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CERTFR-2023-AVI-0599
Vulnerability from certfr_avis - Published: 2023-07-28 - Updated: 2023-07-28
De multiples vulnérabilités ont été découvertes dans le noyau Linux d'Ubuntu. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, une exécution de code arbitraire et une atteinte à la confidentialité des données.
Solution
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
NoneImpacted products
References
| Title | Publication Time | Tags | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Ubuntu 16.04 ESM",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 18.04 ESM",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 20.04 LTS",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 23.04",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 14.04 ESM",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
},
{
"description": "Ubuntu 22.04 LTS",
"product": {
"name": "Ubuntu",
"vendor": {
"name": "Ubuntu",
"scada": false
}
}
}
],
"affected_systems_content": null,
"content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
"cves": [
{
"name": "CVE-2022-3707",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-3707"
},
{
"name": "CVE-2023-3269",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3269"
},
{
"name": "CVE-2023-1076",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1076"
},
{
"name": "CVE-2023-2640",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2640"
},
{
"name": "CVE-2022-48502",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-48502"
},
{
"name": "CVE-2023-3439",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3439"
},
{
"name": "CVE-2023-1281",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1281"
},
{
"name": "CVE-2023-3390",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3390"
},
{
"name": "CVE-2022-47929",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-47929"
},
{
"name": "CVE-2023-3159",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3159"
},
{
"name": "CVE-2023-2985",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2985"
},
{
"name": "CVE-2023-35788",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-35788"
},
{
"name": "CVE-2023-2860",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2860"
},
{
"name": "CVE-2023-31248",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-31248"
},
{
"name": "CVE-2023-2513",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2513"
},
{
"name": "CVE-2023-3090",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3090"
},
{
"name": "CVE-2023-21106",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-21106"
},
{
"name": "CVE-2023-31436",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-31436"
},
{
"name": "CVE-2022-3903",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-3903"
},
{
"name": "CVE-2023-1074",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1074"
},
{
"name": "CVE-2022-4129",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-4129"
},
{
"name": "CVE-2023-32269",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-32269"
},
{
"name": "CVE-2023-1859",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1859"
},
{
"name": "CVE-2023-3111",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3111"
},
{
"name": "CVE-2023-1670",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1670"
},
{
"name": "CVE-2023-32629",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-32629"
},
{
"name": "CVE-2022-1184",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-1184"
},
{
"name": "CVE-2022-2663",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-2663"
},
{
"name": "CVE-2023-1078",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1078"
},
{
"name": "CVE-2023-2162",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2162"
},
{
"name": "CVE-2023-1079",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1079"
},
{
"name": "CVE-2023-1990",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1990"
},
{
"name": "CVE-2023-3161",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3161"
},
{
"name": "CVE-2023-1998",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1998"
},
{
"name": "CVE-2023-1075",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1075"
},
{
"name": "CVE-2023-26545",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-26545"
},
{
"name": "CVE-2023-1380",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1380"
},
{
"name": "CVE-2023-25012",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-25012"
},
{
"name": "CVE-2023-1118",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1118"
},
{
"name": "CVE-2022-3303",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-3303"
},
{
"name": "CVE-2022-3108",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-3108"
},
{
"name": "CVE-2023-1829",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1829"
},
{
"name": "CVE-2023-3141",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3141"
},
{
"name": "CVE-2023-30456",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-30456"
},
{
"name": "CVE-2023-0458",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-0458"
},
{
"name": "CVE-2023-2612",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2612"
},
{
"name": "CVE-2023-1077",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1077"
},
{
"name": "CVE-2023-1073",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1073"
},
{
"name": "CVE-2023-35001",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-35001"
},
{
"name": "CVE-2023-1513",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1513"
},
{
"name": "CVE-2023-32233",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-32233"
},
{
"name": "CVE-2023-0459",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-0459"
},
{
"name": "CVE-2023-1611",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-1611"
},
{
"name": "CVE-2023-3268",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3268"
},
{
"name": "CVE-2022-3635",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-3635"
},
{
"name": "CVE-2023-2124",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-2124"
},
{
"name": "CVE-2023-3389",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-3389"
}
],
"initial_release_date": "2023-07-28T00:00:00",
"last_revision_date": "2023-07-28T00:00:00",
"links": [],
"reference": "CERTFR-2023-AVI-0599",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2023-07-28T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"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 \u003cspan\nclass=\"textit\"\u003ele noyau Linux d\u0027Ubuntu\u003c/span\u003e. Certaines d\u0027entre elles\npermettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, une\nex\u00e9cution de code arbitraire et une atteinte \u00e0 la confidentialit\u00e9 des\ndonn\u00e9es.\n",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans le noyau Linux d\u0027Ubuntu",
"vendor_advisories": [
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6246-1 du 25 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6246-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6252-1 du 26 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6252-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6249-1 du 25 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6249-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6250-1 du 25 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6250-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6256-1 du 27 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6256-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6248-1 du 25 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6248-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6254-1 du 26 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6254-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6247-1 du 25 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6247-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6251-1 du 26 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6251-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6255-1 du 26 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6255-1"
},
{
"published_at": null,
"title": "Bulletin de s\u00e9curit\u00e9 Ubuntu USN-6260-1 du 27 juillet 2023",
"url": "https://ubuntu.com/security/notices/USN-6260-1"
}
]
}
CVE-2023-3090 (GCVE-0-2023-3090)
Vulnerability from cvelistv5 – Published: 2023-06-28 19:06 – Updated: 2025-03-05 18:55
VLAI
EPSS
VEX
Title
Out-of-bounds write in Linux kernel's ipvlan network driver
Summary
A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to achieve local privilege escalation.
The out-of-bounds write is caused by missing skb->cb initialization in the ipvlan network driver. The vulnerability is reachable if CONFIG_IPVLAN is enabled.
We recommend upgrading past commit 90cbed5247439a966b645b34eb0a2e037836ea8e.
Severity
7.8 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-05 18:42 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
9 references
Date Public
2023-05-10 09:33
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CVE-2023-3111 (GCVE-0-2023-3111)
Vulnerability from cvelistv5 – Published: 2023-06-05 00:00 – Updated: 2025-04-23 16:21
VLAI
EPSS
VEX
Summary
A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling btrfs_ioctl_defrag().
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:27 UTC
CWE
Assigner
References
5 references
Impacted products
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CVE-2023-31248 (GCVE-0-2023-31248)
Vulnerability from cvelistv5 – Published: 2023-07-05 18:33 – Updated: 2025-03-05 18:54
VLAI
EPSS
VEX
Title
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability
Summary
Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-05 18:36 UTC
CWE
Assigner
References
10 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux Kernel |
Affected:
v5.9-rc1
|
Date Public
2023-07-05 12:12
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CVE-2023-3141 (GCVE-0-2023-3141)
Vulnerability from cvelistv5 – Published: 2023-06-09 00:00 – Updated: 2026-10-14 20:42
VLAI
EPSS
VEX
Summary
A use-after-free flaw was found in r592_remove in drivers/memstick/host/r592.c in media access in the Linux Kernel. This flaw allows a local attacker to crash the system at device disconnect, possibly leading to a kernel information leak.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-06 15:55 UTC
CWE
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Kernel |
Affected:
Kenrel version prior to Kernel 6.4-rc1
|
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < V1.1
(custom)
|
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CVE-2023-31436 (GCVE-0-2023-31436)
Vulnerability from cvelistv5 – Published: 2023-04-28 00:00 – Updated: 2026-10-14 23:12
VLAI
EPSS
VEX
Summary
qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQ_MIN_LMAX.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-15 17:15 UTC
CWE
- n/a
- CWE-787 - Out-of-bounds Write
Assigner
References
11 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < V1.1
(custom)
|
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CVE-2023-3159 (GCVE-0-2023-3159)
Vulnerability from cvelistv5 – Published: 2023-06-12 00:00 – Updated: 2025-04-23 16:21
VLAI
EPSS
VEX
Summary
A use after free issue was discovered in driver/firewire in outbound_phy_packet_callback in the Linux Kernel. In this flaw a local attacker with special privilege may cause a use after free problem when queue_event() fails.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:27 UTC
CWE
Assigner
References
1 reference
Impacted products
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CVE-2023-3161 (GCVE-0-2023-3161)
Vulnerability from cvelistv5 – Published: 2023-06-12 00:00 – Updated: 2025-03-11 14:54
VLAI
EPSS
VEX
Summary
A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-06 15:55 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | Linux Kernel (fbcon) |
Affected:
Fixed in kernel 6.2-rc7
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CVE-2023-32233 (GCVE-0-2023-32233)
Vulnerability from cvelistv5 – Published: 2023-05-08 00:00 – Updated: 2026-10-14 23:17
VLAI
EPSS
VEX
Summary
In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:28 UTC
CWE
- n/a
- CWE-416 - Use After Free
Assigner
References
13 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < V1.1
(custom)
|
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CVE-2023-32269 (GCVE-0-2023-32269)
Vulnerability from cvelistv5 – Published: 2023-05-05 00:00 – Updated: 2025-05-05 15:57
VLAI
EPSS
VEX
Summary
An issue was discovered in the Linux kernel before 6.1.11. In net/netrom/af_netrom.c, there is a use-after-free because accept is also allowed for a successfully connected AF_NETROM socket. However, in order for an attacker to exploit this, the system must have netrom routing configured or the attacker must have the CAP_NET_ADMIN capability.
Severity
6.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 13:28 UTC
CWE
- n/a
- CWE-416 - Use After Free
Assigner
References
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CVE-2023-32629 (GCVE-0-2023-32629)
Vulnerability from cvelistv5 – Published: 2023-07-26 01:59 – Updated: 2025-02-13 16:54
VLAI
EPSS
VEX
Summary
Local privilege escalation vulnerability in Ubuntu Kernels overlayfs ovl_copy_up_meta_inode_data skip permission checks when calling ovl_do_setxattr on Ubuntu kernels
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-23 14:52 UTC
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://ubuntu.com/security/notices/USN-6250-1 | vendor-advisory |
| https://lists.ubuntu.com/archives/kernel-team/202… | mailing-list |
| https://wiz.io/blog/ubuntu-overlayfs-vulnerability | technical-description |
| https://cve.mitre.org/cgi-bin/cvename.cgi?name=CV… | issue-tracking |
| http://packetstormsecurity.com/files/174577/Kerne… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Canonical | Ubuntu Kernel |
Unaffected:
0 , < 6.2.0-26.26
(semver)
Unaffected: 0 , < 6.0.0-1020.20 (semver) Unaffected: 0 , < 5.4.0-155.172 (semver) |
|
| canonical | ubantu_kernel |
Affected:
0 , < .2.0-26.26
(semver)
Affected: 0 , < 6.0.0-1020.20 (semver) Affected: 0 , < 5.4.0-155.172 (semver) cpe:2.3:o:canonical:ubantu_kernel:*:*:*:*:*:*:*:* |
Date Public
2023-06-06 00:00
Credits
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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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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