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CERTFR-2026-AVI-1302
Vulnerability from certfr_avis - Published: 2026-10-14 - Updated: 2026-10-14
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire, une élévation de privilèges et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen toutes versions sans les derniers correctifs de s\u00e9curit\u00e9",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-79611",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79611"
},
{
"name": "CVE-2023-34321",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-34321"
},
{
"name": "CVE-2026-102700",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102700"
},
{
"name": "CVE-2026-79608",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79608"
},
{
"name": "CVE-2026-79609",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79609"
},
{
"name": "CVE-2026-79610",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79610"
},
{
"name": "CVE-2023-20593",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-20593"
},
{
"name": "CVE-2017-14318",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-14318"
},
{
"name": "CVE-2017-5754",
"url": "https://www.cve.org/CVERecord?id=CVE-2017-5754"
},
{
"name": "CVE-2026-79607",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-79607"
},
{
"name": "CVE-2026-102701",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102701"
},
{
"name": "CVE-2026-102702",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102702"
},
{
"name": "CVE-2026-102699",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102699"
}
],
"initial_release_date": "2026-10-14T00:00:00",
"last_revision_date": "2026-10-14T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1302",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-10-14T00:00:00.000000"
}
],
"risks": [
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "D\u00e9ni de service"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire, une \u00e9l\u00e9vation de privil\u00e8ges et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-520",
"url": "https://xenbits.xen.org/xsa/advisory-520.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-515",
"url": "https://xenbits.xen.org/xsa/advisory-515.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-518",
"url": "https://xenbits.xen.org/xsa/advisory-518.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-516",
"url": "https://xenbits.xen.org/xsa/advisory-516.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-514",
"url": "https://xenbits.xen.org/xsa/advisory-514.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-517",
"url": "https://xenbits.xen.org/xsa/advisory-517.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-519",
"url": "https://xenbits.xen.org/xsa/advisory-519.html"
},
{
"published_at": "2026-10-13",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-521",
"url": "https://xenbits.xen.org/xsa/advisory-521.html"
}
]
}
CVE-2017-14318 (GCVE-0-2017-14318)
Vulnerability from cvelistv5 – Published: 2017-09-12 15:00 – Updated: 2024-08-05 19:20
VLAI
EPSS
VEX
Summary
An issue was discovered in Xen 4.5.x through 4.9.x. The function `__gnttab_cache_flush` handles GNTTABOP_cache_flush grant table operations. It checks to see if the calling domain is the owner of the page that is to be operated on. If it is not, the owner's grant table is checked to see if a grant mapping to the calling domain exists for the page in question. However, the function does not check to see if the owning domain actually has a grant table or not. Some special domains, such as `DOMID_XEN`, `DOMID_IO` and `DOMID_COW` are created without grant tables. Hence, if __gnttab_cache_flush operates on a page owned by these special domains, it will attempt to dereference a NULL pointer in the domain struct.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://support.citrix.com/article/CTX227185 | x_refsource_CONFIRM |
| https://www.debian.org/security/2017/dsa-4050 | vendor-advisoryx_refsource_DEBIAN |
| http://www.securitytracker.com/id/1039349 | vdb-entryx_refsource_SECTRACK |
| http://xenbits.xen.org/xsa/advisory-232.html | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/100817 | vdb-entryx_refsource_BID |
Date Public
2017-09-12 00:00
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CVE-2017-5754 (GCVE-0-2017-5754)
Vulnerability from cvelistv5 – Published: 2018-01-04 13:00 – Updated: 2026-05-28 17:53
VLAI
EPSS
VEX
Summary
Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache.
Severity
5.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 17:52 UTC
CWE
- Information Disclosure
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
66 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Intel Corporation | Most Modern Operating Systems |
Affected:
All
|
Date Public
2018-01-03 00:00
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"url": "https://cert.vde.com/en-us/advisories/vde-2018-002"
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"url": "http://xenbits.xen.org/xsa/advisory-254.html"
},
{
"tags": [
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"x_transferred"
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"url": "https://security.netapp.com/advisory/ntap-20180104-0001/"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://www.synology.com/support/security/Synology_SA_18_01"
},
{
"tags": [
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"x_transferred"
],
"url": "http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-001.txt"
},
{
"tags": [
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"x_transferred"
],
"url": "https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability"
},
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"x_transferred"
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"url": "https://usn.ubuntu.com/usn/usn-3522-2/"
},
{
"name": "VU#180049",
"tags": [
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"x_refsource_CERT-VN",
"x_transferred"
],
"url": "https://www.kb.cert.org/vuls/id/180049"
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"tags": [
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"x_transferred"
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"url": "https://usn.ubuntu.com/3583-1/"
},
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"x_transferred"
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CVE-2023-20593 (GCVE-0-2023-20593)
Vulnerability from cvelistv5 – Published: 2023-07-24 19:38 – Updated: 2025-02-13 16:39
VLAI
EPSS
VEX
Summary
An issue in “Zen 2” CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information.
Severity
No CVSS data available.
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-19 16:07 UTC
CWE
- CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
35 references
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| AMD | Ryzen™ 3000 Series Desktop Processors “Matisse” AM4 |
Affected:
various
|
|
| AMD | AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics “Renoir” AM4 |
Affected:
various
|
|
| AMD | 3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT |
Affected:
various
|
|
| AMD | Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS SP3 |
Affected:
various
|
|
| AMD | Ryzen™ 5000 Series Mobile processors with Radeon™ Graphics “Lucienne” |
Affected:
various
|
|
| AMD | Ryzen™ 4000 Series Mobile processors with Radeon™ Graphics “Renoir” |
Affected:
various
|
|
| AMD | Ryzen™ 7020 Series processors “Mendocino” FT6 |
Affected:
various
|
|
| AMD | 2nd Gen AMD EPYC™ Processors |
Affected:
various
|
Date Public
2023-07-24 19:00
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CVE-2023-34321 (GCVE-0-2023-34321)
Vulnerability from cvelistv5 – Published: 2024-01-05 16:17 – Updated: 2025-11-04 19:16
VLAI
EPSS
VEX
Title
arm32: The cache may not be properly cleaned/invalidated
Summary
Arm provides multiple helpers to clean & invalidate the cache
for a given region. This is, for instance, used when allocating
guest memory to ensure any writes (such as the ones during scrubbing)
have reached memory before handing over the page to a guest.
Unfortunately, the arithmetics in the helpers can overflow and would
then result to skip the cache cleaning/invalidation. Therefore there
is no guarantee when all the writes will reach the memory.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-01-09 15:52 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Date Public
2023-09-05 07:03
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CVE-2026-102699 (GCVE-0-2026-102699)
Vulnerability from cvelistv5 – Published: 2026-10-13 15:45 – Updated: 2026-10-13 15:45
VLAI
EPSS
VEX
Title
Arm: multiple issues with GNTTABOP_cache_flush
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
1) XSA-437 (CVE-2023-34321) addressed issues with overflows in
calculations involved in guests flushing caches through
GNTTABOP_cache_flush. Unfortunately the fix there introduced a
calculation which may underflow, resulting in a loop which would - at
least on 64-bit Arm - take excessively long, and which would likely
eventually crash the hypervisor.
This is CVE-2026-102699.
2) GNTTABOP_cache_flush may be issued on memory mapped from another
domain using the grant table interface. However there was no
restriction to disallow the use of invalidate-without-clean against
read-only grant mappings, which may corrupt the granted memory.
This is CVE-2026-102702.
Severity
No CVSS data available.
Assigner
References
1 reference
Date Public
2026-10-13 12:00
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CVE-2026-102700 (GCVE-0-2026-102700)
Vulnerability from cvelistv5 – Published: 2026-10-13 15:45 – Updated: 2026-10-13 16:11
VLAI
EPSS
VEX
Title
gnttab: cache-flush handling may cause page reference leak
Summary
With its original introduction, GNTTAB_cache_flush was made available
uniformly. XSA-232 (CVE-2017-14318) then covered an omitted NULL
pointer check, yet the addition of that check failed to adjust the
subsequent error path. That error path fails to drop a page reference in
case the specified page is owned by a special system domain (DOM_IO and
DOM_COW are system domains which can have memory pages assigned to them.)
Severity
No CVSS data available.
Assigner
References
Date Public
2026-10-13 12:00
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CVE-2026-102702 (GCVE-0-2026-102702)
Vulnerability from cvelistv5 – Published: 2026-10-13 15:45 – Updated: 2026-10-13 15:45
VLAI
EPSS
VEX
Title
Arm: multiple issues with GNTTABOP_cache_flush
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
1) XSA-437 (CVE-2023-34321) addressed issues with overflows in
calculations involved in guests flushing caches through
GNTTABOP_cache_flush. Unfortunately the fix there introduced a
calculation which may underflow, resulting in a loop which would - at
least on 64-bit Arm - take excessively long, and which would likely
eventually crash the hypervisor.
This is CVE-2026-102699.
2) GNTTABOP_cache_flush may be issued on memory mapped from another
domain using the grant table interface. However there was no
restriction to disallow the use of invalidate-without-clean against
read-only grant mappings, which may corrupt the granted memory.
This is CVE-2026-102702.
Severity
No CVSS data available.
Assigner
References
1 reference
Date Public
2026-10-13 12:00
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}
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CVE-2026-79607 (GCVE-0-2026-79607)
Vulnerability from cvelistv5 – Published: 2026-10-13 15:43 – Updated: 2026-10-13 16:13
VLAI
EPSS
VEX
Title
Xenstore: Guests can crash xenstored during Live Update
Summary
During Xenstore live update the state record for a Xenstore watch with
specified watch depth is written with two bytes missing. This results
in an inconsistent state when reading the state back in the new Xenstore,
causing a crash of Xenstore or wrong Xenstore data.
Severity
No CVSS data available.
Assigner
References
Date Public
2026-10-13 12:00
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],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-514"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Only systems running Xen 4.22 are vulnerable. Systems running Xen 4.21\nor older are not vulnerable.\n\nOnly systems running C xenstore either as daemon or as stubdom are\nvulnerable. Systems running oxenstored are not vulnerable."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Andrii Sultanov of Vates."
}
],
"datePublic": "2026-10-13T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "During Xenstore live update the state record for a Xenstore watch with\nspecified watch depth is written with two bytes missing. This results\nin an inconsistent state when reading the state back in the new Xenstore,\ncausing a crash of Xenstore or wrong Xenstore data."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "An unprivileged guest can cause the Xenstore service to crash or to get\ncorrupted during a live update of Xenstore, causing a DoS of the host\nregarding further domain administration actions."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T15:43:43.425Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-514.html"
}
],
"title": "Xenstore: Guests can crash xenstored during Live Update",
"workarounds": [
{
"lang": "en",
"value": "Not doing a live update of Xenstore avoids the vulnerability.\n\nSwitching to oxenstored avoids the vulnerability."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-79607",
"datePublished": "2026-10-13T15:43:43.425Z",
"dateReserved": "2026-08-25T07:35:05.289Z",
"dateUpdated": "2026-10-13T16:13:38.746Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-79608 (GCVE-0-2026-79608)
Vulnerability from cvelistv5 – Published: 2026-10-13 15:44 – Updated: 2026-10-13 16:13
VLAI
EPSS
VEX
Title
x86/AMD: ineffectual Zenbleed workaround
Summary
The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later
re-worked to better integrate with other manipulations of the same MSR.
In this rework an inverted conditional was introduced, resulting in the
workaround to not be applied when needed and vice versa.
For more details, see:
http://xenbits.xen.org/xsa/advisory-433.html
Severity
No CVSS data available.
Assigner
References
Date Public
2026-10-13 12:00
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-10-13T16:13:41.507Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-515.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-515"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Xen versions 4.19.4 and onwards, 4.20.3 and onwards, 4.21.1 and onwards,\nand 4.22 are affected. Xen versions 4.18, minor versions 4.19.3 and\nearlier, minor versions 4.20.2 and earlier, and 4.21.0 are not affected.\n\nThe vulnerability can only be leveraged on systems running out-of-date\nmicrocode. Microcode fixing Zenbleed was published in late 2023.\nUpdated firmware subseqeuent to this, or e.g. updated amd-ucode from\nlinux-firmware (for the subset of CPUs covered by linux-firmware) are\nnot vulnerable.\n\nThe original issue and hence the applicability of the workaround is\nspecific to the AMD Zen2 microarchitecture. AMD do not believe that\nother microarchitectures are affected."
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "This issue was discovered by Sashiko + Opus 5.0 and diagnosed as a\nsecurity issue by George Dunlap."
}
],
"datePublic": "2026-10-13T12:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later\nre-worked to better integrate with other manipulations of the same MSR.\nIn this rework an inverted conditional was introduced, resulting in the\nworkaround to not be applied when needed and vice versa.\n\nFor more details, see:\n http://xenbits.xen.org/xsa/advisory-433.html"
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "An attacker can exploit this bug to read data from different contexts on\nthe same core. Examples of such data includes key material, cypher and\nplaintext from the AES-NI instructions, or the contents of REP-MOVS\ninstructions, commonly used to implement memcpy()."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-13T15:44:08.729Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-515.html"
}
],
"title": "x86/AMD: ineffectual Zenbleed workaround",
"workarounds": [
{
"lang": "en",
"value": "This issue can be mitigated by disabling AVX, either by booting Xen with\n`cpuid=no-avx` on the command line, or by specifying `cpuid=\"host:avx=0\"` in\nthe vm.cfg file of all untrusted VMs. However, this will come with a\nsignificant impact on the system and is not recommended for anyone able to\ndeploy the microcode or patch described below."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-79608",
"datePublished": "2026-10-13T15:44:08.729Z",
"dateReserved": "2026-08-25T07:35:05.289Z",
"dateUpdated": "2026-10-13T16:13:41.507Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
Vulnerability timeline
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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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