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Fencer Vulns
low 1.8

CVE-2026-75820 json

Integer Truncation Leading to Heap Corruption in GNU Aspell

published 2026-10-06 34 d ago modified 2026-10-06 33 d ago also EUVD-2026-93366

cvss
1.8
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits
0
none known

Summary

GNU Aspell contains an integer truncation vulnerability in the WritableDict::add() function in modules/speller/default/writable.cpp. When loading a personal wordlist, the word length is stored as a single byte, causing truncation for words whose length is a multiple of 256. This leads to heap corruption. An attacker can exploit this by convincing a user to run aspell with a crafted personal wordlist containing such a word, resulting in denial of service.

This issue was fixed in commit 782ce94e4dc71eaec4ee1bd945eb3b9c47c5387d which will be released in version 0.60.8.3.

Patch / fix

  • GNU Aspell 0.60.8.3
  • aspell Debian 14 0.60.8.2-4

debian advisories DEBIAN-CVE-2026-75820

  • aspell openSUSE Tumbleweed 0.60.8.2-2.1

opensuse advisories openSUSE-SU-2026:12079-1

  • aspell Azure Linux 3.0 0.60.8.1-2

azure linux advisories AZL-105966

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-75820 updated cvss 3.3

aspell: aspell: Denial of Service via integer truncation in wordlist processing

  • Red Hat Enterprise Linux 6 aspell 0.60.8.1-3.el10
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 aspell 0.60.8.1-3.el10 Red Hat Enterprise Linux 8 aspell, aspell 0.60.8.1-3.el10 Red Hat Enterprise Linux 9 aspell, aspell 0.60.8.1-3.el10 Red Hat Enterprise Linux 10 aspell 0.60.8.1-3.el10
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
34 d ago

Exploit prediction

0.13% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 1.8 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:L/SA:N
CNA 4.0 1.8 CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • GNU Aspell

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.