Security readout for executives and security teams
Plain-English summary
CVE-2022-3256 is a high-severity use-after-free issue in Vim before 9.0.0530. A user must interact with malicious or crafted content, but successful exploitation could affect confidentiality, integrity, and availability on systems where vulnerable Vim builds are used.
Executive priority
Treat as a standard high-priority endpoint and server maintenance item. It is not reported as actively exploited in the provided sources, but Vim is widely deployed and the impact rating is high.
Technical view
The CVE describes CWE-416 use-after-free in vim/vim prior to 9.0.0530. CVSS 7.8 rates it local, low complexity, no privileges required, with user interaction required and high confidentiality, integrity, and availability impact. Public sources identify an upstream fixing commit and downstream Fedora, Debian LTS, and Gentoo advisories.
Likely exposure
Exposure is most likely on developer workstations, admin jump hosts, servers, and container images that include Vim versions older than 9.0.0530 or unfixed downstream packages.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. The CVSS vector indicates local exploitation requiring user interaction, so risk centers on opening attacker-controlled files or content in a vulnerable Vim build.
Researcher notes
The source bundle identifies the affected boundary and upstream fix but does not include detailed exploit preconditions beyond the CVSS vector. Avoid assuming remote exploitability or active attacks without additional evidence.
Mitigation direction
- Update Vim to 9.0.0530 or a vendor-fixed package release.
- Apply relevant Fedora, Debian LTS, or Gentoo security updates where applicable.
- Check vendor advisories for fixed package versions in other distributions.
- Limit opening untrusted files in vulnerable Vim until updated.
Validation and detection
- Inventory Vim versions across workstations, servers, and base images.
- Flag Vim builds older than 9.0.0530 for remediation review.
- Confirm installed distro packages match the relevant security advisory fixes.
- Re-run vulnerability scanning after package updates are applied.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-3256 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://huntr.dev/bounties/8336a3df-212a-4f8d-ae34-76ef1f936bb3CVE reference
- https://github.com/vim/vim/commit/8ecfa2c56b4992c7f067b92488aa9acea5a454adCVE reference
- FEDORA-2022-40161673a3CVE reference · vendor-advisory
- FEDORA-2022-fff548cfabCVE reference · vendor-advisory
- FEDORA-2022-4bc60c32a2CVE reference · vendor-advisory
- [debian-lts-announce] 20221124 [SECURITY] [DLA 3204-1] vim security updateCVE reference · mailing-list
- GLSA-202305-16CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.