CVE-2023-1170 — Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1376.

01What is this vulnerability?

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1376.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

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

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

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: 2023-03-03T23:15:11.830
• Last modified: 2026-09-18T15:37:44.827

09References

• github.com — https://github.com/vim/vim/commit/1c73b65229c25e3c1fd8824ba958f7cc4d604f9c
• huntr.dev — https://huntr.dev/bounties/286e0090-e654-46d2-ac60-29f81799d0a4
• 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…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• github.com — https://github.com/vim/vim/commit/1c73b65229c25e3c1fd8824ba958f7cc4d604f9c
• huntr.dev — https://huntr.dev/bounties/286e0090-e654-46d2-ac60-29f81799d0a4
• 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…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…