SB2026080618 - Unchecked Return Value in Linux kernel net driver

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Main Vulnerability Database SB2026080618

SB2026080618 - Unchecked Return Value in Linux kernel net driver

Published: August 6, 2026

Security Bulletin ID SB2026080618
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Unchecked Return Value (CVE-ID: CVE-2026-64577)

CWE-ID: CWE-252 - Unchecked Return Value

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper handling of a failed buffer pull in gtp1u_send_echo_resp() in the Linux kernel GTP implementation when processing a crafted short echo request packet. A remote attacker can send a specially crafted packet to cause a kernel panic.

The issue is triggered by a 16 to 19 byte echo request that causes skb_pull_data() to fail while execution continues and skb data is moved below the buffer head.


Remediation

Install update from vendor's website.

References