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CVE-2026-103658

Quick assessment

Affected
GNU Aspell
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.

GNU Aspell 版本 0.60.8.2 及之前版本在其只读词典加载器中存在一个基于堆的缓冲区溢出漏洞（CWE-122）。该问题源于 common/string.hpp 中的 String::reserve() 函数在计算容量时使用了有符号整数（(int)s + 1），当请求大小为 0x7FFFFFFF 时，该值会发生负数回绕，导致底层缓冲区从未被适当扩大。与此同时，modules/speller/default/readonly_ws.cpp 中的 ReadOnlyDict::load() 函数将来自 .rw

CVSS 5.9 · Medium EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
GNU Aspell 0.60.8.2 affected
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I. Basic Information for CVE-2026-103658

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
GNU Aspell 0.60.8.2 (first vulnerable version is not known) contains a heap-based buffer overflow write (CWE-122) in its read-only dictionary loader. String::reserve() in common/string.hpp computes its capacity check with a signed int ((int)s + 1), so a requested size of 0x7FFFFFFF wraps negative and the backing buffer is never grown. ReadOnlyDict::load() in modules/speller/default/readonly_ws.cpp passes the unvalidated 32-bit size fields from a .rws dictionary header into this path, so a crafted .rws file with a valid endian marker (12345678) and an oversized length field (e.g. lang_name_size = 0x7FFFFFFF) causes attacker-controlled data to be written out of bounds past an undersized heap allocation. An attacker who induces a victim to load a malicious dictionary — for example via aspell dump master <file> — can corrupt heap memory, resulting in denial of service and potentially code execution. Fixed in b830b6e and will be fixed in release 0.60.8.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNU Aspell 0.60.8.2 -

II. Public POCs for CVE-2026-103658

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III. Intelligence Information for CVE-2026-103658

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Vendor Advisories for CVE-2026-103658 (1)

IV. Related Vulnerabilities

Same product: Aspell
Same vendor: GNU
Same weakness: CWE-122

V. Comments for CVE-2026-103658

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