CVE-2026-46046
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all() The commit c8e008b60492 ("ext4: ignore xattrs past end") introduced a refcount leak in when block_csum is false. ext4_xattr_inode_dec_ref_all() calls ext4_get_inode_loc() to get iloc.bh, but never releases it with brelse().
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-05-27 14:17:24.083000
Last modified
2026-11-06 17:17:32.690000
View original CVE JSON
{
"id": "CVE-2026-46046",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-05-27T14:17:24.083",
"lastModified": "2026-11-06T17:17:32.690",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()\n\nThe commit c8e008b60492 (\"ext4: ignore xattrs past end\")\nintroduced a refcount leak in when block_csum is false.\n\next4_xattr_inode_dec_ref_all() calls ext4_get_inode_loc() to\nget iloc.bh, but never releases it with brelse()."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"fs/ext4/xattr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3",
"lessThan": "dd98a5603a212ea9c96c6982ccdbcc748fdb9a56",
"versionType": "git",
"status": "affected"
},
{
"version": "f737418b6de31c962c7192777ee4018906975383",
"lessThan": "153ab2c52355fbebcae622db8e7b506492c73a29",
"versionType": "git",
"status": "affected"
},
{
"version": "cf9291a3449b04688b81e32621e88de8f4314b54",
"lessThan": "b706d00206a9e82362a9633efbd8b5775650169b",
"versionType": "git",
"status": "affected"
},
{
"version": "362a90cecd36e8a5c415966d0b75b04a0270e4dd",
"lessThan": "1bc1107a3a403a6d440673ed6666f7b07ef868a8",
"versionType": "git",
"status": "affected"
},
{
"version": "eb59cc31b6ea076021d14b04e7faab1636b87d0e",
"lessThan": "097227f1ffe1a85bc3c359f81c71e3d40e06e920",
"versionType": "git",
"status": "affected"
},
{
"version": "c8e008b60492cf6fd31ef127aea6d02fd3d314cd",
"lessThan": "1e6b0a69bf2c9c819255c7566e4355536d81d9cf",
"versionType": "git",
"status": "affected"
},
{
"version": "c8e008b60492cf6fd31ef127aea6d02fd3d314cd",
"lessThan": "f072906688933bf47fabbaf63560be03357c8298",
"versionType": "git",
"status": "affected"
},
{
"version": "c8e008b60492cf6fd31ef127aea6d02fd3d314cd",
"lessThan": "77d059519382bd66283e6a4e83ee186e87e7708f",
"versionType": "git",
"status": "affected"
},
{
"version": "6aff941cb0f7d0c897c3698ad2e30672709135e3",
"versionType": "git",
"status": "affected"
},
{
"version": "3bc6317033f365ce578eb6039445fb66162722fd",
"versionType": "git",
"status": "affected"
},
{
"version": "836e625b03a666cf93ff5be328c8cb30336db872",
"versionType": "git",
"status": "affected"
},
{
"version": "5.10.237",
"lessThan": "5.10.258",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.181",
"lessThan": "5.15.209",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.1.135",
"lessThan": "6.1.175",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.6.88",
"lessThan": "6.6.140",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.12.24",
"lessThan": "6.12.86",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.4.293",
"lessThan": "5.5",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.13.12",
"lessThan": "6.14",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.14.3",
"lessThan": "6.15",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"fs/ext4/xattr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.15",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.258",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.209",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.175",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.140",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.86",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.27",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.0.4",
"lessThanOrEqual": "7.0.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.1",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"affectedData": [
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.6",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.7",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.6",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.7",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.6",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.7",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.6",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.7",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
"defaultStatus": "unknown",
"versions": [
{
"version": "0",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.6",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
"version": "V3.1.7",
"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-06T16:06:16.044758Z",
"id": "CVE-2026-46046",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.4.293",
"versionEndExcluding": "5.5",
"matchCriteriaId": "4D6F83CA-7E5C-4A91-9D8C-71CC85535E7D"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10.237",
"versionEndExcluding": "5.10.258",
"matchCriteriaId": "D8832159-E9F2-4E3A-869E-F397B4D75488"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.15.181",
"versionEndExcluding": "5.15.209",
"matchCriteriaId": "319819D2-533D-4AE6-8CE2-84C6808BA7CB"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.1.135",
"versionEndExcluding": "6.1.175",
"matchCriteriaId": "AB26E4C3-EF6C-4A53-AD49-F12E5001AEFB"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6.88",
"versionEndExcluding": "6.6.140",
"matchCriteriaId": "78409D7B-A51C-439C-AF2E-F5FAF6F02BDC"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.12.24",
"versionEndExcluding": "6.12.86",
"matchCriteriaId": "76B7F60B-B474-4C36-A4E5-AC38213567AA"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.13.12",
"versionEndExcluding": "6.14",
"matchCriteriaId": "A1F1E5FF-68CB-46CE-BC4F-8E19FA72A921"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.14.3",
"versionEndExcluding": "6.18.27",
"matchCriteriaId": "545E0292-CABD-403E-B491-40F7EC9DC8CA"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.19",
"versionEndExcluding": "7.0.4",
"matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/097227f1ffe1a85bc3c359f81c71e3d40e06e920",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/153ab2c52355fbebcae622db8e7b506492c73a29",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/1bc1107a3a403a6d440673ed6666f7b07ef868a8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/1e6b0a69bf2c9c819255c7566e4355536d81d9cf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/77d059519382bd66283e6a4e83ee186e87e7708f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/b706d00206a9e82362a9633efbd8b5775650169b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/dd98a5603a212ea9c96c6982ccdbcc748fdb9a56",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://git.kernel.org/stable/c/f072906688933bf47fabbaf63560be03357c8298",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
]
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
}
]
}