CVE-2026-31476
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: do not expire session on binding failure
In the Linux kernel, the following vulnerability has been resolved: ksmbd: do not expire session on binding failure When a multichannel session binding request fails (e.g. wrong password), the error path unconditionally sets sess->state = SMB2_SESSION_EXPIRED. However, during binding, sess points to the target session looked up via ksmbd_session_lookup_slowpath() -- which belongs to another connection's user. This allows a remote attacker to invalidate any active session by simply sending a binding request with a wrong password (DoS). Fix this by skipping session expiration when the failed request was a binding attempt, since the session does not belong to the current connection. The reference taken by ksmbd_session_lookup_slowpath() is still correctly released via ksmbd_user_session_put().
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) |
|---|---|---|---|---|---|
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | 4642ea35c03cf3d3558c009df4757cdb7af3f82d | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | f5300690c23c5ac860499bb37dbc09cf43fd62e6 | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | 6fafc4c4238e538969f1375f9ecdc6587c53f1cc | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | 1d1888b4a7aec518b707f6eca0bf08992c0e8da3 | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | a897064a457056acb976e20e3007cdf553de340f | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | e0e5edc81b241c70355217de7e120c97c3429deb | Unavailable | None listed |
| f5a544e3bab78142207e0242d22442db85ba1eff | affected | git | 9bbb19d21ded7d78645506f20d8c44895e3d0fb9 | 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) |
|---|---|---|---|---|---|
| 5.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.15 | Unavailable | None listed |
| 5.15.209 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.168 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.131 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.80 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.21 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.11 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |