CVE-2022-50666
In the Linux kernel, the following vulnerability has been resolved:
RDMA/siw: Fix QP destroy to wait for all references dropped.
Delay QP destroy completion until all siw references to QP are dropped. The calling RDMA core will free QP structure after successful return from siw_qp_destroy() call, so siw must not hold any remaining reference to the QP upon return. A use-after-free was encountered in xfstest generic/460, while testing NFSoRDMA. Here, after a TCP connection drop by peer, the triggered siw_cm_work_handler got delayed until after QP destroy call, referencing a QP which has already freed.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.73%
- Percentil entre todas las CVEs puntuadas: 53
- 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
T1190Exploit Public-Facing Applicationinitial access45 %
Vector N/AC:L/PR:N/UI:N sugiere T1190, pero es una falla de memoria kernel (use-after-free) sin evidencia de explotación remota activa. El impacto principal es DoS (conexión TCP perdida causa crash). T1068 secundario por riesgo potencial de ejecución en contexto kernel.
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 (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2022-50666",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"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": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b",
"lessThan": "5c75d608fad58301b63e7d69200c13c3a1d411da",
"versionType": "git"
},
{
"status": "affected",
"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b",
"lessThan": "74ad141e995a730760b1bcfa14854b7f1057d6bc",
"versionType": "git"
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{
"status": "affected",
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"lessThan": "0ed8bf9d0bb19f3f5eedd73f04aaf5bba9ac0737",
"versionType": "git"
},
{
"status": "affected",
"version": "303ae1cdfdf7280ff4cfbbe65563b5ff15bb025b",
"lessThan": "a3c278807a459e6f50afee6971cabe74cccfb490",
"versionType": "git"
}
],
"programFiles": [
"drivers/infiniband/sw/siw/siw.h",
"drivers/infiniband/sw/siw/siw_qp.c",
"drivers/infiniband/sw/siw/siw_verbs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.75",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "5.19.17",
"versionType": "semver",
"lessThanOrEqual": "5.19.*"
},
{
"status": "unaffected",
"version": "6.0.3",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/infiniband/sw/siw/siw.h",
"drivers/infiniband/sw/siw/siw_qp.c",
"drivers/infiniband/sw/siw/siw_verbs.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-09T16:17:18.600",
"references": [
{
"url": "https://git.kernel.org/stable/c/0ed8bf9d0bb19f3f5eedd73f04aaf5bba9ac0737",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5c75d608fad58301b63e7d69200c13c3a1d411da",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/74ad141e995a730760b1bcfa14854b7f1057d6bc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a3c278807a459e6f50afee6971cabe74cccfb490",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Fix QP destroy to wait for all references dropped.\n\nDelay QP destroy completion until all siw references to QP are\ndropped. The calling RDMA core will free QP structure after\nsuccessful return from siw_qp_destroy() call, so siw must not\nhold any remaining reference to the QP upon return.\nA use-after-free was encountered in xfstest generic/460, while\ntesting NFSoRDMA. Here, after a TCP connection drop by peer,\nthe triggered siw_cm_work_handler got delayed until after\nQP destroy call, referencing a QP which has already freed."
}
],
"lastModified": "2026-08-04T10:18:20.697",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}