# CVE-2026-103658: 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 — 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. CVE-2026-103658 is fixed in 4 products on 1 platform, first by RHSA-2026:92615, released October 30, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-103658 - Priority: High - CVSS: 7.8 (Moderate) - EPSS: 0.0021 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 12, 2026 - Weakness: Heap-based Buffer Overflow - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-103658 ## Description GNU Aspell is a spell checker designed to eventually replace Ispell. It can either be used as a library or as an independent spell checker. Security Fix(es): * aspell: aspell: Arbitrary code execution via crafted dictionary file (CVE-2026-103658) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | aspell Debian 14 | 0.60.8.2-4 | [DEBIAN-CVE-2026-103658](https://patchblox.com/security/data/fix/linux/debian-cve-2026-103658.md) | Nov 1, 2026 | | Linux | aspell RHEL 8 | 12:0.60.6.1-23.el8_10 | [RHSA-2026:92615](https://patchblox.com/security/data/fix/linux/rhsa-2026-92615.md) | Oct 30, 2026 | | Linux | aspell RHEL 9 | 12:0.60.8-9.el9_8 | [RHSA-2026:92458](https://patchblox.com/security/data/fix/linux/rhsa-2026-92458.md) | Oct 30, 2026 | | Linux | aspell almalinux 8 | 12:0.60.6.1-23.el8_10 | [ALSA-2026:92615](https://patchblox.com/security/data/fix/linux/alsa-2026-92615.md) | Nov 7, 2026 | | Linux | aspell almalinux 9 | 12:0.60.8-9.el9_8 | [ALSA-2026:92458](https://patchblox.com/security/data/fix/linux/alsa-2026-92458.md) | Nov 7, 2026 | | Linux | aspell amzn 2023 | 12:0.60.8-7.amzn2023.0.3 | [ALAS2023-2026-3275](https://patchblox.com/security/data/fix/linux/alas2023-2026-3275.md) | Nov 7, 2026 | | Linux | aspell ol 8 | 12:0.60.6.1-23.el8_10 | [ELSA-2026-92615](https://patchblox.com/security/data/fix/linux/elsa-2026-92615.md) | Nov 7, 2026 | | Linux | aspell ol 9 | 12:0.60.8-9.el9_8 | [ELSA-2026-92458](https://patchblox.com/security/data/fix/linux/elsa-2026-92458.md) | Nov 7, 2026 | | Linux | aspell rocky 8 | 2:0.60.6.1-23.el8_10 | [RLSA-2026:92615](https://patchblox.com/security/data/fix/linux/rlsa-2026-92615.md) | Nov 7, 2026 | | Linux | aspell rocky 9 | 2:0.60.8-9.el9_8 | [RLSA-2026:92458](https://patchblox.com/security/data/fix/linux/rlsa-2026-92458.md) | Nov 7, 2026 | | Linux | aspell-debuginfo amzn 2023 | 12:0.60.8-7.amzn2023.0.3 | [ALAS2023-2026-3275](https://patchblox.com/security/data/fix/linux/alas2023-2026-3275.md) | Nov 7, 2026 | | Linux | aspell-debugsource amzn 2023 | 12:0.60.8-7.amzn2023.0.3 | [ALAS2023-2026-3275](https://patchblox.com/security/data/fix/linux/alas2023-2026-3275.md) | Nov 7, 2026 | | Linux | aspell-devel RHEL 8 | 12:0.60.6.1-23.el8_10 | [RHSA-2026:92615](https://patchblox.com/security/data/fix/linux/rhsa-2026-92615.md) | Oct 30, 2026 | | Linux | aspell-devel RHEL 9 | 12:0.60.8-9.el9_8 | [RHSA-2026:92458](https://patchblox.com/security/data/fix/linux/rhsa-2026-92458.md) | Oct 30, 2026 | | Linux | aspell-devel almalinux 8 | 12:0.60.6.1-23.el8_10 | [ALSA-2026:92615](https://patchblox.com/security/data/fix/linux/alsa-2026-92615.md) | Nov 7, 2026 | | Linux | aspell-devel almalinux 9 | 12:0.60.8-9.el9_8 | [ALSA-2026:92458](https://patchblox.com/security/data/fix/linux/alsa-2026-92458.md) | Nov 7, 2026 | | Linux | aspell-devel amzn 2023 | 12:0.60.8-7.amzn2023.0.3 | [ALAS2023-2026-3275](https://patchblox.com/security/data/fix/linux/alas2023-2026-3275.md) | Nov 7, 2026 | | Linux | aspell-devel ol 8 | 12:0.60.6.1-23.el8_10 | [ELSA-2026-92615](https://patchblox.com/security/data/fix/linux/elsa-2026-92615.md) | Nov 7, 2026 | | Linux | aspell-devel ol 9 | 12:0.60.8-9.el9_8 | [ELSA-2026-92458](https://patchblox.com/security/data/fix/linux/elsa-2026-92458.md) | Nov 7, 2026 | --- Data as of 2026-11-10T01:44:33Z UTC. 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