CVE-2026-98864: Linux kernel · sched_ext: Wait for SCX_OPSS_DISPATCHING before reenqueueing a task
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to 43457bf6550044c40bd6d3fcdf9ea66f5a55d139 or 7de9a6fb44eae4f05e68c805d58b9c618815adfa when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 43457bf6550044c40bd6d3fcdf9ea66f5a55d139, 7de9a6fb44eae4f05e68c805d58b9c618815adfa
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Linux kernel to 43457bf6550044c40bd6d3fcdf9ea66f5a55d139 or 7de9a6fb44eae4f05e68c805d58b9c618815adfa.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
The issue is fixed in the Linux kernel versions identified by commits 43457bf6550044c40bd6d3fcdf9ea66f5a55d139 and 7de9a6fb44eae4f05e68c805d58b9c618815adfa. Users should update to these fixed versions to remediate the vulnerability.
Description
A synchronization issue in the Linux kernel's scheduler extension (sched_ext) was fixed by ensuring that the system waits for the SCX_OPSS_DISPATCHING state to clear before reenqueueing a task. Previously, a task could be requeued prematurely during dispatch, causing the dispatcher's final state update to overwrite the queued state and drop subsequent dispatches of that task.