CVE-2025-68799

kernel: Linux kernel (caif): Integer underflow leads to memory exhaustion and information disclosure

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Severity

Important

Red Hat Product Security

8.1

CVSS 3.1

Review impact separately from score.

Published · January 13, 2026

Updated · August 21, 2026

Description

A flaw was found in the Linux kernel's caif component. A remote attacker could send a specially crafted packet with a small length field to an interface with Frame Check Sequence (FCS) disabled. This could lead to an integer underflow, causing memory exhaustion, kernel instability, and potential information disclosure if padding contains uninitialized kernel memory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CWE-191 · Integer Underflow (Wrap or Wraparound)