CVE-2024-35791
Estado: ModificadaAlta (7.8)—
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: SVM: Vaciar páginas bajo kvm->lock para arreglar UAF en svm_register_enc_region() Realice el vaciado de caché de las páginas convertidas en svm_register_enc_region() antes de eliminar kvm->lock para arreglar el uso -Problemas posteriores a la liberación en los que la región y/o su conjunto de páginas podrían liberarse mediante una tarea diferente, por ejemplo, si el espacio de usuario ya tiene __unregister_enc_region_locked() en cola para la región.
Leer descripción completaMostrar menos
Tenga en cuenta que la alternativa "obvia" de usar variables locales no resuelve completamente el error, ya que región->páginas también se asigna dinámicamente. Es decir, la estructura de la región en sí estaría bien, pero se podrían liberar regiones->páginas. Vaciar varias páginas bajo kvm->lock es desafortunado, pero todo el flujo es un camino lento poco común, y el vaciado manual solo es necesario en CPU que carecen de coherencia para la memoria cifrada.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.24%
- Percentil entre todas las CVEs puntuadas: 14
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-416
Referencias
- https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4
- https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d
- https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865
- https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807
- https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7
- https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a
- https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4
- https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d
- https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865
- https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807
- https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7
- https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-35791",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-35791",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2024-09-10T15:42:51.101780Z"
}
}
],
"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": 7.8,
"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
}
]
},
"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": "4f627ecde7329e476a077bb0590db8f27bb8f912",
"lessThan": "2d13b79640b147bd77c34a5998533b2021a4122d",
"versionType": "git"
},
{
"status": "affected",
"version": "19a23da53932bc8011220bd8c410cb76012de004",
"lessThan": "e126b508ed2e616d679d85fca2fbe77bb48bbdd7",
"versionType": "git"
},
{
"status": "affected",
"version": "19a23da53932bc8011220bd8c410cb76012de004",
"lessThan": "4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865",
"versionType": "git"
},
{
"status": "affected",
"version": "19a23da53932bc8011220bd8c410cb76012de004",
"lessThan": "12f8e32a5a389a5d58afc67728c76e61beee1ad4",
"versionType": "git"
},
{
"status": "affected",
"version": "19a23da53932bc8011220bd8c410cb76012de004",
"lessThan": "f6d53d8a2617dd58c89171a6b9610c470ebda38a",
"versionType": "git"
},
{
"status": "affected",
"version": "19a23da53932bc8011220bd8c410cb76012de004",
"lessThan": "5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807",
"versionType": "git"
},
{
"status": "affected",
"version": "f1ecde00ce1694597f923f0d25f7a797c5243d99",
"versionType": "git"
},
{
"status": "affected",
"version": "848bcb0a1d96f67d075465667d3a1ad4af56311e",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.15",
"lessThan": "5.10.215",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.176",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.98",
"lessThan": "5.5",
"versionType": "semver"
}
],
"programFiles": [
"arch/x86/kvm/svm/sev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.215",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.154",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.84",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.24",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.12",
"versionType": "semver",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/svm/sev.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2024-05-17T13:15:58.873",
"references": [
{
"url": "https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/12f8e32a5a389a5d58afc67728c76e61beee1ad4",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/stable/c/2d13b79640b147bd77c34a5998533b2021a4122d",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/stable/c/4868c0ecdb6cfde7c70cf478c46e06bb9c7e5865",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/stable/c/5ef1d8c1ddbf696e47b226e11888eaf8d9e8e807",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/stable/c/e126b508ed2e616d679d85fca2fbe77bb48bbdd7",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://git.kernel.org/stable/c/f6d53d8a2617dd58c89171a6b9610c470ebda38a",
"tags": [
"Patch"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
"tags": [
"Third Party Advisory"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-416"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Flush pages under kvm->lock to fix UAF in svm_register_enc_region()\n\nDo the cache flush of converted pages in svm_register_enc_region() before\ndropping kvm->lock to fix use-after-free issues where region and/or its\narray of pages could be freed by a different task, e.g. if userspace has\n__unregister_enc_region_locked() already queued up for the region.\n\nNote, the \"obvious\" alternative of using local variables doesn't fully\nresolve the bug, as region->pages is also dynamically allocated. I.e. the\nregion structure itself would be fine, but region->pages could be freed.\n\nFlushing multiple pages under kvm->lock is unfortunate, but the entire\nflow is a rare slow path, and the manual flush is only needed on CPUs that\nlack coherency for encrypted memory."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: KVM: SVM: Vaciar páginas bajo kvm->lock para arreglar UAF en svm_register_enc_region() Realice el vaciado de caché de las páginas convertidas en svm_register_enc_region() antes de eliminar kvm->lock para arreglar el uso -Problemas posteriores a la liberación en los que la región y/o su conjunto de páginas podrían liberarse mediante una tarea diferente, por ejemplo, si el espacio de usuario ya tiene __unregister_enc_region_locked() en cola para la región. Tenga en cuenta que la alternativa \"obvia\" de usar variables locales no resuelve completamente el error, ya que región->páginas también se asigna dinámicamente. Es decir, la estructura de la región en sí estaría bien, pero se podrían liberar regiones->páginas. Vaciar varias páginas bajo kvm->lock es desafortunado, pero todo el flujo es un camino lento poco común, y el vaciado manual solo es necesario en CPU que carecen de coherencia para la memoria cifrada."
}
],
"lastModified": "2026-08-04T11:17:52.860",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "431F7799-C3BC-460E-9A3F-7C2DA6D37216",
"versionEndExcluding": "4.20",
"versionStartIncluding": "4.19.176"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "61592AB5-E211-43FF-8AC4-BF2F575C8CC5",
"versionEndExcluding": "5.5",
"versionStartIncluding": "5.4.98"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D51DB3B8-8791-493A-AD50-68977535E7D3",
"versionEndExcluding": "5.10.215",
"versionStartIncluding": "5.10.15"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0CBA0E6F-C94F-4969-AE1F-62236EBE4246",
"versionEndExcluding": "5.15.154",
"versionStartIncluding": "5.11.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "834D9BD5-42A6-4D74-979E-4D6D93F630FD",
"versionEndExcluding": "6.1.84",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8018C1D0-0A5F-48D0-BC72-A2B33FDDA693",
"versionEndExcluding": "6.6.24",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "6BE9771A-BAFD-4624-95F9-58D536540C53",
"versionEndExcluding": "6.7.12",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.11:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7AD3510E-E8FA-47F3-9AD5-D8EA4A2719D1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.11:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E9FA9D80-C790-41EA-8A21-DF7B170465E0"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "F02056A5-B362-4370-9FF8-6F0BD384D520"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "62075ACE-B2A0-4B16-829D-B3DA5AE5CC41"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A780F817-2A77-4130-A9B7-5C25606314E3"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "AEB9199B-AB8F-4877-8964-E2BA95B5F15C"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C9B8A5CE-6D20-4C36-AC01-ACA4B70003A8"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}