Heap-based Buffer Overflow in vim/vim
Priority LOW 39CWE-122Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.
Summary
vim is vulnerable to Heap-based Buffer Overflow
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01708 77th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial vim/vim (vim): 8.2.3581Red Hat: 5 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vim | vim/vim | before 8.2.3581 | 8.2.3581 | Patch available | CNA |
- vim/vim Vendorvim Affected before 8.2.3581 Fixed in 8.2.3581 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:* | before 8.2.3581 | Vulnerable | vim |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:* Versions before 8.2.3581 Vulnerable ·vim
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
- Fix · CNA vim/vim (vim) Fixed in 8.2.3581
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
vim/vim — FEDORA-2021-cfadac570a
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-02835 Use of Uninitialized Variable in vim/vimPriority LOW 37
- Advisory ·
vim/vim — FEDORA-2021-58ab85548d
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2021-02835 Use of Uninitialized Variable in vim/vimPriority LOW 37
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | — |
Not affected: 1 product
- Red Hat Advanced Cluster Management for Kubernetes 2
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3927
- 2026-10-03 Alias added: GHSA-rr2m-vc2c-p73r
- 2026-10-08 CISA SSVC decision points changed
- 2026-11-07 Affected versions changed · Red Hat
References
More Vim vulnerabilities
- TI-2022-03248 Heap-based Buffer Overflow in vim/vim CVSS 3.1CRITICAL 9.8
- TI-2024-15103 Vim before 9.0.2142 has a stack-based buffer overflow because did_set_langmap in map.c… CVSS 3.1HIGH 7.8
- TI-2023-05093 Use After Free in vim/vim CVSS 3.1HIGH 7.8
- TI-2023-04407 Heap-based Buffer Overflow in vim/vim CVSS 3.1HIGH 7.8
- TI-2023-04379 Heap-based Buffer Overflow in vim/vim CVSS 3.1HIGH 7.8
- TI-2023-04378 Use After Free in vim/vim CVSS 3.1HIGH 7.8
Sources
- CVE-2021-3927 · CVE Program
- CVE-2021-3927 · NVD
- FIRST EPSS
- GHSA-rr2m-vc2c-p73r · GitHub Advisory Database · CC BY 4.0
- CVE-2021-3927 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences