CVE-2026-46046ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 before dd98a5603a212ea9c96c6982ccdbcc748fdb9a56; from f737418b6de31c962c7192777ee4018906975383 before 153ab2c52355fbebcae622db8e7b506492c73a29; from cf9291a3449b04688b81e32621e88de8f4314b54 before b706d00206a9e82362a9633efbd8b5775650169b; 362a90cecd36e8a5c415966d0b75b04a0270e4dd builds before 1bc1107a3a403a6d440673ed6666f7b07ef868a8; from eb59cc31b6ea076021d14b04e7faab1636b87d0e before 097227f1ffe1a85bc3c359f81c71e3d40e06e920; from c8e008b60492cf6fd31ef127aea6d02fd3d314cd before 1e6b0a69bf2c9c819255c7566e4355536d81d9cf; from c8e008b60492cf6fd31ef127aea6d02fd3d314cd before f072906688933bf47fabbaf63560be03357c8298; from c8e008b60492cf6fd31ef127aea6d02fd3d314cd before 77d059519382bd66283e6a4e83ee186e87e7708f; and 11 more ranges | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.4.293 before 5.5; from 5.10.237 before 5.10.258; from 5.15.181 before 5.15.209; from 6.1.135 before 6.1.175; from 6.6.88 before 6.6.140; from 6.12.24 before 6.12.86; from 6.13.12 before 6.14; from 6.14.3 before 6.18.27; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/dd98a5603a212ea9c96c6982ccdbcc748fdb9a56patch
- https://git.kernel.org/stable/c/153ab2c52355fbebcae622db8e7b506492c73a29patch
- https://git.kernel.org/stable/c/b706d00206a9e82362a9633efbd8b5775650169bpatch
- https://git.kernel.org/stable/c/1bc1107a3a403a6d440673ed6666f7b07ef868a8patch
- https://git.kernel.org/stable/c/097227f1ffe1a85bc3c359f81c71e3d40e06e920patch
- https://git.kernel.org/stable/c/1e6b0a69bf2c9c819255c7566e4355536d81d9cfpatch
- https://git.kernel.org/stable/c/f072906688933bf47fabbaf63560be03357c8298patch
- https://git.kernel.org/stable/c/77d059519382bd66283e6a4e83ee186e87e7708fpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.