# CVE-2023-52339: libebml: In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing

CVE-2023-52339 is fixed in 3 products on 1 platform, first by libebml4v5 1.3.5-2ubuntu0.1+esm1, released January 11, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-52339
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0110
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 11, 2024

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libebml Debian 11.6 (bullseye) | 1.4.2-1+deb11u1 | [DLA-4023-1](https://patchblox.com/security/data/fix/linux/dla-4023-1.md) | Jan 20, 2025 |
| Linux | libebml Debian 12.15 (bookworm) | 1.4.4-1+deb12u1 | [DEBIAN-CVE-2023-52339](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52339.md) | Jan 12, 2024 |
| Linux | libebml Debian 13.5 (trixie) | 1.4.5-1 | [DEBIAN-CVE-2023-52339](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52339.md) | Jan 12, 2024 |
| Linux | libebml Debian 14 | 1.4.5-1 | [DEBIAN-CVE-2023-52339](https://patchblox.com/security/data/fix/linux/debian-cve-2023-52339.md) | Jan 12, 2024 |
| Linux | libebml4v5 Ubuntu 18.04.6 LTS (bionic) | 1.3.5-2ubuntu0.1+esm1 | [libebml4v5 1.3.5-2ubuntu0.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libebml4v5-1.3.5-2ubuntu0.1-esm1.md) | Jan 11, 2024 |
| Linux | libebml4v5 Ubuntu 20.04 LTS (focal) | 1.3.10-1ubuntu0.1~esm1 | [libebml4v5 1.3.10-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libebml4v5-1.3.10-1ubuntu0.1-esm1.md) | Jan 11, 2024 |
| Linux | libebml5 Ubuntu 22.04.1 LTS (jammy) | 1.4.2-2ubuntu0.1~esm1 | [libebml5 1.4.2-2ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libebml5-1.4.2-2ubuntu0.1-esm1.md) | Jan 11, 2024 |

---

Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.