CVE-2022-49418
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
NFSv4: Fix free of uninitialized nfs4_label on referral lookup.
Send along the already-allocated fattr along with nfs4_fs_locations, and drop the memcpy of fattr. We end up growing two more allocations, but this fixes up a crash as:
Detalles técnicos trazas, registros y código del informe original
PID: 790 TASK: ffff88811b43c000 CPU: 0 COMMAND: "ls" #0 [ffffc90000857920] panic at ffffffff81b9bfde #1 [ffffc900008579c0] do_trap at ffffffff81023a9b #2 [ffffc90000857a10] do_error_trap at ffffffff81023b78 #3 [ffffc90000857a58] exc_stack_segment at ffffffff81be1f45 #4 [ffffc90000857a80] asm_exc_stack_segment at ffffffff81c009de #5 [ffffc90000857b08] nfs_lookup at ffffffffa0302322 [nfs] #6 [ffffc90000857b70] __lookup_slow at ffffffff813a4a5f #7 [ffffc90000857c60] walk_component at ffffffff813a86c4 #8 [ffffc90000857cb8] path_lookupat at ffffffff813a9553 #9 [ffffc90000857cf0] filename_lookup at ffffffff813ab86b
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.53%
- Percentil entre todas las CVEs puntuadas: 43
- 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).
Tecnologías afectadas (1)
CWE
- CWE-908
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-49418",
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{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"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",
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"affected": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
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"status": "affected",
"version": "9558a007dbc383d48e7f5a123d0b5ff656c71068",
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"versionType": "git"
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],
"programFiles": [
"fs/nfs/nfs4namespace.c",
"fs/nfs/nfs4proc.c",
"fs/nfs/nfs4state.c",
"fs/nfs/nfs4xdr.c",
"include/linux/nfs_xdr.h"
],
"defaultStatus": "unaffected"
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{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"version": "0",
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"status": "unaffected",
"version": "5.18.3",
"versionType": "semver",
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},
{
"status": "unaffected",
"version": "5.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/nfs/nfs4namespace.c",
"fs/nfs/nfs4proc.c",
"fs/nfs/nfs4state.c",
"fs/nfs/nfs4xdr.c",
"include/linux/nfs_xdr.h"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-02-26T07:01:18.260",
"references": [
{
"url": "https://git.kernel.org/stable/c/6015292653d95ba9f72906e2b65e536aa5807d64",
"tags": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c3ed222745d9ad7b69299b349a64ba533c64a34f",
"tags": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-908"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: Fix free of uninitialized nfs4_label on referral lookup.\n\nSend along the already-allocated fattr along with nfs4_fs_locations, and\ndrop the memcpy of fattr. We end up growing two more allocations, but this\nfixes up a crash as:\n\nPID: 790 TASK: ffff88811b43c000 CPU: 0 COMMAND: \"ls\"\n #0 [ffffc90000857920] panic at ffffffff81b9bfde\n #1 [ffffc900008579c0] do_trap at ffffffff81023a9b\n #2 [ffffc90000857a10] do_error_trap at ffffffff81023b78\n #3 [ffffc90000857a58] exc_stack_segment at ffffffff81be1f45\n #4 [ffffc90000857a80] asm_exc_stack_segment at ffffffff81c009de\n #5 [ffffc90000857b08] nfs_lookup at ffffffffa0302322 [nfs]\n #6 [ffffc90000857b70] __lookup_slow at ffffffff813a4a5f\n #7 [ffffc90000857c60] walk_component at ffffffff813a86c4\n #8 [ffffc90000857cb8] path_lookupat at ffffffff813a9553\n #9 [ffffc90000857cf0] filename_lookup at ffffffff813ab86b"
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4: Se corrige el error nfs4_label no inicializado en la búsqueda de referencias. Se envía el fattr ya asignado junto con nfs4_fs_locations y se elimina el memcpy de fattr. Terminamos aumentando dos asignaciones más, pero esto soluciona un fallo como: PID: 790 TAREA: ffff88811b43c000 CPU: 0 COMANDO: \"ls\" #0 [ffffc90000857920] panic en ffffffff81b9bfde #1 [ffffc900008579c0] do_trap en ffffffff81023a9b #2 [ffffc90000857a10] do_error_trap en ffffffff81023b78 #3 [ffffc90000857a58] exc_stack_segment en ffffffff81be1f45 #4 [ffffc90000857a80] asm_exc_stack_segment en ffffffff81c009de #5 [ffffc90000857b08] nfs_lookup en ffffffffa0302322 [nfs] #6 [ffffc90000857b70] __lookup_slow en ffffffff813a4a5f #7 [ffffc90000857c60] walk_component en ffffffff813a86c4 #8 [ffffc90000857cb8] path_lookupat en ffffffff813a9553 #9 [ffffc90000857cf0] filename_lookup en ffffffff813ab86b"
}
],
"lastModified": "2026-08-04T10:17:47.810",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"matchCriteriaId": "98CD047E-3CA9-4A90-93B0-040784FAD016",
"versionEndExcluding": "5.18.3",
"versionStartIncluding": "5.16"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}