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CVE-2026-97564: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    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.

    Засегнати продукти

    • Linux Linux: 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди 91da70a2e5c6f54e1316d51e0e6911e78ef5e09a; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди 856cb3f05b49d23dc1542f78696e20c4ea6dd7de; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди f29c1ec0e7d8c887a91df3f93bb4617c0ac95c6a; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди 17c93bcd17755523c21abb22cbf2a41a6eb0caaf; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди e5964064e3fbe6325893408faff08ca33de0e2c3; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди 96751028c0d4dec785709ea3eb0ab38a4f2ded96; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди 1d3b24b16a0b013792e8f1e3ed060f0b46f537d1; 4d79dba0e00749fa40de8ef13a9b85ce57a1603b преди d9d7eeb0cea5b55b82888f443622fd8d4ee064f3
    • Linux Linux: 3.0; преди 3.0; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; от 7.3 нататък

    История

    • 25 септември 2026 Публикувано

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