CVE-2026-90107
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
net/smc: free pending qentry in smc_llc_flow_stop() before memset
smc_llc_flow_stop() resets a flow struct with a blind memset:
If flow->qentry is non-NULL at this point the pointer is overwritten without the allocation being freed, leaking one kmalloc object.
A late-arriving duplicate CONFIRM_LINK or ADD_LINK_CONT message can set flow->qentry after the legitimate message has been consumed by the waiter via smc_llc_flow_qentry_clr() (which NULLs the pointer but leaves flow->type non-zero) but before the flow completes and smc_llc_flow_stop() runs. In that window the duplicate is stashed into flow->qentry, and then lost when smc_llc_flow_stop() zeros the struct.
Leer descripción completaMostrar menos
Call smc_llc_flow_qentry_del() inside the lock before the memset. smc_llc_flow_qentry_del() already checks flow->qentry before freeing, so the normal case where no entry is pending is a no-op.
Detalles técnicos trazas, registros y código del informe original
spin_lock_bh(&lgr->llc_flow_lock); memset(flow, 0, sizeof(*flow)); flow->type = SMC_LLC_FLOW_NONE; spin_unlock_bh(&lgr->llc_flow_lock);
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 4/10/2026
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).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/032aec7d03c9102616b98fea74f8f7145e7f867c
- https://git.kernel.org/stable/c/0879ea157acc1ac6752f6fcb755d1f91a2359238
- https://git.kernel.org/stable/c/11bc373ee6630709f0c2da2e7860c23d503c9e9d
- https://git.kernel.org/stable/c/5ee0ceddc7785c6dcf4a8107fef01f0414a354f4
- https://git.kernel.org/stable/c/5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b
- https://git.kernel.org/stable/c/8e3deb150a5237b672c4579e69a6deb02027dbed
- https://git.kernel.org/stable/c/957dba2b8b5aebfe09caa6a6b22b958079082eab
- https://git.kernel.org/stable/c/f03aa5d36ae3c4068a1c3885146be99aa7fd9307
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-90107",
"cveTags": [],
"metrics": {},
"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": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "8e3deb150a5237b672c4579e69a6deb02027dbed",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "11bc373ee6630709f0c2da2e7860c23d503c9e9d",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "032aec7d03c9102616b98fea74f8f7145e7f867c",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "957dba2b8b5aebfe09caa6a6b22b958079082eab",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "f03aa5d36ae3c4068a1c3885146be99aa7fd9307",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "0879ea157acc1ac6752f6fcb755d1f91a2359238",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b",
"versionType": "git"
},
{
"status": "affected",
"version": "555da9af827d95134656fa459c8f3ece04dd867a",
"lessThan": "5ee0ceddc7785c6dcf4a8107fef01f0414a354f4",
"versionType": "git"
}
],
"programFiles": [
"net/smc/smc_llc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/smc_llc.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-17T17:17:02.570",
"references": [
{
"url": "https://git.kernel.org/stable/c/032aec7d03c9102616b98fea74f8f7145e7f867c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/0879ea157acc1ac6752f6fcb755d1f91a2359238",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/11bc373ee6630709f0c2da2e7860c23d503c9e9d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5ee0ceddc7785c6dcf4a8107fef01f0414a354f4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8e3deb150a5237b672c4579e69a6deb02027dbed",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/957dba2b8b5aebfe09caa6a6b22b958079082eab",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f03aa5d36ae3c4068a1c3885146be99aa7fd9307",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: free pending qentry in smc_llc_flow_stop() before memset\n\nsmc_llc_flow_stop() resets a flow struct with a blind memset:\n\n\tspin_lock_bh(&lgr->llc_flow_lock);\n\tmemset(flow, 0, sizeof(*flow));\n\tflow->type = SMC_LLC_FLOW_NONE;\n\tspin_unlock_bh(&lgr->llc_flow_lock);\n\nIf flow->qentry is non-NULL at this point the pointer is overwritten without the\nallocation being freed, leaking one kmalloc object.\n\nA late-arriving duplicate CONFIRM_LINK or ADD_LINK_CONT message can set\nflow->qentry after the legitimate message has been consumed by the waiter via\nsmc_llc_flow_qentry_clr() (which NULLs the pointer but leaves flow->type\nnon-zero) but before the flow completes and smc_llc_flow_stop() runs. In that\nwindow the duplicate is stashed into flow->qentry, and then lost when\nsmc_llc_flow_stop() zeros the struct.\n\nCall smc_llc_flow_qentry_del() inside the lock before the memset.\nsmc_llc_flow_qentry_del() already checks flow->qentry before freeing, so the\nnormal case where no entry is pending is a no-op."
}
],
"lastModified": "2026-09-17T17:17:02.570",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}