CVE-2025-38107
Estado: ModificadaAlta (7)—
In the Linux kernel, the following vulnerability has been resolved:
net_sched: ets: fix a race in ets_qdisc_change()
Gerrard Tai reported a race condition in ETS, whenever SFQ perturb timer fires at the wrong time.
The race is as follows:
CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put()
This can be abused to underflow a parent's qlen.
Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releasing the lock.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto secundario
T1499.004Application or System Exploitationimpact60 %
Race condition en ETS scheduler del kernel Linux accesible con privilegios locales (PR:L) permite subdesbordamiento de qlen y corrupción de estado, escalando privilegios o causando DoS.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
CWE
- CWE-362
Referencias
- https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6c
- https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3
- https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4f
- https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918f
- https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddb
- https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894b
- https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-38107",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "HIGH",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1
}
]
},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "699d82e9a6db29d509a71f1f2f4316231e6232e6",
"lessThan": "eb7b74e9754e1ba2088f914ad1f57a778b11894b",
"versionType": "git"
},
{
"status": "affected",
"version": "ce881ddbdc028fb1988b66e40e45ca0529c23b46",
"lessThan": "0b479d0aa488cb478eb2e1d8868be946ac8afb4f",
"versionType": "git"
},
{
"status": "affected",
"version": "b05972f01e7d30419987a1f221b5593668fd6448",
"lessThan": "347867cb424edae5fec1622712c8dd0a2c42918f",
"versionType": "git"
},
{
"status": "affected",
"version": "b05972f01e7d30419987a1f221b5593668fd6448",
"lessThan": "0383b25488a545be168744336847549d4a2d3d6c",
"versionType": "git"
},
{
"status": "affected",
"version": "b05972f01e7d30419987a1f221b5593668fd6448",
"lessThan": "073f64c03516bcfaf790f8edc772e0cfb8a84ec3",
"versionType": "git"
},
{
"status": "affected",
"version": "b05972f01e7d30419987a1f221b5593668fd6448",
"lessThan": "fed94bd51d62d2e0e006aa61480e94e5cd0582b0",
"versionType": "git"
},
{
"status": "affected",
"version": "b05972f01e7d30419987a1f221b5593668fd6448",
"lessThan": "d92adacdd8c2960be856e0b82acc5b7c5395fddb",
"versionType": "git"
},
{
"status": "affected",
"version": "fffa19b5e58c34004a0d6f642d9c24b11d213994",
"versionType": "git"
},
{
"status": "affected",
"version": "fb155f6597cd7bc3aeed668c3bb15fc3b7cb257d",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.142",
"lessThan": "5.10.239",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.66",
"lessThan": "5.15.186",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.213",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.19.8",
"lessThan": "5.20",
"versionType": "semver"
}
],
"programFiles": [
"net/sched/sch_ets.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.239",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.186",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.94",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.34",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.3",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sched/sch_ets.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-07-03T09:15:24.273",
"references": [
{
"url": "https://git.kernel.org/stable/c/0383b25488a545be168744336847549d4a2d3d6c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/073f64c03516bcfaf790f8edc772e0cfb8a84ec3",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/0b479d0aa488cb478eb2e1d8868be946ac8afb4f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/347867cb424edae5fec1622712c8dd0a2c42918f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d92adacdd8c2960be856e0b82acc5b7c5395fddb",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eb7b74e9754e1ba2088f914ad1f57a778b11894b",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fed94bd51d62d2e0e006aa61480e94e5cd0582b0",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
"tags": [
"Mailing List",
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-362"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: ets: fix a race in ets_qdisc_change()\n\nGerrard Tai reported a race condition in ETS, whenever SFQ perturb timer\nfires at the wrong time.\n\nThe race is as follows:\n\nCPU 0 CPU 1\n[1]: lock root\n[2]: qdisc_tree_flush_backlog()\n[3]: unlock root\n |\n | [5]: lock root\n | [6]: rehash\n | [7]: qdisc_tree_reduce_backlog()\n |\n[4]: qdisc_put()\n\nThis can be abused to underflow a parent's qlen.\n\nCalling qdisc_purge_queue() instead of qdisc_tree_flush_backlog()\nshould fix the race, because all packets will be purged from the qdisc\nbefore releasing the lock."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net_sched: ets: corrige una ejecución en ets_qdisc_change() Gerrard Tai informó de una condición de ejecución en ETS, siempre que el temporizador de perturbación SFQ se dispara en el momento equivocado. La ejecución es la siguiente: CPU 0 CPU 1 [1]: raíz de bloqueo [2]: qdisc_tree_flush_backlog() [3]: raíz de desbloqueo | | [5]: raíz de bloqueo | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() Esto se puede abusar para desbordar el qlen de un padre. Llamar a qdisc_purge_queue() en lugar de qdisc_tree_flush_backlog() debería corregir la ejecución, porque todos los paquetes se purgarán del qdisc antes de liberar el bloqueo."
}
],
"lastModified": "2026-07-30T06:22:51.527",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3F878731-43F1-4A9E-A036-18BFE499C6E4",
"versionEndExcluding": "5.5",
"versionStartIncluding": "5.4.213"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4FAD8C22-DA06-4F79-A8D2-AB1B56A900B1",
"versionEndExcluding": "5.10.239",
"versionStartIncluding": "5.10.142"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "BE850A17-AC1C-491E-B3A5-ED09E1EAEE85",
"versionEndExcluding": "5.15.186",
"versionStartIncluding": "5.15.66"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "57133CA5-FEDB-4D53-B672-E46C2DC0AC5F",
"versionEndExcluding": "6.0",
"versionStartIncluding": "5.19.8"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8A78062F-0E12-479D-872D-6FA9134EBCAE",
"versionEndExcluding": "6.1.142",
"versionStartIncluding": "6.0.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "304E3F01-7D7A-4908-994E-7F95C5C00B06",
"versionEndExcluding": "6.6.94",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4FFA54AA-CDFE-4591-BD07-72813D0948F4",
"versionEndExcluding": "6.12.34",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0541C761-BD5E-4C1A-8432-83B375D7EB92",
"versionEndExcluding": "6.15.3",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7BE551E5-89CF-47A8-9B26-03CE727FBA37"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F8446E87-F5F6-41CA-8201-BAE0F0CA6DD9"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8E5FB72F-67CE-43CC-83FE-541604D98182"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3A0A7397-F5F8-4753-82DC-9A11288E696D"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E6DE049A-ABA8-41DD-988C-8C088358EE9B"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6D4894DB-CCFE-4602-B1BF-3960B2E19A01"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}