What’s Vulnerable › Vulnerabilities

CVE-2024-41957: Vim double free in src/alloc.c:616

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-08-01 · updated 2026-06-17
• Weakness: CWE-415

Description

Vim is an open source command line text editor. Vim < v9.1.0647 has double free in src/alloc.c:616. When closing a window, the corresponding tagstack data will be cleared and freed. However a bit later, the quickfix list belonging to that window will also be cleared and if that quickfix list points to the same tagstack data, Vim will try to free it again, resulting in a double-free/use-after-free access exception. Impact is low since the user must intentionally execute vim with several non-default flags, but it may cause a crash of Vim. The issue has been fixed as of Vim patch v9.1.0647

Affected products

• vim/vim: before 9.1.0647 — fixed in 9.1.0647

How to fix

Upgrade to a fixed version: vim/vim 9.1.0647. Check the vendor advisory for mitigations.

References

• https://github.com/vim/vim/commit/8a0bbe7b8aad6f8da28dee218c01bc8a0185a
• https://github.com/vim/vim/security/advisories/GHSA-f9cr-gv85-hcr4
• http://seclists.org/fulldisclosure/2024/Sep/33
• http://www.openwall.com/lists/oss-security/2024/08/01/1
• https://security.netapp.com/advisory/ntap-20241129-0007/

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