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

AI Predicted 3.3 Difficulty: Theoretical EPSS 0.03% · P10

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 29

VendorProductVersion RangeStatus
LinuxLinux76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3< dd98a5603a212ea9c96c6982ccdbcc748fdb9a56affected
f737418b6de31c962c7192777ee4018906975383< 153ab2c52355fbebcae622db8e7b506492c73a29affected
cf9291a3449b04688b81e32621e88de8f4314b54< b706d00206a9e82362a9633efbd8b5775650169baffected
362a90cecd36e8a5c415966d0b75b04a0270e4dd< 1bc1107a3a403a6d440673ed6666f7b07ef868a8affected
eb59cc31b6ea076021d14b04e7faab1636b87d0e< 097227f1ffe1a85bc3c359f81c71e3d40e06e920affected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< 1e6b0a69bf2c9c819255c7566e4355536d81d9cfaffected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< f072906688933bf47fabbaf63560be03357c8298affected
c8e008b60492cf6fd31ef127aea6d02fd3d314cd< 77d059519382bd66283e6a4e83ee186e87e7708faffected
… +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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 ~ dd98a5603a212ea9c96c6982ccdbcc748fdb9a56 -
LinuxLinux 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 · 276 CVEs total

CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459729.8 CRITICALsmb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-459707.8 HIGHbonding: alb: fix UAF in rlb_arp_recv during bond up/down
CVE-2026-460067.8 HIGHdrm/nouveau: fix u32 overflow in pushbuf reloc bounds check
CVE-2026-458787.8 HIGHdrm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-459427.8 HIGHext4: fix e4b bitmap inconsistency reports
CVE-2026-459317.8 HIGHaccel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-459847.8 HIGHgfs2: Fix use-after-free in iomap inline data write path
CVE-2026-459297.8 HIGHovpn: fix possible use-after-free in ovpn_net_xmit

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46046

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