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CVE-2026-111134— libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_file_entry_values_read_data

Quick assessment

Affected
libyal libfwsi
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.

libfwsi 20260522 及之前版本在 函数中存在堆缓冲区越界读取漏洞。攻击者可通过构造恶意的 MTP 文件条目 shell 项，读取超出缓冲区边界的数据。具体而言，攻击者可在 文件、Jump List（跳转列表）或 ShellBags（壳袋项）中嵌入一个大小为 10 到 73 字节的 shell 项，其数据部分大小至少为 44 字节，从而导致使用 libfwsi 的应用程序崩溃。

CVSS 6.1 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 1

VendorProduct Version RangeStatus
libyal libfwsi ≤ 20260522 affected
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I. Basic Information for CVE-2026-111134

Vulnerability Information
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Vulnerability Title
libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_file_entry_values_read_data
Source: CVE Program / CVE List V5
Vulnerability Description
libfwsi through 20260522 contains a heap out-of-bounds read vulnerability in libfwsi_mtp_file_entry_values_read_data() that allows attackers to read past buffer bounds via crafted MTP file entry shell items. Attackers can embed a 10 to 73 byte shell item with item data size of 44 or more in .lnk files, jump lists or shell bags to crash libfwsi consumers.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
libyal libfwsi 0 ~ 20260522 -

II. Public POCs for CVE-2026-111134

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III. Intelligence Information for CVE-2026-111134

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Patches & Fixes for CVE-2026-111134 (1)

Vendor Advisories for CVE-2026-111134 (1)

Security Blog Posts for CVE-2026-111134 (1)

Other References for CVE-2026-111134 (1)

Same Patch Batch · libyal · 2026-10-15 · 6 CVEs total

CVE-2026-111159 6.1 MEDIUM libewf through 20260924 Heap Out-of-Bounds Read via L01 Extended Attribute Parsing
CVE-2026-111140 6.1 MEDIUM libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data
CVE-2026-111147 6.1 MEDIUM Libyal libesedb through 20260704 Heap Out-of-Bounds Read via libesedb_record_get_multi_val
CVE-2026-111135 6.1 MEDIUM libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_volume_values_read_data
CVE-2026-111133 6.1 MEDIUM libfsapfs through 20260921 Heap Out-of-Bounds Read via libfsapfs_key_encrypted_key_read_da

IV. Related Vulnerabilities

Same product: libfwsi
Same vendor: libyal
Same weakness: CWE-125

V. Comments for CVE-2026-111134

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