{"id":"CVE-2026-46046","title":"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 …","summary":"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 …","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.4.293, < 5.5","linux_kernel >= 5.10.237, < 5.10.258","linux_kernel >= 5.15.181, < 5.15.209","linux_kernel >= 6.1.135, < 6.1.175","linux_kernel >= 6.6.88, < 6.6.140","linux_kernel >= 6.12.24, < 6.12.86","linux_kernel >= 6.13.12, < 6.14","linux_kernel >= 6.14.3, < 6.18.27","linux_kernel >= 6.19, < 7.0.4"],"patched":["linux_kernel 7.0.4"],"published":"2026-05-27","updated":"2026-09-08","sourceUpdated":"2026-09-08T09:18:07.223","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46046","references":[{"url":"https://git.kernel.org/stable/c/097227f1ffe1a85bc3c359f81c71e3d40e06e920","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/153ab2c52355fbebcae622db8e7b506492c73a29","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1bc1107a3a403a6d440673ed6666f7b07ef868a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1e6b0a69bf2c9c819255c7566e4355536d81d9cf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/77d059519382bd66283e6a4e83ee186e87e7708f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b706d00206a9e82362a9633efbd8b5775650169b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dd98a5603a212ea9c96c6982ccdbcc748fdb9a56","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f072906688933bf47fabbaf63560be03357c8298","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00125,"epssPercentile":0.02571,"ingestedAt":"2026-09-08T13:33:24.391Z","slug":"CVE-2026-46046","body":"## Overview\n\nIn 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().\n\n## Affected\n\n- `linux_kernel >= 5.4.293, < 5.5`\n- `linux_kernel >= 5.10.237, < 5.10.258`\n- `linux_kernel >= 5.15.181, < 5.15.209`\n- `linux_kernel >= 6.1.135, < 6.1.175`\n- `linux_kernel >= 6.6.88, < 6.6.140`\n- `linux_kernel >= 6.12.24, < 6.12.86`\n- `linux_kernel >= 6.13.12, < 6.14`\n- `linux_kernel >= 6.14.3, < 6.18.27`\n- `linux_kernel >= 6.19, < 7.0.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.4`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}