CVE-2026-46046 PUBLISHED

ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()

Assigner: Linux
Reserved: 13.05.2026 Published: 27.05.2026 Updated: 27.05.2026

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().

Vendor	Linux
Product	Linux
Versions	Default: unaffected affected from 362a90cecd36e8a5c415966d0b75b04a0270e4dd to 1bc1107a3a403a6d440673ed6666f7b07ef868a8 (excl.) affected from eb59cc31b6ea076021d14b04e7faab1636b87d0e to 097227f1ffe1a85bc3c359f81c71e3d40e06e920 (excl.) affected from c8e008b60492cf6fd31ef127aea6d02fd3d314cd to 1e6b0a69bf2c9c819255c7566e4355536d81d9cf (excl.) affected from c8e008b60492cf6fd31ef127aea6d02fd3d314cd to f072906688933bf47fabbaf63560be03357c8298 (excl.) affected from c8e008b60492cf6fd31ef127aea6d02fd3d314cd to 77d059519382bd66283e6a4e83ee186e87e7708f (excl.) Version 6aff941cb0f7d0c897c3698ad2e30672709135e3 is affected Version 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 is affected Version f737418b6de31c962c7192777ee4018906975383 is affected Version cf9291a3449b04688b81e32621e88de8f4314b54 is affected Version 3bc6317033f365ce578eb6039445fb66162722fd is affected Version 836e625b03a666cf93ff5be328c8cb30336db872 is affected affected from 6.6.88 to 6.6.140 (excl.) affected from 6.12.24 to 6.12.86 (excl.) affected from 5.4.293 to 5.5 (excl.) affected from 5.10.237 to 5.11 (excl.) affected from 5.15.181 to 5.16 (excl.) affected from 6.1.135 to 6.2 (excl.) affected from 6.13.12 to 6.14 (excl.) affected from 6.14.3 to 6.15 (excl.)

Vendor	Linux
Product	Linux
Versions	Default: affected Version 6.15 is affected unaffected from 0 to 6.15 (excl.) unaffected from 6.6.140 to 6.6.* (incl.) unaffected from 6.12.86 to 6.12.* (incl.) unaffected from 6.18.27 to 6.18.* (incl.) unaffected from 7.0.4 to 7.0.* (incl.) unaffected from 7.1-rc1 to * (incl.)