CVE-2026-98684: Linux kernel · smb: client: flush and commit data before querying allocated ranges
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in f82242fe3109a3ef72f429540b5bdde08fbfb0e4 : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:05 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 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in f82242fe3109a3ef72f429540b5bdde08fbfb0e4, bf84e44ff0ed802778eafd7ecb623635379cb506, aa994489bd835547c191827acc460192e147032d +3
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 to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
AI-suggested
The vulnerability has been fixed in Linux kernel versions 5.11, 5.13, and 5.14. Users should upgrade to these or later kernel versions to mitigate the issue. No additional action is required beyond applying the official kernel updates.
Description
A vulnerability in the Linux kernel SMB client related to the handling of allocated ranges queries can cause data corruption when interacting with Windows servers. The issue arises because the client queries allocated ranges without first flushing and committing data, leading to zero-filling of live data due to incoherent server responses. This flaw has been fixed in Linux kernel versions 5.11, 5.13, and 5.14.