CVE-2026-52962
Estado: AnalizadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
ceph: fix a buffer leak in __ceph_setxattr()
The old_blob in __ceph_setxattr() can store ci->i_xattrs.prealloc_blob value during the retry. However, it is never called the ceph_buffer_put() for the old_blob object. This patch fixes the issue of the buffer leak.
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: 0.18%
- Percentil entre todas las CVEs puntuadas: 6
- 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
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1059Command and Scripting Interpreterexecution60 %
AV:L PR:L UI:N indica escalada local. Buffer leak en kernel Ceph permite corrupción de memoria (CWE-787), potenciando ejecución de código con privilegios elevados.
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)
CWE
- CWE-787
Referencias
- https://git.kernel.org/stable/c/3fa13ceefbc5f36131110342743994cb3de80637
- https://git.kernel.org/stable/c/4bfdcefdaa6092a06cacd59389c7756b36e6de8c
- https://git.kernel.org/stable/c/521e5aba857fd267624892c8dd6295f22ce0267e
- https://git.kernel.org/stable/c/5d3cc36b4e77a27ce7b686b7c59c7072bcb3fa8e
- https://git.kernel.org/stable/c/7d3e8d2d648d5f0df29b4710246680f47695fe94
- https://git.kernel.org/stable/c/bc7abce4460e490dcb579eec770f175b150b685f
- https://git.kernel.org/stable/c/d0cb994605c84a159c1d00d72cdc8583c321ef95
- https://git.kernel.org/stable/c/ecf94823c5c6a20790bb76ed2816822b0beb0c22
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-52962",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"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": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "521e5aba857fd267624892c8dd6295f22ce0267e",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "d0cb994605c84a159c1d00d72cdc8583c321ef95",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "ecf94823c5c6a20790bb76ed2816822b0beb0c22",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "4bfdcefdaa6092a06cacd59389c7756b36e6de8c",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "7d3e8d2d648d5f0df29b4710246680f47695fe94",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "3fa13ceefbc5f36131110342743994cb3de80637",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "bc7abce4460e490dcb579eec770f175b150b685f",
"versionType": "git"
},
{
"status": "affected",
"version": "86968ef21596515958d5f0a40233d02be78ecec0",
"lessThan": "5d3cc36b4e77a27ce7b686b7c59c7072bcb3fa8e",
"versionType": "git"
},
{
"status": "affected",
"version": "1d86cb8d3204337e1853b84d69ea0f30dc0ba973",
"versionType": "git"
},
{
"status": "affected",
"version": "9cec64d3f6d91da590cc4069172254067b43d0b2",
"versionType": "git"
},
{
"status": "affected",
"version": "de30fc2ca852365ed635f62d7d818bffc15e55c9",
"versionType": "git"
},
{
"status": "affected",
"version": "dfb8712c7acce0689aed6c400a22b35f4d2861fe",
"versionType": "git"
},
{
"status": "affected",
"version": "f41cd559f1f3412db8e0acdede05ecf990ebfd8a",
"versionType": "git"
},
{
"status": "affected",
"version": "4.4.192",
"lessThan": "4.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.9.192",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.14.143",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.19.72",
"lessThan": "4.20",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.2.14",
"lessThan": "5.3",
"versionType": "semver"
}
],
"programFiles": [
"fs/ceph/xattr.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": "5.10.258",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.141",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.91",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ceph/xattr.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-06-24T17:17:06.520",
"references": [
{
"url": "https://git.kernel.org/stable/c/3fa13ceefbc5f36131110342743994cb3de80637",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4bfdcefdaa6092a06cacd59389c7756b36e6de8c",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/521e5aba857fd267624892c8dd6295f22ce0267e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5d3cc36b4e77a27ce7b686b7c59c7072bcb3fa8e",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/7d3e8d2d648d5f0df29b4710246680f47695fe94",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bc7abce4460e490dcb579eec770f175b150b685f",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d0cb994605c84a159c1d00d72cdc8583c321ef95",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ecf94823c5c6a20790bb76ed2816822b0beb0c22",
"tags": [
"Patch"
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-787"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix a buffer leak in __ceph_setxattr()\n\nThe old_blob in __ceph_setxattr() can store\nci->i_xattrs.prealloc_blob value during the retry.\nHowever, it is never called the ceph_buffer_put()\nfor the old_blob object. This patch fixes the issue of\nthe buffer leak."
}
],
"lastModified": "2026-07-14T16:18:32.180",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "24554ACA-F02B-4892-BCE2-5C087126FA26",
"versionEndExcluding": "4.5",
"versionStartIncluding": "4.4.192"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EBD930CC-D56B-421B-9B01-0198B9BE2A93",
"versionEndExcluding": "4.10",
"versionStartIncluding": "4.9.192"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4C5DB147-97D0-43EA-BCB8-40F4F90F2A5E",
"versionEndExcluding": "4.15",
"versionStartIncluding": "4.14.143"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DE4A0944-6034-4B24-840D-2A554A2350DB",
"versionEndExcluding": "4.20",
"versionStartIncluding": "4.19.72"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "3F8F5908-1026-4963-A3FE-E6E60489E47F",
"versionEndExcluding": "5.3",
"versionStartIncluding": "5.2.14"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5AC7888E-E208-4C71-9E56-B79EAEF3E150",
"versionEndExcluding": "5.10.258",
"versionStartIncluding": "5.3.1"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "919C10A9-7951-4A74-BADD-C135A0A8D8B4",
"versionEndExcluding": "5.15.209",
"versionStartIncluding": "5.11"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA",
"versionEndExcluding": "6.1.175",
"versionStartIncluding": "5.16"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "97A9FFFA-22BB-4D5C-9790-5A2286E392F7",
"versionEndExcluding": "6.6.141",
"versionStartIncluding": "6.2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C918746B-DE6F-448F-A93E-A04C5481688D",
"versionEndExcluding": "6.12.91",
"versionStartIncluding": "6.7"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "96D99E49-380D-43AB-BDBA-25C3AD018A9C",
"versionEndExcluding": "6.18.33",
"versionStartIncluding": "6.13"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4",
"versionEndExcluding": "7.0.10",
"versionStartIncluding": "6.19"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D036D76E-AC69-4382-B4C1-8EDA1ABB2941"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:rc6:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "65AF2469-2B9F-4D4D-8886-2B8BA66D5FDC"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:rc7:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "21001886-2C34-45F4-9319-60102B357E64"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.3:rc8:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "999345BA-F820-40B9-A711-32CA9265C289"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}