CVE-2026-73074
Vim is an open source, command line text editor. Prior to 9.2.0841, prop_add_one() in src/textprop.c uses the proplen value from get_text_props() to increment a uint16_t property count beyond 0xffff, wrapping the count to zero and copying existing text-property records into a heap allocation sized for none of them. This issue is fixed in version 9.2.0841.
CSIRTS triage
- What
- A heap buffer overflow exists in Vim's text property handling.
- Who is affected
- Vim instances processing files with specially crafted text properties.
- Urgency
- Unknown severity; assess if this is exploitable remotely or requires user interaction.
- Action
- Update Vim to a version with fixed text property handling.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownCVE-2026-73074: Vim is an open source, command line text editor. Prior to 9.2.0841, prop_add_one() in src/text…nvd · 2026-08-11
- unknownCVE-2026-73074: Vim: Heap Buffer Overflow in Text Property Handlingmsrc · 2026-08-11
External references
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[](https://www.csirts.com/cve/CVE-2026-73074)