CVE-2023-0049 — Out-of-bounds Read in GitHub repository vim/vim prior to 9

Out-of-bounds Read in GitHub repository vim/vim prior to 9.0.1143.

01What is this vulnerability?

Out-of-bounds Read in GitHub repository vim/vim prior to 9.0.1143.

02Affected products

Vendor	Product	Versions
vim	vim/vim	unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-01-04T00:00:00.000Z
• Last modified: 2025-04-09T15:43:22.524Z

09References

• huntr.dev — https://huntr.dev/bounties/5e6f325c-ba54-4bf0-b050-dca048fd3fd9
• github.com — https://github.com/vim/vim/commit/7b17eb4b063a234376c1ec909ee293e42cff290c
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• support.apple.com — https://support.apple.com/kb/HT213670
• seclists.org — http://seclists.org/fulldisclosure/2023/Mar/17
• security.gentoo.org — https://security.gentoo.org/glsa/202305-16