CVE-2023-5344 | Heap-based Buffer Overflow in vim/vim

Exp

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1969.

Published: 2023-10-02 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-5344 is rated High Exploit Risk (68.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.19%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.13% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2023-5344

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-5344

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 1.19% +1.13%
2 2025-11-21 0.48% 0.06% -0.42%
3 2025-11-18 — 0.48% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-5344

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
4.0 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.5 1.4 [email protected]

Weakness enumeration for CVE-2023-5344

OS Trackers for CVE-2023-5344

vendor priority summary link
alpine medium CVE-2023-5344: 1 source package rows (vim); 8 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 6, open 2. https://security.alpinelinux.org/vuln/CVE-2023-5344
debian not yet assigned CVE-2023-5344 not yet assigned priority: Debian including 1 source packages (vim), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-5344
redhat low — https://access.redhat.com/security/cve/CVE-2023-5344
suse medium — https://www.suse.com/security/cve/CVE-2023-5344/
ubuntu medium CVE-2023-5344 medium priority: Ubuntu including 1 source packages (vim), 8 status rows across 8 suites (bionic, focal, jammy, lunar, mantic, trusty, upstream, xenial): released 7, needs-triage 1. https://ubuntu.com/security/CVE-2023-5344

Affected software / configurations for CVE-2023-5344

Vendor Product Version Raw CPE
vim vim < 9.0.1969 cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraproject fedora 38 cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

References for CVE-2023-5344

URL Tags
http://seclists.org/fulldisclosure/2023/Dec/10
http://seclists.org/fulldisclosure/2023/Dec/11
http://seclists.org/fulldisclosure/2023/Dec/9
https://github.com/vim/vim/commit/3bd7fa12e146c6051490d048a4acbfba974eeb04 Patch
https://huntr.dev/bounties/530cb762-899e-48d7-b50e-dad09eb775bf Exploit Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/4W665GQBN6S6ZDMYWVF4X7KMFI7AQKJL/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/XPT7NMYJRLBPIALGSE24UWTY6F774GZW/
https://lists.fedoraproject.org/archives/list/[email protected]/message/ZOXBUJLJ5VSPN3YXWN7XZA4JDYKNE7GZ/ Mailing List
https://support.apple.com/kb/HT214036
https://support.apple.com/kb/HT214037
https://support.apple.com/kb/HT214038
https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html
cvelogic Threat Intelligence