smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
Summary
| CVE | CVE-2026-98168 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-06 09:17:58 UTC |
| Updated | 2026-10-21 13:21:24 UTC |
| 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. |
Risk And Classification
EPSS: 0.002000000 probability, percentile 0.093010000 (date 2026-10-21)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 848d78e3625f15de09d34a562dc49a98b78a62f3 aa00eead258e4fe8158a3a3e2d65facf06274abd git | Not specified |
| CNA | Linux | Linux | affected 48ca7139ab7f0bbed95ff7a901ea497017769657 3d67f155fe5813cfb02a551a9a12d6ea06a902e9 git | Not specified |
| CNA | Linux | Linux | affected 56e84c64fc257a95728ee73165456b025c48d408 d1152c96a3002e3df6b9a5b007cecaa7b19b4f79 git | Not specified |
| CNA | Linux | Linux | affected 56e84c64fc257a95728ee73165456b025c48d408 8dc5db3a0e583ea8d31d0613cefd99e93e095c3c git | Not specified |
| CNA | Linux | Linux | affected 56e84c64fc257a95728ee73165456b025c48d408 5f0306e731e2f46e91419eae57eee3a241c055e0 git | Not specified |
| CNA | Linux | Linux | affected c13b779d26b3702fba8f7d5fe757aba5bda85fd0 git | Not specified |
| CNA | Linux | Linux | affected 6.6.94 6.6.160 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.34 6.12.112 semver | Not specified |
| CNA | Linux | Linux | affected 6.15.3 6.16 semver | Not specified |
| CNA | Linux | Linux | affected 6.16 | Not specified |
| CNA | Linux | Linux | unaffected 6.16 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.112 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.54 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.8 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/aa00eead258e4fe8158a3a3e2d65facf06274abd | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3d67f155fe5813cfb02a551a9a12d6ea06a902e9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5f0306e731e2f46e91419eae57eee3a241c055e0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8dc5db3a0e583ea8d31d0613cefd99e93e095c3c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d1152c96a3002e3df6b9a5b007cecaa7b19b4f79 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.