CVE-2026-57451
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
In Vim before version 9.2.0670, a vulnerability was found in the get_text_props() function in src/textprop.c. The function reads a uint16 property count stored inline after a line's text and returns it as the number of 32-byte textprop_T entries that follow, without checking if the actual data amount is sufficient. A crafted line with a large count but little data causes reading past the end of the line buffer, potentially leading to a crash.
Risk Assessment
An attacker can deliver a malicious undo file containing such a crafted line, which when opened in Vim may cause the editor to crash. The risk includes potential data loss or interruption of user work.
Recommendation
Immediately update Vim to version 9.2.0670 or later, which contains the fix for this vulnerability.
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Original NVD description (English source)
Vim is an open source, command line text editor. Prior to 9.2.0670, get_text_props() in src/textprop.c reads a uint16 property count stored inline after a line's text and returns it as the number of 32-byte textprop_T entries that follow. The only check is a floor that guarantees room for a single entry; the count is never checked against the amount of data actually present. A line that declares a large count while carrying little data causes consumers to read far past the end of the line buffer. Such a line can be delivered through a crafted undo file, leading to a crash. This vulnerability is fixed in 9.2.0670.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS