CVE-2026-98168
Received
Received - Intake
Buffer Overflow in Linux Kernel SMB Client
Vulnerability report for CVE-2026-98168, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-06
Last updated on: 2026-10-06
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
In cifs_query_reparse_point(), the start >= end check before casting to
struct reparse_data_buffer * only ensures the start pointer is within the
response. It fails to verify that there is enough space remaining for the
fixed 8-byte header of the structure.
If a server provides a DataOffset that leaves less than 8 bytes remaining,
the check passes, but subsequent reads of ReparseTag and ReparseDataLength
will occur out-of-bounds.
Fix this by ensuring the remaining space is at least the size of the
reparse_data_buffer structure before accessing its fields.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | 48ca7139ab7f0bbed95ff7a901ea497017769657 |
| Linux | Linux | 56e84c64fc257a95728ee73165456b025c48d408 |
| Linux | Linux | 56e84c64fc257a95728ee73165456b025c48d408 |
| Linux | Linux | 56e84c64fc257a95728ee73165456b025c48d408 |
| Linux | Linux | 848d78e3625f15de09d34a562dc49a98b78a62f3 |
| Linux | Linux | c13b779d26b3702fba8f7d5fe757aba5bda85fd0 |
| Linux | Linux | 6.12.34 |
| Linux | Linux | 6.6.94 |
| Linux | Linux | 6.15.3 |
| Linux | Linux | 6.16 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
