SB20260928177 - Use-after-free in Linux kernel sched
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928177
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98017)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to a use-after-free in the Linux kernel traffic-control queueing discipline creation path when processing an RTM_NEWQDISC request with an invalid TCA_RATE attribute after binding a populated shared ingress block. A local user can send a crafted RTM_NEWQDISC request to cause memory corruption.
Remediation
Install update from vendor's website.