CVE-2022-3520 — Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0765.

01What is this vulnerability?

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0765.

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

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: 2022-12-02T00:00:00.000Z
• Last modified: 2025-04-23T18:32:44.163Z

09References

• huntr.dev — https://huntr.dev/bounties/c1db3b70-f4fe-481f-8a24-0b1449c94246
• github.com — https://github.com/vim/vim/commit/36343ae0fb7247e060abfd35fb8e4337b33abb4b
• security.gentoo.org — https://security.gentoo.org/glsa/202305-16