--- title: "CVE-2024-43802\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2024-43802?format=md keywords: index, follow --- # CVE-2024-43802 Publication date 26 August 2024 Last updated 26 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **4.5 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2024-43802?format=md#impact-score) Toggle side navigation ## Description Vim is an improved version of the unix vi text editor. When flushing the typeahead buffer, Vim moves the current position in the typeahead buffer but does not check whether there is enough space left in the buffer to handle the next characters. So this may lead to the tb\_off position within the typebuf variable to point outside of the valid buffer size, which can then later lead to a heap-buffer overflow in e.g. ins\_typebuf(). Therefore, when flushing the typeahead buffer, check if there is enough space left before advancing the off position. If not, fall back to flush current typebuf contents. It's not quite clear yet, what can lead to this situation. It seems to happen when error messages occur (which will cause Vim to flush the typeahead buffer) in comnination with several long mappgins and so it may eventually move the off position out of a valid buffer size. Impact is low since it is not easily reproducible and requires to have several mappings active and run into some error condition. But when this happens, this will cause a crash. The issue has been fixed as of Vim patch v9.1.0697. Users are advised to upgrade. There are no known workarounds for this issue. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | vim | 24.10 oracular | Fixed 2:9.1.0496-1ubuntu6 | | 24.04 LTS noble | Fixed 2:9.1.0016-1ubuntu7.3 | | 22.04 LTS jammy | Fixed 2:8.2.3995-1ubuntu2.19 | | 20.04 LTS focal | Fixed 2:8.1.2269-1ubuntu5.25 | | 18.04 LTS bionic | Fixed 2:8.0.1453-1ubuntu1.13+esm10 Ubuntu Pro | | 16.04 LTS xenial | Fixed 2:7.4.1689-3ubuntu1.5+esm25 Ubuntu Pro | | 14.04 LTS trusty | Fixed 2:7.4.052-1ubuntu3.1+esm19 Ubuntu Pro | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) ### Get expanded security coverage with Ubuntu Pro Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use. [Get Ubuntu Pro](https://ubuntu.com/pro) [30-day free trial](https://ubuntu.com/pro/free-trial) ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 4.5 · Medium * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Local | | Attack complexity | High | | Privileges required | None | | User interaction | Required | | Scope | Unchanged | | Confidentiality impact | Low | | Integrity impact | Low | | Availability impact | Low | * Scores | Parameter | Value | | --- | --- | | Base score | 4.5 · Medium | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43802) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2024-43802) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2024-43802) * [Debian](https://security-tracker.debian.org/tracker/CVE-2024-43802) ### Related Ubuntu Security Notices (USN) + [USN-7048-1](https://usn.ubuntu.com/USN-7048-1) + Vim vulnerability + 1 October 2024 + [USN-7048-2](https://usn.ubuntu.com/USN-7048-2) + Vim vulnerability + 16 October 2024 ### Other references * * * *