CVE-2026-32249 (GCVE-0-2026-32249)
Vulnerability from cvelistv5
Published
2026-03-12 19:17
Modified
2026-03-13 16:16
Severity ?
5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CWE
  • CWE-476 - NULL Pointer Dereference
Summary
Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state->out1->out without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.
References
Impacted products
Vendor Product Version
vim vim Version: >= 9.1.0011, < 9.2.0137
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              "content": {
                "id": "CVE-2026-32249",
                "options": [
                  {
                    "Exploitation": "none"
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-13T16:16:20.237064Z",
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          "value": "Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim\u0027s NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state-\u003eout1-\u003eout without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137."
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            "attackComplexity": "LOW",
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            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
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      "references": [
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          "name": "https://github.com/vim/vim/security/advisories/GHSA-9phh-423r-778r",
          "tags": [
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          "url": "https://github.com/vim/vim/security/advisories/GHSA-9phh-423r-778r"
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    "dateReserved": "2026-03-11T14:47:05.686Z",
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    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
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