# CVE-2026-15813: kronosnet: A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34)

CVE-2026-15813 is fixed in kronosnet on 1 platform, first by DEBIAN-CVE-2026-15813, released July 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-15813
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 20, 2026

## Description

A vulnerability was found in the network packet de-fragmentation engine of kronosnet (Version affected <= 1.34). The internal reassembly code does not properly validate sequence numbers of incoming payload fragments. An attacker can exploit this lack of verification by transmitting malformed packets with corrupted sequence parameters. Under specific conditions, this forces the packet processing layer to parse data outside the designated bounds of the internal memory structures, causing an out-of-bounds memory access or heap corruption. This behavior can result in sudden application crashes or system instability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | kronosnet Debian 14 | 1.35-1 | [DEBIAN-CVE-2026-15813](https://patchblox.com/security/data/fix/linux/debian-cve-2026-15813.md) | Jul 20, 2026 |
| Linux | kronosnet opensuse-leap 16.0 | 1.30-160000.4.1 | [OPENSUSE-SU-2026:21851-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21851-1.md) | Sep 15, 2026 |
| Linux | kronosnet sles 16.0 | 1.30-160000.4.1 | [SUSE-SU-2026:23782-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23782-1.md) | Sep 15, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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