CVE-2023-52339

Exp

In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.

Published: 2024-01-12 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-52339 is rated High Exploit Risk (63.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.46%). 1 public exploit reference(s) are indexed (Exploit-DB). 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-2023-52339

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

Exploit prediction scoring system (EPSS) score for CVE-2023-52339

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 2026-04-23 0.33% 0.46% +0.13%
2 2026-01-19 0.40% 0.33% -0.07%
3 2025-11-21 — 0.40% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-52339

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.
 2.8 3.6 [email protected]
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.
 2.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-52339

OS Trackers for CVE-2023-52339

vendor priority summary link
alpine — CVE-2023-52339: 1 source package rows (libebml); 6 state rows across 6 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, 3.23-community, edge-community); fixed 6, open 0. https://security.alpinelinux.org/vuln/CVE-2023-52339
debian not yet assigned CVE-2023-52339 not yet assigned priority: Debian including 1 source packages (libebml), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-52339
ubuntu medium CVE-2023-52339 medium priority: Ubuntu including 1 source packages (libebml), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 4, not-affected 4, ignored 3, released 1. https://ubuntu.com/security/CVE-2023-52339

Affected software / configurations for CVE-2023-52339

Vendor Product Version Raw CPE
matroska libebml < 1.4.5 cpe:2.3:a:matroska:libebml:*:*:*:*:*:*:*:*

References for CVE-2023-52339

URL Tags
https://github.com/Matroska-Org/libebml/blob/v1.x/NEWS.md Release Notes
https://github.com/Matroska-Org/libebml/compare/release-1.4.4...release-1.4.5 Release Notes
https://github.com/Matroska-Org/libebml/issues/147 Exploit Issue Tracking Patch Vendor Advisory
https://github.com/Matroska-Org/libebml/pull/148 Patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BJUXVOIRWPP7OFYUKQZDNJTSLWCPIZBH/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XNANFT4P6KL4WDQ3TV6QQ44NSC7WKLAB/
https://lists.debian.org/debian-lts-announce/2025/01/msg00016.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/BJUXVOIRWPP7OFYUKQZDNJTSLWCPIZBH/
https://lists.fedoraproject.org/archives/list/[email protected]/message/XNANFT4P6KL4WDQ3TV6QQ44NSC7WKLAB/
cvelogic Threat Intelligence