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CVE-2026-110598— Libyal libpff through 20260926 heap out-of-bounds read via libpff_record_entry_get_multi_value

Quick assessment

Affected
libyal libpff
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.

Libyal libpff（截至 20260926 版本）在 libpff_record_entry_get_multi_value() 函数中存在整数下溢漏洞，攻击者可通过构造非单调递增的多值偏移量，触发堆越界读取。攻击者能够精心构造 PST、OST 或 PAB 文件，其中包含递减的 PT_MV_STRING8、PT_MV_UNICODE 或 PT_MV_BINARY 偏移量，从而导致 libpff、pypff 或 pffexport 程序崩溃，并暴露相邻的堆内存内容。

CVSS 6.1 · Medium EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
libyal libpff ≤ 20260926 affected
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I. Basic Information for CVE-2026-110598

Vulnerability Information
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Vulnerability Title
Libyal libpff through 20260926 heap out-of-bounds read via libpff_record_entry_get_multi_value
Source: CVE Program / CVE List V5
Vulnerability Description
Libyal libpff through 20260926 contains an integer underflow in libpff_record_entry_get_multi_value() that allows attackers to trigger heap out-of-bounds reads via non-monotonic multi-value offsets. Attackers can craft PST, OST or PAB files with decreasing PT_MV_STRING8, PT_MV_UNICODE or PT_MV_BINARY offsets to crash libpff, pypff or pffexport and expose adjacent heap memory.
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 libpff 0 ~ 20260926 -

II. Public POCs for CVE-2026-110598

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III. Intelligence Information for CVE-2026-110598

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Other References for CVE-2026-110598 (2)

IV. Related Vulnerabilities

Same vendor: libyal
Same weakness: CWE-125

V. Comments for CVE-2026-110598

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