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CVE-2026-46078— erofs: fix the out-of-bounds nameoff handling for trailing dirents

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erofs中尾部目录项nameoff处理存在越界读取，可能导致读取目录块之外数据。

CVSS 7.1 · High EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1207 · Rogue Domain Controller

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3aa8ec716e52c02360457fa018296629b4d0becf< a8ee527807f7d97e55ce2ef2906f7f34975eb1c7 affected
3aa8ec716e52c02360457fa018296629b4d0becf< aa16dca1b062355181ef215229eeac249d7c0d61 affected
3aa8ec716e52c02360457fa018296629b4d0becf< 80a23c6d1aba35be8746d74ac14e6ba5ae46da21 affected
3aa8ec716e52c02360457fa018296629b4d0becf< 222055e6b4063abd2d9e13c3d49bbd1724c50789 affected
3aa8ec716e52c02360457fa018296629b4d0becf< 48b27a955d22391c7f30169fa7b6b2e1977f1ce4 affected
3aa8ec716e52c02360457fa018296629b4d0becf< 8ebb951a284b7446e025afc7dc5e9516ef9a7214 affected
3aa8ec716e52c02360457fa018296629b4d0becf< 1d55445226c75ddd4e78b09b3e7d99109b28c366 affected
3aa8ec716e52c02360457fa018296629b4d0becf< d18a3b5d337fa412a38e776e6b4b857a58836575 affected
… +10 more rows
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I. Basic Information for CVE-2026-46078

Vulnerability Information
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Vulnerability Title
erofs: fix the out-of-bounds nameoff handling for trailing dirents
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: erofs: fix the out-of-bounds nameoff handling for trailing dirents Currently we already have boundary-checks for nameoffs, but the trailing dirents are special since the namelens are calculated with strnlen() with unchecked nameoffs. If a crafted EROFS has a trailing dirent with nameoff >= maxsize, maxsize - nameoff can underflow, causing strnlen() to read past the directory block. nameoff0 should also be verified to be a multiple of `sizeof(struct erofs_dirent)` as well [1]. [1] https://sashiko.dev/#/patchset/20260416063511.3173774-1-hsiangkao%40linux.alibaba.com
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
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erofs中尾部目录项nameoff处理存在越界读取，可能导致读取目录块之外数据。
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 3aa8ec716e52c02360457fa018296629b4d0becf ~ a8ee527807f7d97e55ce2ef2906f7f34975eb1c7 -
Linux Linux 4.19 -

II. Public POCs for CVE-2026-46078

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III. Intelligence Information for CVE-2026-46078

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Patches & Fixes for CVE-2026-46078 (8)

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

CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
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-2026-45951 7.8 HIGH bpf: Fix a potential use-after-free of BTF object
CVE-2026-45929 7.8 HIGH ovpn: fix possible use-after-free in ovpn_net_xmit
CVE-2026-46006 7.8 HIGH drm/nouveau: fix u32 overflow in pushbuf reloc bounds check
CVE-2026-46058 7.8 HIGH media: amphion: Fix race between m2m job_abort and device_run
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46078

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