CVE-2026-32249

Description

Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vims NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0u05bb]), 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.

Risk Information

Base Score

5.3

MODERATE

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

EPSS Score

Exploitation Probability

0.012

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234