CVE-2026-97564
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)
smb: client: reject userspace cifs.idmap descriptions
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.idmap descriptions cifs.idmap key descriptions carry authority-bearing fields (owner and group SIDs and uid/gid values in "os:"/"gs:"/"oi:"/"gi:" form) that the cifs.idmap upcall helper treats as kernel-originating inputs. Unlike its sibling cifs.spnego, the cifs.idmap key type has no vet_description hook, so userspace can create keys of this type through request_key(2)/add_key(2) and supply those fields without CIFS origin. A request_key(2) call with a non-NULL callout then drives a root usermodehelper upcall (/sbin/request-key -> cifs.idmap) that consumes the unvetted description in root context. Only accept cifs.idmap descriptions while CIFS is using its private root_cred to request the key. id_to_sid()/sid_to_id() already run under override_creds(root_cred), so the kernel-originated path is unaffected. This mirrors commit 3da1fdf4efbc ("smb: client: reject userspace cifs.spnego descriptions"), which applied the same restriction to cifs.spnego.
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) |
|---|---|---|---|---|---|
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | f29c1ec0e7d8c887a91df3f93bb4617c0ac95c6a | Unavailable | None listed |
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | 17c93bcd17755523c21abb22cbf2a41a6eb0caaf | Unavailable | None listed |
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | e5964064e3fbe6325893408faff08ca33de0e2c3 | Unavailable | None listed |
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | 96751028c0d4dec785709ea3eb0ab38a4f2ded96 | Unavailable | None listed |
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | 1d3b24b16a0b013792e8f1e3ed060f0b46f537d1 | Unavailable | None listed |
| 4d79dba0e00749fa40de8ef13a9b85ce57a1603b | affected | git | d9d7eeb0cea5b55b82888f443622fd8d4ee064f3 | 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) |
|---|---|---|---|---|---|
| 3.0 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.0 | Unavailable | None listed |
| 6.1.189 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.158 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.111 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.53 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.7 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |