CVE-2026-31717
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ksmbd: validate owner of durable handle on reconnect
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate owner of durable handle on reconnect Currently, ksmbd does not verify if the user attempting to reconnect to a durable handle is the same user who originally opened the file. This allows any authenticated user to hijack an orphaned durable handle by predicting or brute-forcing the persistent ID. According to MS-SMB2, the server MUST verify that the SecurityContext of the reconnect request matches the SecurityContext associated with the existing open. Add a durable_owner structure to ksmbd_file to store the original opener's UID, GID, and account name. and catpure the owner information when a file handle becomes orphaned. and implementing ksmbd_vfs_compare_durable_owner() to validate the identity of the requester during SMB2_CREATE (DHnC).
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 8df4bcdb0a4232192b2445256c39b787d58ef14d | affected | git | 712cdf917e77a6444ce3836874829d770db20ee6 | Unavailable | None listed |
| c8efcc786146a951091588e5fa7e3c754850cb3c | affected | git | c7f0f0d01c88bdcb8b1694d7d321670013f7ed7d | Unavailable | None listed |
| c8efcc786146a951091588e5fa7e3c754850cb3c | affected | git | 00ce8d6789dae72d042a4522264964c72891ca37 | Unavailable | None listed |
| c8efcc786146a951091588e5fa7e3c754850cb3c | affected | git | c908c853f304a4969b5aa10eba0b50350cc65b80 | Unavailable | None listed |
| c8efcc786146a951091588e5fa7e3c754850cb3c | affected | git | 49110a8ce654bbe56bef7c5e44cce31f4b102b8a | Unavailable | None listed |
| 6.6.32 | affected | semver | 6.6.142 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.9 | Unavailable | None listed |
| 6.6.142 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.92 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.25 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.2 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |