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CVE-2026-46046— ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_xattr_inode_dec_ref_all函数中未释放iloc.bh，导致引用计数泄漏。

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 29

VendorProduct Version RangeStatus
Linux Linux 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3< dd98a5603a212ea9c96c6982ccdbcc748fdb9a56 affected
f737418b6de31c962c7192777ee4018906975383< 153ab2c52355fbebcae622db8e7b506492c73a29 affected
cf9291a3449b04688b81e32621e88de8f4314b54< b706d00206a9e82362a9633efbd8b5775650169b affected
362a90cecd36e8a5c415966d0b75b04a0270e4dd< 1bc1107a3a403a6d440673ed6666f7b07ef868a8 affected
eb59cc31b6ea076021d14b04e7faab1636b87d0e< 097227f1ffe1a85bc3c359f81c71e3d40e06e920 affected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< 1e6b0a69bf2c9c819255c7566e4355536d81d9cf affected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< f072906688933bf47fabbaf63560be03357c8298 affected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< 77d059519382bd66283e6a4e83ee186e87e7708f affected
… +21 more rows
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I. Basic Information for CVE-2026-46046

Vulnerability Information
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Vulnerability Title
ext4: fix missing brelse() in ext4_xattr_inode_dec_ref_all()
Source: CVE Program / CVE List V5
Vulnerability Description
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().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_xattr_inode_dec_ref_all函数中未释放iloc.bh，导致引用计数泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 ~ dd98a5603a212ea9c96c6982ccdbcc748fdb9a56 -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-46046

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III. Intelligence Information for CVE-2026-46046

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Patches & Fixes for CVE-2026-46046 (8)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45935 7.8 HIGH fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-45959 7.8 HIGH crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree
CVE-2026-45931 7.8 HIGH accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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