CVE-2026-98427: Linux kernel · net/sched: codel: bound the dropping loop per dequeue call
Affects Linux kernelSource CVE Database V5
Not known to be exploited : upgrade to bacd72289d34d8c05b7de5a12448b87b6dd93878 or 7f4a5ec6258fd7c92633ec4b0493fc51166d9398 soon.
Data as of 26 Oct 2026, 12:55 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in bacd72289d34d8c05b7de5a12448b87b6dd93878, 7f4a5ec6258fd7c92633ec4b0493fc51166d9398
Exploitation evidence
Disclosed: evidence found.
CVE published 14 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 bacd72289d34d8c05b7de5a12448b87b6dd93878 or 7f4a5ec6258fd7c92633ec4b0493fc51166d9398.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel versions identified by commits bacd72289d34d8c05b7de5a12448b87b6dd93878 and 7f4a5ec6258fd7c92633ec4b0493fc51166d9398. Users should update to these or later kernel versions to mitigate this vulnerability. No additional mitigation steps are required beyond applying the official patch.
Description
A vulnerability in the Linux kernel's CoDel (Controlled Delay) packet scheduler allows an unprivileged user to trigger a soft lockup by causing the dropping loop in the codel_dequeue() function to never advance, draining the entire backlog under the queueing discipline lock in one call. This occurs when very small interval values cause the control law step to round down to zero. The issue has been fixed by bounding the dropping loop to a maximum of 256 drops per dequeue call and ensuring the control law step is at least one tick.