CVE-2026-46046

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().

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/097227f1ffe1a85bc3c359f81c71e3d40e06e920	Patch
https://git.kernel.org/stable/c/153ab2c52355fbebcae622db8e7b506492c73a29	Patch
https://git.kernel.org/stable/c/1bc1107a3a403a6d440673ed6666f7b07ef868a8	Patch
https://git.kernel.org/stable/c/1e6b0a69bf2c9c819255c7566e4355536d81d9cf	Patch
https://git.kernel.org/stable/c/77d059519382bd66283e6a4e83ee186e87e7708f	Patch
https://git.kernel.org/stable/c/b706d00206a9e82362a9633efbd8b5775650169b	Patch
https://git.kernel.org/stable/c/dd98a5603a212ea9c96c6982ccdbcc748fdb9a56	Patch
https://git.kernel.org/stable/c/f072906688933bf47fabbaf63560be03357c8298	Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-05-27 14:17

Updated : 2026-09-08 09:18

NVD link : CVE-2026-46046

Mitre link : CVE-2026-46046

CVE.ORG link : CVE-2026-46046

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

{"id": "CVE-2026-46046", "cveTags": [], "metrics": {"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}]}, "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": "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"}], "programFiles": ["fs/ext4/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": "6.15"}, {"status": "unaffected", "version": "0", "lessThan": "6.15", "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": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.86", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.27", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ext4/xattr.c"], "defaultStatus": "affected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-05-27T14:17:24.083", "references": [{"url": "https://git.kernel.org/stable/c/097227f1ffe1a85bc3c359f81c71e3d40e06e920", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/153ab2c52355fbebcae622db8e7b506492c73a29", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1bc1107a3a403a6d440673ed6666f7b07ef868a8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1e6b0a69bf2c9c819255c7566e4355536d81d9cf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/77d059519382bd66283e6a4e83ee186e87e7708f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b706d00206a9e82362a9633efbd8b5775650169b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dd98a5603a212ea9c96c6982ccdbcc748fdb9a56", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f072906688933bf47fabbaf63560be03357c8298", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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()."}], "lastModified": "2026-09-08T09:18:07.223", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D6F83CA-7E5C-4A91-9D8C-71CC85535E7D", "versionEndExcluding": "5.5", "versionStartIncluding": "5.4.293"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8832159-E9F2-4E3A-869E-F397B4D75488", "versionEndExcluding": "5.10.258", "versionStartIncluding": "5.10.237"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "319819D2-533D-4AE6-8CE2-84C6808BA7CB", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.15.181"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB26E4C3-EF6C-4A53-AD49-F12E5001AEFB", "versionEndExcluding": "6.1.175", "versionStartIncluding": "6.1.135"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "78409D7B-A51C-439C-AF2E-F5FAF6F02BDC", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.6.88"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "76B7F60B-B474-4C36-A4E5-AC38213567AA", "versionEndExcluding": "6.12.86", "versionStartIncluding": "6.12.24"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A1F1E5FF-68CB-46CE-BC4F-8E19FA72A921", "versionEndExcluding": "6.14", "versionStartIncluding": "6.13.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "545E0292-CABD-403E-B491-40F7EC9DC8CA", "versionEndExcluding": "6.18.27", "versionStartIncluding": "6.14.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}