CVE-2025-71150

Summary

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: Fix refcount leak when invalid session is found on session lookup

When a session is found but its state is not SMB2_SESSION_VALID, It indicates that no valid session was found, but it is missing to decrement the reference count acquired by the session lookup, which results in a reference count leak. This patch fixes the issue by explicitly calling ksmbd_user_session_put to release the reference to the session.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2107ab40629aeabbec369cf34b8cf0f288c3eb1b < 11fe566b442e3bc2774191740fd377739a87a1c0affected
LinuxLinux37a0e2b362b3150317fb6e2139de67b1e29ae5ff < 0fb87b28cafae71e9c8248432cc3a6a1fd759efcaffected
LinuxLinux450a844c045ff0895d41b05a1cbe8febd1acfcfd < e54fb2a4772545701766cba08aab20de5eace8cdaffected
LinuxLinuxa39e31e22a535d47b14656a7d6a893c7f6cf758c < 02e06785e85b4bd86ef3d23b7c8d87acc76773d5affected
LinuxLinuxb95629435b84b9ecc0c765995204a4d8a913ed52 < 8cabcb4dd3dc85dd83a37d26efcc59a66a4074d7affected
LinuxLinuxb95629435b84b9ecc0c765995204a4d8a913ed52 < cafb57f7bdd57abba87725eb4e82bbdca4959644affected
LinuxLinux5.15.176 < 5.15.203affected
LinuxLinux6.1.121 < 6.1.160affected
LinuxLinux6.6.67 < 6.6.120affected
LinuxLinux6.12.6 < 6.12.64affected
LinuxLinux6.13affected
LinuxLinux0 < 6.13unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.160 <= 6.1.*unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.64 <= 6.12.*unaffected
LinuxLinux6.18.3 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References