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CVE-2026-98168

Unknown

Last modified

CVE-2026-98168 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 48ca7139ab7f0bbed95ff7a901ea497017769657, < 3d67f155fe5813cfb02a551a9a12d6ea06a902e9; >= 56e84c64fc257a95728ee73165456b025c48d408, < d1152c96a3002e3df6b9a5b007cecaa7b19b4f79; >= 56e84c64fc257a95728ee73165456b025c48d408, < 8dc5db3a0e583ea8d31d0613cefd99e93e095c3c; >= 56e84c64fc257a95728ee73165456b025c48d408, < 5f0306e731e2f46e91419eae57eee3a241c055e0; 848d78e3625f15de09d34a562dc49a98b78a62f3; c13b779d26b3702fba8f7d5fe757aba5bda85fd0; >= 6.12.34, < 6.12.112; >= 6.6.94, < 6.7; >= 6.15.3, < 6.16
LinuxLinux6.16

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98168?
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.
How severe is CVE-2026-98168?
Severity scoring for CVE-2026-98168 is pending analysis.
How do I fix CVE-2026-98168?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST