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CVE-2026-111140— libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data

Quick assessment

Affected
libyal libregf
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.

libregf 版本至 20260526 存在堆越界读取漏洞，该漏洞出现在 函数中，原因是代码在计算值数据（value data）大小的边界时，未减去旧格式（old-format）单元偏移量所需的 4 字节。攻击者可构造特制的版本 1.0/1.1 REGF 注册表 hive 文件，使其值数据单元恰好位于 hive bin 末尾，从而泄露相邻的堆内存字节，或导致如 regfexport 和 plaso 等解析器崩溃。

CVSS 6.1 · Medium EPSS 0.13% · P2

Affected Version Matrix 1

VendorProduct Version RangeStatus
libyal libregf ≤ 20260526 affected
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I. Basic Information for CVE-2026-111140

Vulnerability Information
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Vulnerability Title
libregf through 20260526 Heap Out-of-Bounds Read via libregf_value_item_read_value_data
Source: CVE Program / CVE List V5
Vulnerability Description
libregf through 20260526 contains a heap out-of-bounds read in libregf_value_item_read_value_data() because it bounds value data size without subtracting the 4-byte old-format cell offset. Attackers can supply a crafted version 1.0/1.1 REGF hive with a value data cell ending its hive bin to leak adjacent heap bytes or crash parsers like regfexport and plaso.
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 libregf 0 ~ 20260526 -

II. Public POCs for CVE-2026-111140

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III. Intelligence Information for CVE-2026-111140

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Vendor Advisories for CVE-2026-111140 (1)

Proof of Concept for CVE-2026-111140 (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-2026-111147 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-2026-111134 6.1 MEDIUM libfwsi through 20260522 Heap Out-of-Bounds Read via libfwsi_mtp_file_entry_values_read_da
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 vendor: libyal
Same weakness: CWE-125

V. Comments for CVE-2026-111140

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