SB2026011213 - Red Hat Enterprise Linux 9 update for kernel
Published: January 12, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2025-39806)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the mt_report_fixup() function in drivers/hid/hid-multitouch.c. A local user can perform a denial of service (DoS) attack.
2) Out-of-bounds read (CVE-ID: CVE-2025-39840)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the audit_compare_dname_path() function in kernel/auditfilter.c. A local user can perform a denial of service (DoS) attack.
3) Improper error handling (CVE-ID: CVE-2025-39883)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the unpoison_memory() function in mm/memory-failure.c. A local user can perform a denial of service (DoS) attack.
4) NULL pointer dereference (CVE-ID: CVE-2025-40240)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the sctp_inq_pop() function in net/sctp/inqueue.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.