# CVE-2026-85234: tftp-hpa: A flaw was found in tftp-hpa

CVE-2026-85234 is fixed in 3 products on 1 platform, first by RHSA-2026:82280, released September 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-85234
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0047
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 15, 2026

## Description

A flaw was found in tftp-hpa. When the `in.tftpd` remap engine processes an inverse remap rule that also aborts with a non-empty custom error message, it can pass invalid match offsets to the `genmatchstring()` function. This leads to out-of-bounds read/write operations. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted request, causing the daemon to crash and resulting in a denial of service.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tftp RHEL 10 | 5.2-50.el10_2 | [RHSA-2026:82280](https://patchblox.com/security/data/fix/linux/rhsa-2026-82280.md) | Sep 15, 2026 |
| Linux | tftp RHEL 8 | 0:5.2-28.el8_10 | [RHSA-2026:78952](https://patchblox.com/security/data/fix/linux/rhsa-2026-78952.md) | Oct 9, 2026 |
| Linux | tftp RHEL 9 | 0:5.2-40.el9_8.1 | [RHSA-2026:80663](https://patchblox.com/security/data/fix/linux/rhsa-2026-80663.md) | Oct 12, 2026 |
| Linux | tftp almalinux 10 | 5.2-50.el10_2 | [ALSA-2026:82280](https://patchblox.com/security/data/fix/linux/alsa-2026-82280.md) | Nov 7, 2026 |
| Linux | tftp almalinux 8 | 5.2-28.el8_10 | [ALSA-2026:78952](https://patchblox.com/security/data/fix/linux/alsa-2026-78952.md) | Oct 8, 2026 |
| Linux | tftp almalinux 9 | 5.2-40.el9_8.1 | [ALSA-2026:80663](https://patchblox.com/security/data/fix/linux/alsa-2026-80663.md) | Nov 7, 2026 |
| Linux | tftp ol 10 | 0:5.2-50.el10_2 | [ELSA-2026-82280](https://patchblox.com/security/data/fix/linux/elsa-2026-82280.md) | Nov 7, 2026 |
| Linux | tftp ol 8 | 0:5.2-28.el8_10 | [ELSA-2026-78952](https://patchblox.com/security/data/fix/linux/elsa-2026-78952.md) | Oct 8, 2026 |
| Linux | tftp ol 9 | 0:5.2-40.el9_8.1 | [ELSA-2026-80663](https://patchblox.com/security/data/fix/linux/elsa-2026-80663.md) | Nov 7, 2026 |
| Linux | tftp rocky 10 | 0:5.2-50.el10 | [RLSA-2026:82280](https://patchblox.com/security/data/fix/linux/rlsa-2026-82280.md) | Nov 7, 2026 |
| Linux | tftp rocky 8 | 0:5.2-28.el8_10 | [RLSA-2026:78952](https://patchblox.com/security/data/fix/linux/rlsa-2026-78952.md) | Nov 7, 2026 |
| Linux | tftp rocky 9 | 0:5.2-40.el9_8.1 | [RLSA-2026:80663](https://patchblox.com/security/data/fix/linux/rlsa-2026-80663.md) | Nov 7, 2026 |
| Linux | tftp-hpa Debian 14 | 5.3+20251116-1 | [DEBIAN-CVE-2026-85234](https://patchblox.com/security/data/fix/linux/debian-cve-2026-85234.md) | Sep 17, 2026 |
| Linux | tftp-server RHEL 8 | 0:5.2-28.el8_10 | [RHSA-2026:78952](https://patchblox.com/security/data/fix/linux/rhsa-2026-78952.md) | Oct 9, 2026 |
| Linux | tftp-server RHEL 9 | 0:5.2-40.el9_8.1 | [RHSA-2026:80663](https://patchblox.com/security/data/fix/linux/rhsa-2026-80663.md) | Oct 12, 2026 |
| Linux | tftp-server almalinux 10 | 5.2-50.el10_2 | [ALSA-2026:82280](https://patchblox.com/security/data/fix/linux/alsa-2026-82280.md) | Nov 7, 2026 |
| Linux | tftp-server almalinux 8 | 5.2-28.el8_10 | [ALSA-2026:78952](https://patchblox.com/security/data/fix/linux/alsa-2026-78952.md) | Oct 8, 2026 |
| Linux | tftp-server almalinux 9 | 5.2-40.el9_8.1 | [ALSA-2026:80663](https://patchblox.com/security/data/fix/linux/alsa-2026-80663.md) | Nov 7, 2026 |
| Linux | tftp-server ol 10 | 0:5.2-50.el10_2 | [ELSA-2026-82280](https://patchblox.com/security/data/fix/linux/elsa-2026-82280.md) | Nov 7, 2026 |
| Linux | tftp-server ol 8 | 0:5.2-28.el8_10 | [ELSA-2026-78952](https://patchblox.com/security/data/fix/linux/elsa-2026-78952.md) | Oct 8, 2026 |
| Linux | tftp-server ol 9 | 0:5.2-40.el9_8.1 | [ELSA-2026-80663](https://patchblox.com/security/data/fix/linux/elsa-2026-80663.md) | Nov 7, 2026 |

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Data as of 2026-11-09T01:18:40Z 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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