CVE-2022-50093 (GCVE-0-2022-50093)
Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-05-11 19:12
VLAI
EPSS
VEX
Title
iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)
Summary
In the Linux kernel, the following vulnerability has been resolved:
iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)
KASAN reports:
[ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)
[ 4.676149][ T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0
[ 4.683454][ T0]
[ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1
[ 4.694331][ T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016
[ 4.703196][ T0] Call Trace:
[ 4.706334][ T0] <TASK>
[ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)
after converting the type of the first argument (@nr, bit number)
of arch_test_bit() from `long` to `unsigned long`[0].
Under certain conditions (for example, when ACPI NUMA is disabled
via command line), pxm_to_node() can return %NUMA_NO_NODE (-1).
It is valid 'magic' number of NUMA node, but not valid bit number
to use in bitops.
node_online() eventually descends to test_bit() without checking
for the input, assuming it's on caller side (which might be good
for perf-critical tasks). There, -1 becomes %ULONG_MAX which leads
to an insane array index when calculating bit position in memory.
For now, add an explicit check for @node being not %NUMA_NO_NODE
before calling test_bit(). The actual logics didn't change here
at all.
[0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d
Severity
7.1 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
ee34b32d8c2950f66038c8975747ef9aec855289 , < b12304984654d8e58a2b22ff94c4410906d6267f
(git)
Affected: ee34b32d8c2950f66038c8975747ef9aec855289 , < 5659efdadf04b56707d58c1b758df16d2e0eff2c (git) Affected: ee34b32d8c2950f66038c8975747ef9aec855289 , < 0b4c0003aeda32a600f95df53b2848da8a5aa3fa (git) Affected: ee34b32d8c2950f66038c8975747ef9aec855289 , < 73ce2046e04ad488cecc66757c36cbe1bdf089d4 (git) Affected: ee34b32d8c2950f66038c8975747ef9aec855289 , < c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa (git) Affected: ee34b32d8c2950f66038c8975747ef9aec855289 , < b0b0b77ea611e3088e9523e60860f4f41b62b235 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.33
Unaffected: 0 , < 2.6.33 (semver) Unaffected: 5.4.211 , ≤ 5.4.* (semver) Unaffected: 5.10.137 , ≤ 5.10.* (semver) Unaffected: 5.15.61 , ≤ 5.15.* (semver) Unaffected: 5.18.18 , ≤ 5.18.* (semver) Unaffected: 5.19.2 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix) |
guessed |
{
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},
{
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},
{
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"version": "5.18.18",
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},
{
"lessThanOrEqual": "5.19.*",
"status": "unaffected",
"version": "5.19.2",
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},
{
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"version": "6.0",
"versionType": "original_commit_for_fix"
}
]
}
],
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)\n\nKASAN reports:\n\n[ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\n[ 4.676149][ T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0\n[ 4.683454][ T0]\n[ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1\n[ 4.694331][ T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016\n[ 4.703196][ T0] Call Trace:\n[ 4.706334][ T0] \u003cTASK\u003e\n[ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\n\nafter converting the type of the first argument (@nr, bit number)\nof arch_test_bit() from `long` to `unsigned long`[0].\n\nUnder certain conditions (for example, when ACPI NUMA is disabled\nvia command line), pxm_to_node() can return %NUMA_NO_NODE (-1).\nIt is valid \u0027magic\u0027 number of NUMA node, but not valid bit number\nto use in bitops.\nnode_online() eventually descends to test_bit() without checking\nfor the input, assuming it\u0027s on caller side (which might be good\nfor perf-critical tasks). There, -1 becomes %ULONG_MAX which leads\nto an insane array index when calculating bit position in memory.\n\nFor now, add an explicit check for @node being not %NUMA_NO_NODE\nbefore calling test_bit(). The actual logics didn\u0027t change here\nat all.\n\n[0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d"
}
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{
"url": "https://git.kernel.org/stable/c/73ce2046e04ad488cecc66757c36cbe1bdf089d4"
},
{
"url": "https://git.kernel.org/stable/c/c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa"
},
{
"url": "https://git.kernel.org/stable/c/b0b0b77ea611e3088e9523e60860f4f41b62b235"
}
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"title": "iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)",
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"assignerShortName": "Linux",
"cveId": "CVE-2022-50093",
"datePublished": "2025-06-18T11:02:31.966Z",
"dateReserved": "2025-06-18T10:57:27.411Z",
"dateUpdated": "2026-05-11T19:12:41.727Z",
"state": "PUBLISHED"
},
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"vulnerability-lookup:meta": {
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"cve": "CVE-2022-50093",
"date": "2026-09-16",
"epss": "0.00236",
"percentile": "0.14759"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2022-50093\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:38.497\",\"lastModified\":\"2026-06-17T05:22:44.743\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)\\n\\nKASAN reports:\\n\\n[ 4.668325][ T0] BUG: KASAN: wild-memory-access in dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\\n[ 4.676149][ T0] Read of size 8 at addr 1fffffff85115558 by task swapper/0/0\\n[ 4.683454][ T0]\\n[ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.19.0-rc3-00004-g0e862838f290 #1\\n[ 4.694331][ T0] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016\\n[ 4.703196][ T0] Call Trace:\\n[ 4.706334][ T0] \u003cTASK\u003e\\n[ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497)\\n\\nafter converting the type of the first argument (@nr, bit number)\\nof arch_test_bit() from `long` to `unsigned long`[0].\\n\\nUnder certain conditions (for example, when ACPI NUMA is disabled\\nvia command line), pxm_to_node() can return %NUMA_NO_NODE (-1).\\nIt is valid \u0027magic\u0027 number of NUMA node, but not valid bit number\\nto use in bitops.\\nnode_online() eventually descends to test_bit() without checking\\nfor the input, assuming it\u0027s on caller side (which might be good\\nfor perf-critical tasks). There, -1 becomes %ULONG_MAX which leads\\nto an insane array index when calculating bit position in memory.\\n\\nFor now, add an explicit check for @node being not %NUMA_NO_NODE\\nbefore calling test_bit(). The actual logics didn\u0027t change here\\nat all.\\n\\n[0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: iommu/vt-d: evitar acceso no v\u00e1lido a memoria mediante node_online(NUMA_NO_NODE) KASAN informa: [ 4.668325][ T0] ERROR: KASAN: acceso a memoria salvaje en dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497) [ 4.676149][ T0] Lectura de tama\u00f1o 8 en la direcci\u00f3n 1fffffff85115558 por el intercambiador de tareas/0/0 [ 4.683454][ T0] [ 4.685638][ T0] CPU: 0 PID: 0 Comm: swapper/0 No contaminado 5.19.0-rc3-00004-g0e862838f290 #1 [ 4.694331][ T0] Nombre del hardware: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 02/03/2016 [ 4.703196][ T0] Rastreo de llamadas: [ 4.706334][ T0] [ 4.709133][ T0] ? dmar_parse_one_rhsa (arch/x86/include/asm/bitops.h:214 arch/x86/include/asm/bitops.h:226 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/nodemask.h:415 drivers/iommu/intel/dmar.c:497) despu\u00e9s de convertir el tipo del primer argumento (@nr, n\u00famero de bit) de arch_test_bit() de `long` a `unsigned long`[0]. Bajo ciertas condiciones (por ejemplo, cuando ACPI NUMA est\u00e1 deshabilitado a trav\u00e9s de la l\u00ednea de comandos), pxm_to_node() puede devolver %NUMA_NO_NODE (-1). Es un n\u00famero \u0027m\u00e1gico\u0027 v\u00e1lido de nodo NUMA, pero no un n\u00famero de bit v\u00e1lido para usar en bitops. node_online() finalmente desciende a test_bit() sin verificar la entrada, asumiendo que est\u00e1 del lado del llamador (lo cual podr\u00eda ser \u00fatil para tareas cr\u00edticas para el rendimiento). All\u00ed, -1 se convierte en %ULONG_MAX, lo que genera un \u00edndice de matriz desproporcionado al calcular la posici\u00f3n del bit en memoria. Por ahora, agregue una verificaci\u00f3n expl\u00edcita de que @node no sea %NUMA_NO_NODE antes de llamar a test_bit(). La l\u00f3gica real no cambi\u00f3 en absoluto. [0] https://github.com/norov/linux/commit/0e862838f290147ea9c16db852d8d494b552d38d\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/iommu/intel/dmar.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"b12304984654d8e58a2b22ff94c4410906d6267f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"5659efdadf04b56707d58c1b758df16d2e0eff2c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"0b4c0003aeda32a600f95df53b2848da8a5aa3fa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"73ce2046e04ad488cecc66757c36cbe1bdf089d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"c2304c50f4d94f56c2e326f25c9dc8cf2ba6f5fa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ee34b32d8c2950f66038c8975747ef9aec855289\",\"lessThan\":\"b0b0b77ea611e3088e9523e60860f4f41b62b235\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/iommu/intel/dmar.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.33\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.33\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.211\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.137\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.61\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.18\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19.2\",\"lessThanOrEqual\":\"5.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.33\",\"versionEndExcluding\":\"5.4.211\",\"matchCriteriaId\":\"52DD05C0-6039-4C3B-AA9B-4FC12B72BCEB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.137\",\"matchCriteriaId\":\"C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.61\",\"matchCriteriaId\":\"51861563-7F40-460F-82CD-2D3FBDAD6618\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.18\",\"matchCriteriaId\":\"5B42E453-8837-49D0-A5EF-03F818A6DC11\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"5.19.2\",\"matchCriteriaId\":\"A1A2A5A5-4598-4D7E-BA07-4660398D6C8F\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b4c0003aeda32a600f95df53b2848da8a5aa3fa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5659efdadf04b56707d58c1b758df16d2e0eff2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/73ce2046e04ad488cecc66757c36cbe1bdf089d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b0b0b77ea611e3088e9523e60860f4f41b62b235\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b12304984654d8e58a2b22ff94c4410906d6267f\",\"source\":\"416baaa9-dc9f-4396-8d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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T21:39:20+00:00",
"cve": "CVE-2022-50093",
"id": "CVE-2022-50093",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "321",
"product_status:known_affected": "80",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: iommu/vt-d: avoid invalid memory access via node_online(NUMA_NO_NODE)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50093.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-08-31T01:26:30Z",
"cve": "CVE-2022-50093",
"id": "CVE-2022-50093",
"initial_release_date": "2025-06-19T03:42:07Z",
"product_status:known_affected": "497",
"product_status:known_not_affected": "243",
"product_status:recommended": "357",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-50093",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50093.json",
"version": "65"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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