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NVD / CVE Program· CNA GitHub_M

CVE-2024-43802: heap-buffer-overflow in ins_typebuf() in Vim < 9.1.0697

Noroxi assessment

Priority: Monitor (action score 18/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.29% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: vim (Alpine:v3.20) 9.1.0707-r0; vim (Debian:12) 2:9.0.1378-2+deb12u1; vim (Debian:13) 2:9.1.0698-1.

Low priority for now. Upgrade to vim (Alpine:v3.20) 9.1.0707-r0; vim (Debian:12) 2:9.0.1378-2+deb12u1; vim (Debian:13) 2:9.1.0698-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Vim is an improved version of the unix vi text editor. When flushing the typeahead buffer, Vim moves the current position in the typeahead buffer but does not check whether there is enough space left in the buffer to handle the next characters. So this may lead to the tb_off position within the typebuf variable to point outside of the valid buffer size, which can then later lead to a heap-buffer overflow in e.g. ins_typebuf(). Therefore, when flushing the typeahead buffer, check if there is enough space left before advancing the off position. If not, fall back to flush current typebuf contents. It's not quite clear yet, what can lead to this situation. It seems to happen when error messages occur (which will cause Vim to flush the typeahead buffer) in comnination with several long mappgins and so it may eventually move the off position out of a valid buffer size. Impact is low since it is not easily reproducible and requires to have several mappings active and run into some error condition. But when this happens, this will cause a crash. The issue has been fixed as of Vim patch v9.1.0697. Users are advised to upgrade. There are no known workarounds for this issue.

MediumCVSS 4.5 · v3.1—No exploit Fix available
Published
Aug 26, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 22th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
4.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • vim vim

    • < 9.1.0697affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.20vimbefore 9.1.0707-r09.1.0707-r0
Debian:12vimbefore 2:9.0.1378-2+deb12u12:9.0.1378-2+deb12u1
Debian:13vimbefore 2:9.1.0698-12:9.1.0698-1
openSUSE:Leap 15.6vimbefore 9.1.1101-150500.20.21.19.1.1101-150500.20.21.1
SUSE:Linux Enterprise Micro 5.3vimbefore 9.1.1101-150000.5.69.19.1.1101-150000.5.69.1
SUSE:Linux Enterprise Micro 5.5vimbefore 9.1.1101-150500.20.21.19.1.1101-150500.20.21.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5vimbefore 9.1.1101-17.41.19.1.1101-17.41.1
SUSE:Linux Micro 6.0vimbefore 9.1.1101-1.19.1.1101-1.1

Same product

vim: all records

Other highest-scoring records for the same primary product.

  • CVE-2008-2712Vim 7.1.314, 6.4, and other versions allows user-assisted remote attackers to execute arbitrary commands via Vim scripts that do not properl
    42Plan
  • CVE-2022-0318Heap-based Buffer Overflow in vim/vim
    40Plan
  • CVE-2019-12735getchar.c in Vim before 8.1.1365 and Neovim before 0.3.6 allows remote attackers to execute arbitrary OS commands via the :source! command i
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2024-43374Aug 15, 2024 · Vim heap-use-after-free in src/arglist.c:207
    18Monitor
  • ← EarlierCVE-2024-43790Aug 22, 2024 · heap-buffer-overflow in do_search() in Vim < 9.1.0689
    22Monitor
  • Later →CVE-2024-45306Sep 2, 2024 · heap-buffer-overflow in Vim
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:vim9.1.0707-r0 · Alpine:v3.20Package registry (OSV)
debian:vim2:9.0.1378-2+deb12u1 · Debian:12Package registry (OSV)
opensuse:vim9.1.1101-150500.20.21.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:vim9.1.1101-150500.20.21.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:vim9.1.1101-17.41.1 · SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-4781356 days apartHeap-based Buffer Overflow in vim/vim
    31Monitor
  • CVE-2023-4751358 days apartHeap-based Buffer Overflow in vim/vim
    31Monitor
  • CVE-2023-4738359 days apartHeap-based Buffer Overflow in vim/vim
    31Monitor
  • CVE-2023-5344329 days apartHeap-based Buffer Overflow in vim/vim
    30Monitor
  • CVE-2026-25749529 days apartHeap Overflow in Vim
    26Monitor
  • CVE-2024-437904 days apartheap-buffer-overflow in do_search() in Vim < 9.1.0689
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records