CVE-2023-48706

MEDIUMNVD 4.74.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.7 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 64% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
4.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.7Exploit: None knownExposed: 0

A fix is available — apply it.

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 v3
4.7
EG Score
4.7(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity47% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

November 22, 2023

Last Modified

June 23, 2026

Advisory Details (8)

Auto-updated Jun 23, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github.
generic

crash_report/vim/vim_huaf at main · gandalf4a/crash_report · GitHub

https://github.com/gandalf4a/crash_report/blob/main/vim/vim_huaf
generic

oss-security - [vim-security] use-after-free in ex_substitute in Vim < v9.0.2121

http://www.openwall.com/lists/oss-security/2023/11/22/3
generic

NetApp Product Security

https://security.netapp.com/advisory/ntap-20240105-0001/
generic

[SECURITY] Fedora 38 Update: vim-9.0.2167-1.fc38 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/[email protected]/message/IVA7K73WHQH4KVFDJQ7ELIUD2WK5ZT5E/
generic

[SECURITY] Fedora 39 Update: vim-9.0.2167-1.fc39 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/[email protected]/message/DNMFS3IH74KEMMESOA3EOB6MZ56TWGFF/
github Patch Available🟡 PoC Available

heap-use-after-free in ex_substitute · Advisory · vim/vim · GitHub

Affected: Vim patch 9.0.2121.

https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q
github_pr

[use-after-free] in ex_substitute

Upstream fix in progress (PR #13552 · vim/vim, state=closed)

https://github.com/vim/vim/pull/13552
github_commit

commit 26c11c56888d (vim/vim)

Fix landed in vim/vim commit 26c11c56888d — awaiting tagged release

https://github.com/vim/vim/commit/26c11c56888d01e298cd8044caf860f3c26f57bb

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuvim-tiny (2:7.4.1689-3ubuntu1.5+esm22) @ xenial2026-05-24ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 46× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 127 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:15 UTCEPSS rescore
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  23. 2026-07-23 02:28 UTCEG score recompute
  24. 2026-07-22 23:14 UTCEG score recompute▲ 1.10
  25. 2026-07-22 14:06 UTCEPSS rescore
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  1. 2026-07-21 15:23 UTCEPSS rescore
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  45. 2026-06-23 21:31 UTCEPSS rescore
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  47. 2026-06-23 19:32 UTCNVD updateCVSS v3 → 4.7 · severity → MEDIUM
  48. 2026-06-22 14:24 UTCEPSS rescore
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  74. 2026-06-06 13:46 UTCEPSS rescore
  75. 2026-06-06 13:46 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-48706?
CVE-2023-48706 is a medium vulnerability published on November 22, 2023. 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…
When was CVE-2023-48706 disclosed?
CVE-2023-48706 was first published in the National Vulnerability Database on November 22, 2023, with the most recent update on June 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-48706 actively exploited?
CVE-2023-48706 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.6% of all scored CVEs.
What is the CVSS score of CVE-2023-48706?
CVE-2023-48706 has a CVSS v3 base score of 4.7 (NVD).
How do I remediate CVE-2023-48706?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-48706, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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