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Vulnerability record · CVE-2023-48706 · published 22 November 2023

CVE-2023-48706: Fedoraproject fedora use after free vulnerability

Fedoraproject · Fedora

Vim is a UNIX editor that, prior to version 9.0.2121, has a heap-use-after-free vulnerability. When executing a `:s` command for the very first time and using a sub-replace-special atom inside the substitution part, it is possible that the recursive `:s` call causes free-ing of memory which may later then be accessed by the initial `:s` command. The user must intentionally execute the payload and the whole process is a bit tricky to do since it seems to work only reliably for the very first :s command. It may also cause a crash of Vim. Version 9.0.2121 contains a fix for this issue.

4.7 CVSS 3.1 Medium EPSS 0.54% · top 56.6% CWE-416 · Use after free
4.7CVSS 3.1 base score
0.54%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References, 4 tagged exploit
17 Sep 2026Last modified by NVD

Description

Vim is a UNIX editor that, prior to version 9.0.2121, has a heap-use-after-free vulnerability. When executing a `:s` command for the very first time and using a sub-replace-special atom inside the substitution part, it is possible that the recursive `:s` call causes free-ing of memory which may later then be accessed by the initial `:s` command. The user must intentionally execute the payload and the whole process is a bit tricky to do since it seems to work only reliably for the very first :s command. It may also cause a crash of Vim. Version 9.0.2121 contains a fix for this issue.

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2023/11/22/3 Mailing ListPatchThird Party Advisory
https://github.com/gandalf4a/crash_report/blob/main/vim/vim_huaf Exploit
https://github.com/vim/vim/commit/26c11c56888d01e298cd8044caf860f3c26f57bb Patch
https://github.com/vim/vim/pull/13552 Issue TrackingPatch
https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q ExploitVendor Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/DNMFS3IH74KEMMESOA3EOB6MZ Vendor Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/IVA7K73WHQH4KVFDJQ7ELIUD2 Vendor Advisory
https://security.netapp.com/advisory/ntap-20240105-0001/ Vendor Advisory
http://www.openwall.com/lists/oss-security/2023/11/22/3 Mailing ListPatchThird Party Advisory
https://github.com/gandalf4a/crash_report/blob/main/vim/vim_huaf Exploit
https://github.com/vim/vim/commit/26c11c56888d01e298cd8044caf860f3c26f57bb Patch
https://github.com/vim/vim/pull/13552 Issue TrackingPatch
https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q ExploitVendor Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/DNMFS3IH74KEMMESOA3EOB6MZ Vendor Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/IVA7K73WHQH4KVFDJQ7ELIUD2 Vendor Advisory
https://security.netapp.com/advisory/ntap-20240105-0001/ Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-48706), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.