{"cvss":5.5,"datePublished":"2026-05-27T14:17:24.083","dateUpdated":"2026-09-08T09:18:07.223","description":"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().","id":"CVE-2026-46046","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/ext4/xattr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"dd98a5603a212ea9c96c6982ccdbcc748fdb9a56","status":"affected","version":"76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3","versionType":"git"},{"lessThan":"153ab2c52355fbebcae622db8e7b506492c73a29","status":"affected","version":"f737418b6de31c962c7192777ee4018906975383","versionType":"git"},{"lessThan":"b706d00206a9e82362a9633efbd8b5775650169b","status":"affected","version":"cf9291a3449b04688b81e32621e88de8f4314b54","versionType":"git"},{"lessThan":"1bc1107a3a403a6d440673ed6666f7b07ef868a8","status":"affected","version":"362a90cecd36e8a5c415966d0b75b04a0270e4dd","versionType":"git"},{"lessThan":"097227f1ffe1a85bc3c359f81c71e3d40e06e920","status":"affected","version":"eb59cc31b6ea076021d14b04e7faab1636b87d0e","versionType":"git"},{"lessThan":"1e6b0a69bf2c9c819255c7566e4355536d81d9cf","status":"affected","version":"c8e008b60492cf6fd31ef127aea6d02fd3d314cd","versionType":"git"},{"lessThan":"f072906688933bf47fabbaf63560be03357c8298","status":"affected","version":"c8e008b60492cf6fd31ef127aea6d02fd3d314cd","versionType":"git"},{"lessThan":"77d059519382bd66283e6a4e83ee186e87e7708f","status":"affected","version":"c8e008b60492cf6fd31ef127aea6d02fd3d314cd","versionType":"git"},{"status":"affected","version":"6aff941cb0f7d0c897c3698ad2e30672709135e3","versionType":"git"},{"status":"affected","version":"3bc6317033f365ce578eb6039445fb66162722fd","versionType":"git"},{"status":"affected","version":"836e625b03a666cf93ff5be328c8cb30336db872","versionType":"git"},{"lessThan":"5.10.258","status":"affected","version":"5.10.237","versionType":"semver"},{"lessThan":"5.15.209","status":"affected","version":"5.15.181","versionType":"semver"},{"lessThan":"6.1.175","status":"affected","version":"6.1.135","versionType":"semver"},{"lessThan":"6.6.140","status":"affected","version":"6.6.88","versionType":"semver"},{"lessThan":"6.12.86","status":"affected","version":"6.12.24","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.293","versionType":"semver"},{"lessThan":"6.14","status":"affected","version":"6.13.12","versionType":"semver"},{"lessThan":"6.15","status":"affected","version":"6.14.3","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/ext4/xattr.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.15"},{"lessThan":"6.15","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.140","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.86","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"affectedData":[{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V3.1.6","versionType":"custom"}]}],"source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"4D6F83CA-7E5C-4A91-9D8C-71CC85535E7D","versionEndExcluding":"5.5","versionStartIncluding":"5.4.293","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"D8832159-E9F2-4E3A-869E-F397B4D75488","versionEndExcluding":"5.10.258","versionStartIncluding":"5.10.237","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"319819D2-533D-4AE6-8CE2-84C6808BA7CB","versionEndExcluding":"5.15.209","versionStartIncluding":"5.15.181","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"AB26E4C3-EF6C-4A53-AD49-F12E5001AEFB","versionEndExcluding":"6.1.175","versionStartIncluding":"6.1.135","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"78409D7B-A51C-439C-AF2E-F5FAF6F02BDC","versionEndExcluding":"6.6.140","versionStartIncluding":"6.6.88","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"76B7F60B-B474-4C36-A4E5-AC38213567AA","versionEndExcluding":"6.12.86","versionStartIncluding":"6.12.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"A1F1E5FF-68CB-46CE-BC4F-8E19FA72A921","versionEndExcluding":"6.14","versionStartIncluding":"6.13.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"545E0292-CABD-403E-B491-40F7EC9DC8CA","versionEndExcluding":"6.18.27","versionStartIncluding":"6.14.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3","versionEndExcluding":"7.0.4","versionStartIncluding":"6.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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()."}],"id":"CVE-2026-46046","lastModified":"2026-09-08T09:18:07.223","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2026-05-27T14:17:24.083","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"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":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"NVD-CWE-noinfo"}],"source":"nvd@nist.gov","type":"Primary"}]},"severity":"MEDIUM","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix missing brelse() in ext4_xattr_inode_d..."}