---
id: CVE-2025-39787
title: >-
  kernel: Linux kernel: Denial of Service in MDT loader due to improper ELF
  header validation (CVE-2025-39787)
summary: >-
  A flaw was found in the Linux kernel's soc: qcom: mdt_loader component. This
  vulnerability allows a local attacker to cause a Denial of Service (DoS) by
  providing a specially crafted firmware buffer. The flaw occurs because the MDT
  loader …
severity: medium
cvss: 6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H'
cvssSource: vendor
cwe: CWE-125
vendor: Red Hat
product: Red Hat Enterprise Linux 10
affected:
  - enterprise_linux 10
published: '2025-09-11'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T22:56:09+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39787.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39787.json
  - url: 'https://access.redhat.com/security/cve/CVE-2025-39787'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2394649'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2025-39787'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-39787'
  - url: >-
      https://lore.kernel.org/linux-cve-announce/2025091151-CVE-2025-39787-227f@gregkh/T
  - url: 'https://git.kernel.org/stable/c/1096eb63ecfc8df90b70cd068e6de0c2ff204dfd'
  - url: 'https://git.kernel.org/stable/c/e1720eb32acf411c328af6a8c8f556c94535808e'
  - url: 'https://git.kernel.org/stable/c/0d59ce2bfc3bb13abe6240335a1bf7b96536d022'
  - url: 'https://git.kernel.org/stable/c/43d26997d88c4056fce0324e72f62556bc7e8e8d'
  - url: 'https://git.kernel.org/stable/c/981c845f29838e468a9bfa87f784307193a31297'
  - url: 'https://git.kernel.org/stable/c/87bfabb3b2f46827639173f143aa43f7cfc0a7e6'
  - url: 'https://git.kernel.org/stable/c/81278be4eb5f08ba2c68c3055893e61cc03727fe'
  - url: 'https://git.kernel.org/stable/c/9f9967fed9d066ed3dae9372b45ffa4f6fccfeef'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00172
epssPercentile: 0.06174
scores:
  vendor: 6
  cna: 7.8
ingestedAt: '2026-10-15T05:52:46.077Z'
---

## Overview

A flaw was found in the Linux kernel's soc: qcom: mdt_loader component. This vulnerability allows a local attacker to cause a Denial of Service (DoS) by providing a specially crafted firmware buffer. The flaw occurs because the MDT loader does not sufficiently validate the size of the ELF header and its section entry sizes (e_phentsize and e_shentsize), leading to a read past the end of the buffer.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39787.json)

**kernel: Linux kernel: Denial of Service in MDT loader due to improper ELF header validation** — rated Moderate by Red Hat. Released 2025-09-11, updated 2026-10-16.

Affected:

- Red Hat Enterprise Linux 10

No fix planned:

- Red Hat Enterprise Linux 10

Not affected:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9

## Remediation

Fix deferred

Workarounds / mitigations:

- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.