x14: 0000000000000212 x13: fff00000c0209f10 x12: 0000000000000020\n| x11: 0000000000200b20 x10: 0000000000000000 x9 : fff00000ff69dcc0\n| x8 : 00000000000003f2 x7 : 0000000000000001 x6 : fff00000c1ca5b48\n| x5 : fff05e8e0311f000 x4 : 0000000008000000 x3 : 0000000000000000\n| x2 : 0000000000000001 x1 : fff00000c1ca5970 x0 : 0000000000000440\n| Call trace:\n| sve_save_state+0x4/0xf0 (P)\n| fpsimd_thread_switch+0x48/0x198\n| __switch_to+0x20/0x1c0\n| __schedule+0x36c/0xce0\n| schedule+0x34/0x11c\n| exit_to_user_mode_loop+0x124/0x188\n| el0_interrupt+0xc8/0xd8\n| __el0_irq_handler_common+0x18/0x24\n| el0t_64_irq_handler+0x10/0x1c\n| el0t_64_irq+0x198/0x19c\n| Code: 54000040 d51b4408 d65f03c0 d503245f (e5bb5800)\n| ---[ end trace 0000000000000000 ]---\n\nFix this by having restore_za_context() ensure that the task\u0027s sve_state\nis allocated, matching what we do when taking an SME trap. Any live\nSVE/SSVE state (which is restored earlier from a separate signal\ncontext) must be preserved, and hence this is not zeroed.",
"id": "GHSA-7xwr-6p6c-h357",
"modified": "2026-03-19T21:30:19Z",
"published": "2026-02-04T18:30:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23107"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0af233d66eff90fb8f3e0fc09f2316bba0b72bb9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/19b2c3f3ca1b4b6dccd2a42aca2692d8c79c4214"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/70f7f54566afc23f2c71bf1411af81f5d8009e0f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c5a5b150992ebab779c1ce54f54676786e47e94c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea8ccfddbce0bee6310da4f3fc560ad520f5e6b4"
}
],
"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-7XX2-FW34-H693
Vulnerability from github – Published: 2022-05-14 01:39 – Updated: 2022-05-14 01:39An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.
{
"affected": [],
"aliases": [
"CVE-2018-18883"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-11-01T00:29:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.",
"id": "GHSA-7xx2-fw34-h693",
"modified": "2022-05-14T01:39:15Z",
"published": "2022-05-14T01:39:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-18883"
},
{
"type": "WEB",
"url": "https://xenbits.xen.org/xsa/advisory-278.html"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/105817"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1042021"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-8249-RQX5-QF75
Vulnerability from github – Published: 2025-07-25 15:30 – Updated: 2025-12-23 21:30In the Linux kernel, the following vulnerability has been resolved:
wifi: carl9170: do not ping device which has failed to load firmware
Syzkaller reports [1, 2] crashes caused by an attempts to ping the device which has failed to load firmware. Since such a device doesn't pass 'ieee80211_register_hw()', an internal workqueue managed by 'ieee80211_queue_work()' is not yet created and an attempt to queue work on it causes null-ptr-deref.
[1] https://syzkaller.appspot.com/bug?extid=9a4aec827829942045ff [2] https://syzkaller.appspot.com/bug?extid=0d8afba53e8fb2633217
{
"affected": [],
"aliases": [
"CVE-2025-38420"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-07-25T15:15:26Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: carl9170: do not ping device which has failed to load firmware\n\nSyzkaller reports [1, 2] crashes caused by an attempts to ping\nthe device which has failed to load firmware. Since such a device\ndoesn\u0027t pass \u0027ieee80211_register_hw()\u0027, an internal workqueue\nmanaged by \u0027ieee80211_queue_work()\u0027 is not yet created and an\nattempt to queue work on it causes null-ptr-deref.\n\n[1] https://syzkaller.appspot.com/bug?extid=9a4aec827829942045ff\n[2] https://syzkaller.appspot.com/bug?extid=0d8afba53e8fb2633217",
"id": "GHSA-8249-rqx5-qf75",
"modified": "2025-12-23T21:30:22Z",
"published": "2025-07-25T15:30:54Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38420"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0140d3d37f0f1759d1fdedd854c7875a86e15f8d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/11ef72b3312752c2ff92f3c1e64912be3228ed36"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/15d25307692312cec4b57052da73387f91a2e870"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/301268dbaac8e9013719e162a000202eac8054be"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4e9ab5c48ad5153cc908dd29abad0cd2a92951e4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/527fad1ae32ffa2d4853a1425fe1c8dbb8c9744c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8a3734a6f4c05fd24605148f21fb2066690d61b3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bfeede26e97ce4a15a0b961118de4a0e28c9907a"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
},
{
"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"
}
]
}
GHSA-824G-H3Q7-MX9V
Vulnerability from github – Published: 2022-05-14 03:49 – Updated: 2022-05-14 03:49Exiv2 0.26 has a Null Pointer Dereference in the Exiv2::DataValue::toLong function in value.cpp, related to crafted metadata in a TIFF file.
{
"affected": [],
"aliases": [
"CVE-2017-18005"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-12-31T19:29:00Z",
"severity": "MODERATE"
},
"details": "Exiv2 0.26 has a Null Pointer Dereference in the Exiv2::DataValue::toLong function in value.cpp, related to crafted metadata in a TIFF file.",
"id": "GHSA-824g-h3q7-mx9v",
"modified": "2022-05-14T03:49:57Z",
"published": "2022-05-14T03:49:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-18005"
},
{
"type": "WEB",
"url": "https://github.com/Exiv2/exiv2/issues/168"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2023/01/msg00004.html"
}
],
"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"
}
]
}
GHSA-826Q-WRQ4-P23X
Vulnerability from github – Published: 2026-03-19 17:47 – Updated: 2026-03-25 21:32Summary
Ella Core panics when processing a malformed NGAP LocationReport message with ue-presence-in-area-of-interest event type and omitting the optional UEPresenceInAreaOfInterestList IE.
Impact
An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.
Fix
Added IE presence verification to NGAP message handling.
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/ellanetworks/core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.6.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-33282"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-19T17:47:06Z",
"nvd_published_at": "2026-03-24T00:16:30Z",
"severity": "HIGH"
},
"details": "## Summary\n\nElla Core panics when processing a malformed NGAP LocationReport message with `ue-presence-in-area-of-interest` event type and omitting the optional `UEPresenceInAreaOfInterestList` IE.\n\n## Impact\nAn attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.\n\n## Fix\nAdded IE presence verification to NGAP message handling.",
"id": "GHSA-826q-wrq4-p23x",
"modified": "2026-03-25T21:32:51Z",
"published": "2026-03-19T17:47:06Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/ellanetworks/core/security/advisories/GHSA-826q-wrq4-p23x"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33282"
},
{
"type": "PACKAGE",
"url": "https://github.com/ellanetworks/core"
}
],
"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": "Ella Core panics on malformed NGAP Location Report"
}
GHSA-826W-C3XH-9H43
Vulnerability from github – Published: 2022-05-13 01:17 – Updated: 2025-04-20 03:45ImageMagick 7.0.7-0 Q16 has a NULL Pointer Dereference vulnerability in the function sixel_output_create in coders/sixel.c.
{
"affected": [],
"aliases": [
"CVE-2017-14625"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-09-21T05:29:00Z",
"severity": "CRITICAL"
},
"details": "ImageMagick 7.0.7-0 Q16 has a NULL Pointer Dereference vulnerability in the function sixel_output_create in coders/sixel.c.",
"id": "GHSA-826w-c3xh-9h43",
"modified": "2025-04-20T03:45:36Z",
"published": "2022-05-13T01:17:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-14625"
},
{
"type": "WEB",
"url": "https://github.com/ImageMagick/ImageMagick/issues/721"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2019/05/msg00015.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00007.html"
},
{
"type": "WEB",
"url": "https://usn.ubuntu.com/3681-1"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/100941"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.