PT-2025-36275 · Linux+1 · Linux Kernel+1

Published 2025-08-10 · Updated 2025-09-06 · CVE-2025-39680

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains an out-of-bounds bug in the rtl9300 i2c smbus xfer function. The data->block[0] variable, sourced from user input, lacks proper validation, potentially leading to a buffer overflow. The issue is addressed by verifying the value of data->block[0] before use.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-02828

CVE-2025-39680

Affected Products

Astra Linux

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39680.json · Exploit
• https://git.kernel.org/stable/c/071e43fcba5ddd9a7813e6cc0aa10299eae41b21 · Patch
• https://git.kernel.org/stable/c/57f312b955938fc4663f430cb57a71f2414f601b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-39680 · Security Note
• https://bdu.fstec.ru/vul/2026-02828 · Security Note
• https://ubuntu.com/security/CVE-2025-39680 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-39680 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-39680 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-39680 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-39680 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-39680 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2025090545-CVE-2025-39680-9d9a@gregkh · Note
• https://git.kernel.org/linus/57f312b955938fc4663f430cb57a71f2414f601b · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/1964195473268568168 · Twitter Post