CVE-2026-73075
Description
A flaw was found in Vim, an open-source text editor. This vulnerability involves an out-of-bounds memory access within the popup opacity handling feature. A local attacker could exploit this by using specially crafted Vim script, leading to an out-of-bounds read and a limited out-of-bounds write. While the editor is expected to continue functioning, this could potentially result in unexpected behavior or information disclosure.
Statement
Moderate: This flaw in Vim involves an out-of-bounds memory access during popup opacity handling. Exploitation requires a local attacker to execute specially crafted Vim script that utilizes specific popup window features, making user interaction a prerequisite. The impact is typically limited to an out-of-bounds read and a constrained write, which may lead to unexpected behavior but is not expected to result in immediate system compromise or arbitrary code execution.
None of the Red Hat products ship this vulnerable code. Hence, are not affected.
Mitigation
To mitigate this issue, users should avoid running untrusted Vim scripts or installing untrusted plugins. This vulnerability is triggered by the execution of malicious Vim script code, not merely by opening a file.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 4.4 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Required | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | Low | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
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