CVE-2024-50038 (GCVE-0-2024-50038)
Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2026-05-11 20:44
VLAI
EPSS
VEX
Title
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xtables: avoid NFPROTO_UNSPEC where needed
syzbot managed to call xt_cluster match via ebtables:
WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780
[..]
ebt_do_table+0x174b/0x2a40
Module registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet
processing. As this is only useful to restrict locally terminating
TCP/UDP traffic, register this for ipv4 and ipv6 family only.
Pablo points out that this is a general issue, direct users of the
set/getsockopt interface can call into targets/matches that were only
intended for use with ip(6)tables.
Check all UNSPEC matches and targets for similar issues:
- matches and targets are fine except if they assume skb_network_header()
is valid -- this is only true when called from inet layer: ip(6) stack
pulls the ip/ipv6 header into linear data area.
- targets that return XT_CONTINUE or other xtables verdicts must be
restricted too, they are incompatbile with the ebtables traverser, e.g.
EBT_CONTINUE is a completely different value than XT_CONTINUE.
Most matches/targets are changed to register for NFPROTO_IPV4/IPV6, as
they are provided for use by ip(6)tables.
The MARK target is also used by arptables, so register for NFPROTO_ARP too.
While at it, bail out if connbytes fails to enable the corresponding
conntrack family.
This change passes the selftests in iptables.git.
Severity
No CVSS data available.
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:25 UTC
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0269ea4937343536ec7e85649932bc8c9686ea78 , < 85ff9a0f793ca52c527e75cd40a69c948627ebde
(git)
Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 8f482bb7e27b37f1f734bb9a8eeb28b23d59d189 (git) Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 997f67d813ce0cf5eb3cdb8f124da68141e91b6c (git) Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 4cdc55ec6222bb195995cc58f7cb46e4d8907056 (git) Affected: 0269ea4937343536ec7e85649932bc8c9686ea78 , < 0bfcb7b71e735560077a42847f69597ec7dcc326 (git) |
guessed | |
| Linux | Linux |
Affected:
2.6.30
Unaffected: 0 , < 2.6.30 (semver) Unaffected: 5.15.168 , ≤ 5.15.* (semver) Unaffected: 6.1.113 , ≤ 6.1.* (semver) Unaffected: 6.6.57 , ≤ 6.6.* (semver) Unaffected: 6.11.4 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: xtables: evita NFPROTO_UNSPEC donde sea necesario syzbot logr\u00f3 llamar a xt_cluster match a trav\u00e9s de ebtables: ADVERTENCIA: CPU: 0 PID: 11 en net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780 [..] ebt_do_table+0x174b/0x2a40 El m\u00f3dulo se registra en NFPROTO_UNSPEC, pero asume el procesamiento de paquetes ipv4/ipv6. Como esto solo es \u00fatil para restringir el tr\u00e1fico TCP/UDP que termina localmente, reg\u00edstrelo solo para la familia ipv4 e ipv6. Pablo se\u00f1ala que este es un problema general, los usuarios directos de la interfaz set/getsockopt pueden llamar a destinos/coincidencias que solo estaban destinados a usarse con tablas ip(6). Compruebe todas las coincidencias y objetivos UNSPEC para ver si hay problemas similares: - las coincidencias y los objetivos est\u00e1n bien excepto si asumen que skb_network_header() es v\u00e1lido - esto solo es cierto cuando se llama desde la capa inet: la pila ip(6) extrae el encabezado ip/ipv6 en el \u00e1rea de datos lineales. - los objetivos que devuelven XT_CONTINUE u otros veredictos de xtables tambi\u00e9n deben restringirse, son incompatibles con el traverser de ebtables, por ejemplo, EBT_CONTINUE es un valor completamente diferente de XT_CONTINUE. La mayor\u00eda de las coincidencias/objetivos se cambian para registrarse para NFPROTO_IPV4/IPV6, ya que se proporcionan para su uso por ip(6)tables. El objetivo MARK tambi\u00e9n lo usan arptables, as\u00ed que reg\u00edstrese tambi\u00e9n para NFPROTO_ARP. Mientras tanto, abandone si connbytes no puede habilitar la familia conntrack correspondiente. Este cambio pasa las autopruebas en iptables.git."
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"lastModified": "2026-06-17T08:03:26.037",
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"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-50038",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T13:25:10.359959Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-10-21T20:15:16.877",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
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],
"url": "https://git.kernel.org/stable/c/4cdc55ec6222bb195995cc58f7cb46e4d8907056"
},
{
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"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/85ff9a0f793ca52c527e75cd40a69c948627ebde"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6c"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-28T08:08:09+00:00",
"cve": "CVE-2024-50038",
"id": "CVE-2024-50038",
"initial_release_date": "2024-10-21T00:00:00+00:00",
"product_status:fixed": "305",
"product_status:known_affected": "112",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: netfilter: xtables: avoid NFPROTO_UNSPEC where needed",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-50038.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2025-11-03T22:24:43.902Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-50038",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-10-22T13:25:10.359959Z",
"version": "2.0.3"
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"type": "ssvc"
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}
],
"providerMetadata": {
"dateUpdated": "2024-10-22T13:25:13.522Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/netfilter/xt_CHECKSUM.c",
"net/netfilter/xt_CLASSIFY.c",
"net/netfilter/xt_CONNSECMARK.c",
"net/netfilter/xt_CT.c",
"net/netfilter/xt_IDLETIMER.c",
"net/netfilter/xt_LED.c",
"net/netfilter/xt_NFLOG.c",
"net/netfilter/xt_RATEEST.c",
"net/netfilter/xt_SECMARK.c",
"net/netfilter/xt_TRACE.c",
"net/netfilter/xt_addrtype.c",
"net/netfilter/xt_cluster.c",
"net/netfilter/xt_connbytes.c",
"net/netfilter/xt_connlimit.c",
"net/netfilter/xt_connmark.c",
"net/netfilter/xt_mark.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "85ff9a0f793ca52c527e75cd40a69c948627ebde",
"status": "affected",
"version": "0269ea4937343536ec7e85649932bc8c9686ea78",
"versionType": "git"
},
{
"lessThan": "8f482bb7e27b37f1f734bb9a8eeb28b23d59d189",
"status": "affected",
"version": "0269ea4937343536ec7e85649932bc8c9686ea78",
"versionType": "git"
},
{
"lessThan": "997f67d813ce0cf5eb3cdb8f124da68141e91b6c",
"status": "affected",
"version": "0269ea4937343536ec7e85649932bc8c9686ea78",
"versionType": "git"
},
{
"lessThan": "4cdc55ec6222bb195995cc58f7cb46e4d8907056",
"status": "affected",
"version": "0269ea4937343536ec7e85649932bc8c9686ea78",
"versionType": "git"
},
{
"lessThan": "0bfcb7b71e735560077a42847f69597ec7dcc326",
"status": "affected",
"version": "0269ea4937343536ec7e85649932bc8c9686ea78",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/netfilter/xt_CHECKSUM.c",
"net/netfilter/xt_CLASSIFY.c",
"net/netfilter/xt_CONNSECMARK.c",
"net/netfilter/xt_CT.c",
"net/netfilter/xt_IDLETIMER.c",
"net/netfilter/xt_LED.c",
"net/netfilter/xt_NFLOG.c",
"net/netfilter/xt_RATEEST.c",
"net/netfilter/xt_SECMARK.c",
"net/netfilter/xt_TRACE.c",
"net/netfilter/xt_addrtype.c",
"net/netfilter/xt_cluster.c",
"net/netfilter/xt_connbytes.c",
"net/netfilter/xt_connlimit.c",
"net/netfilter/xt_connmark.c",
"net/netfilter/xt_mark.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.30"
},
{
"lessThan": "2.6.30",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.168",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.113",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.57",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.11.*",
"status": "unaffected",
"version": "6.11.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.12",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.168",
"versionStartIncluding": "2.6.30",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.113",
"versionStartIncluding": "2.6.30",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.57",
"versionStartIncluding": "2.6.30",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.11.4",
"versionStartIncluding": "2.6.30",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12",
"versionStartIncluding": "2.6.30",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xtables: avoid NFPROTO_UNSPEC where needed\n\nsyzbot managed to call xt_cluster match via ebtables:\n\n WARNING: CPU: 0 PID: 11 at net/netfilter/xt_cluster.c:72 xt_cluster_mt+0x196/0x780\n [..]\n ebt_do_table+0x174b/0x2a40\n\nModule registers to NFPROTO_UNSPEC, but it assumes ipv4/ipv6 packet\nprocessing. As this is only useful to restrict locally terminating\nTCP/UDP traffic, register this for ipv4 and ipv6 family only.\n\nPablo points out that this is a general issue, direct users of the\nset/getsockopt interface can call into targets/matches that were only\nintended for use with ip(6)tables.\n\nCheck all UNSPEC matches and targets for similar issues:\n\n- matches and targets are fine except if they assume skb_network_header()\n is valid -- this is only true when called from inet layer: ip(6) stack\n pulls the ip/ipv6 header into linear data area.\n- targets that return XT_CONTINUE or other xtables verdicts must be\n restricted too, they are incompatbile with the ebtables traverser, e.g.\n EBT_CONTINUE is a completely different value than XT_CONTINUE.\n\nMost matches/targets are changed to register for NFPROTO_IPV4/IPV6, as\nthey are provided for use by ip(6)tables.\n\nThe MARK target is also used by arptables, so register for NFPROTO_ARP too.\n\nWhile at it, bail out if connbytes fails to enable the corresponding\nconntrack family.\n\nThis change passes the selftests in iptables.git."
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T09:44:25.094Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
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},
{
"url": "https://git.kernel.org/stable/c/8f482bb7e27b37f1f734bb9a8eeb28b23d59d189"
},
{
"url": "https://git.kernel.org/stable/c/997f67d813ce0cf5eb3cdb8f124da68141e91b6c"
},
{
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},
{
"url": "https://git.kernel.org/stable/c/0bfcb7b71e735560077a42847f69597ec7dcc326"
}
],
"title": "netfilter: xtables: avoid NFPROTO_UNSPEC where needed",
"x_generator": {
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},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-50038",
"datePublished": "2024-10-21T19:39:38.451Z",
"dateReserved": "2024-10-21T12:17:06.070Z",
"dateUpdated": "2025-11-03T22:24:43.902Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
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}
}
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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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