Insertion of Sensitive Information Into Sent Data in Linux kernel - CVE-2026-90220
Published: September 18, 2026
Vulnerability identifier: #VU151262
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-90220
CWE-ID: CWE-201
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to improper sanitization of an embedded variable-length event in bounce_error_event() when reading a bounce event for a queued variable-length event sent to a nonexistent port. A local user can set SNDRV_SEQ_FILTER_BOUNCE, queue a variable-length event, and read the bounce event to disclose sensitive information.
The disclosure consists of eight bytes on 64-bit systems from the client's own pool.
Affected software
Linux kernel
How to mitigate CVE-2026-90220
Install security update from vendor's repository.