CVE-2026-98685: Linux kernel · smb: client: discard post-EOF pagecache when extending a file via clone range
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 4721587f96cb8de8164f3fd203093a0875560999 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 10:12 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 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4721587f96cb8de8164f3fd203093a0875560999, 15bb9f1d3e967e328649e92a1451e60a0dc66118, 6.7 +1
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 4721587f96cb8de8164f3fd203093a0875560999, 15bb9f1d3e967e328649e92a1451e60a0dc66118, 6.7 or 6.2.
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 6.2 and 6.7, as well as in specific commits identified by their hashes. Users should upgrade to these fixed versions to remediate the issue. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel SMB client was fixed where the pagecache beyond the end-of-file (EOF) was not properly discarded when extending a file via clone range. This could cause data dirtied past EOF through mmap to become visible as file content after the file extension.