CVE-2023-53276
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
ubifs: Free memory for tmpfile name
When opening a ubifs tmpfile on an encrypted directory, function fscrypt_setup_filename allocates memory for the name that is to be stored in the directory entry, but after the name has been copied to the directory entry inode, the memory is not freed.
When running kmemleak on it we see that it is registered as a leak. The report below is triggered by a simple program 'tmpfile' just opening a tmpfile:
Free this memory after it has been copied to the inode.
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffff88810178f380 (size 32):
comm "tmpfile", pid 509, jiffies 4294934744 (age 1524.742s)
backtrace:
__kmem_cache_alloc_node
__kmalloc
fscrypt_setup_filename
ubifs_tmpfile
vfs_tmpfile
path_openatCVSS
- 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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- 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-401
- CWE-401
Referencias
- https://git.kernel.org/stable/c/107d481642c356a5668058066360fc473911e628
- https://git.kernel.org/stable/c/1e43d4284bdc3bd34bd770fea13910ac37ab0618
- https://git.kernel.org/stable/c/1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3
- https://git.kernel.org/stable/c/29738e1bcc799dd754711d4e4aab967f0c018175
- https://git.kernel.org/stable/c/823f554747f8aafaa965fb2f3ae794110ed429ef
- https://git.kernel.org/stable/c/8ad8c67a897e68426e85990ebfe0a7d1f71fc79f
- https://git.kernel.org/stable/c/b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3
- https://git.kernel.org/stable/c/ce840284929b75dbbf062e0ce7fcb78a63b08b5e
- https://git.kernel.org/stable/c/fd197308c0e4f738c7ea687d5332035c5753881c
JSON original (NVD)
Mostrar
{
"id": "CVE-2023-53276",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-53276",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-01-14T18:07:02.831700Z"
}
}
],
"cvssMetricV31": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"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": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "8ad8c67a897e68426e85990ebfe0a7d1f71fc79f",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "107d481642c356a5668058066360fc473911e628",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "823f554747f8aafaa965fb2f3ae794110ed429ef",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "ce840284929b75dbbf062e0ce7fcb78a63b08b5e",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "29738e1bcc799dd754711d4e4aab967f0c018175",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "fd197308c0e4f738c7ea687d5332035c5753881c",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "1e43d4284bdc3bd34bd770fea13910ac37ab0618",
"versionType": "git"
},
{
"status": "affected",
"version": "f4f61d2cc6d8789a52245a4733b3e5643be154f3",
"lessThan": "1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3",
"versionType": "git"
}
],
"programFiles": [
"fs/ubifs/dir.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.14.315",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.283",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.243",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.180",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.111",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.28",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2.15",
"versionType": "semver",
"lessThanOrEqual": "6.2.*"
},
{
"status": "unaffected",
"version": "6.3.2",
"versionType": "semver",
"lessThanOrEqual": "6.3.*"
},
{
"status": "unaffected",
"version": "6.4",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ubifs/dir.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-09-16T08:15:36.473",
"references": [
{
"url": "https://git.kernel.org/stable/c/107d481642c356a5668058066360fc473911e628",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1e43d4284bdc3bd34bd770fea13910ac37ab0618",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1fb815b38bb31d6af9bd0540b8652a0d6fe6cfd3",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/29738e1bcc799dd754711d4e4aab967f0c018175",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/823f554747f8aafaa965fb2f3ae794110ed429ef",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8ad8c67a897e68426e85990ebfe0a7d1f71fc79f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b8f444a4fadfb5070ed7e298e0a5ceb4a18014f3",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ce840284929b75dbbf062e0ce7fcb78a63b08b5e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fd197308c0e4f738c7ea687d5332035c5753881c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
},
{
"type": "Secondary",
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Free memory for tmpfile name\n\nWhen opening a ubifs tmpfile on an encrypted directory, function\nfscrypt_setup_filename allocates memory for the name that is to be\nstored in the directory entry, but after the name has been copied to the\ndirectory entry inode, the memory is not freed.\n\nWhen running kmemleak on it we see that it is registered as a leak. The\nreport below is triggered by a simple program 'tmpfile' just opening a\ntmpfile:\n\n unreferenced object 0xffff88810178f380 (size 32):\n comm \"tmpfile\", pid 509, jiffies 4294934744 (age 1524.742s)\n backtrace:\n __kmem_cache_alloc_node\n __kmalloc\n fscrypt_setup_filename\n ubifs_tmpfile\n vfs_tmpfile\n path_openat\n\nFree this memory after it has been copied to the inode."
}
],
"lastModified": "2026-06-17T06:44:42.973",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1A8A9F0F-3562-4C72-A33C-CEFDA424F998",
"versionEndExcluding": "4.14.315"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8AC1BC2D-A61C-4368-A3F6-50DF48E2EFC5",
"versionEndExcluding": "4.19.283",
"versionStartIncluding": "4.15"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "E54ACEF5-C8C1-4266-85FC-7D513FFD1DEC",
"versionEndExcluding": "5.4.243",
"versionStartIncluding": "4.20"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "78422AC3-CC89-479E-B4BC-62381D8F3564",
"versionEndExcluding": "5.10.180",
"versionStartIncluding": "5.5"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2B9DD776-7F17-4F72-B94F-54BFCBC692DD",
"versionEndExcluding": "5.15.111",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "08F855F4-7188-4EE1-BD79-D4B6C7E2EF54",
"versionEndExcluding": "6.1.28",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3844A90B-940D-46C3-8D7B-9FF63F1AFC2F",
"versionEndExcluding": "6.2.15",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "38F6F330-91A0-4675-8B90-6F950471A7CC",
"versionEndExcluding": "6.3.2",
"versionStartIncluding": "6.3"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}