CVE-2025-40285
High
Description
In the Linux kernel, the following vulnerability has been resolved: smb/server: fix possible refcount leak in smb2_sess_setup() Reference count of ksmbd_session will leak when session need reconnect. Fix this by adding the missing ksmbd_user_session_put().
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux
PublishedDec 6, 2025
First seenDec 6, 2025
How to fix
Update
- Linux Linux6fc935f798d44a8eb8a5e6659198399fbf57b981, e671f9bb97805771380c98de944e2ceab6949188, dcc51dfe6ff26b52cac106865a172ac982d78401, d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d, 379510a815cb2e64eb0a379cb62295d6ade65df0, 6.1.159, 6.6.117, 6.12.59, 5.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 37a0e2b362b3150317fb6e2139de67b1e29ae5ff ≤ v < 6fc935f798d44a8eb8a5e6659198399fbf57b981, 450a844c045ff0895d41b05a1cbe8febd1acfcfd ≤ v < e671f9bb97805771380c98de944e2ceab6949188, a39e31e22a535d47b14656a7d6a893c7f6cf758c ≤ v < dcc51dfe6ff26b52cac106865a172ac982d78401, b95629435b84b9ecc0c765995204a4d8a913ed52 ≤ v < d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d, b95629435b84b9ecc0c765995204a4d8a913ed52 ≤ v < 379510a815cb2e64eb0a379cb62295d6ade65df0, 2107ab40629aeabbec369cf34b8cf0f288c3eb1b, 6.1.121 ≤ v < 6.1.159, 6.6.67 ≤ v < 6.6.117, 6.12.6 ≤ v < 6.12.59, 5.15.176 ≤ v < 5.16, 6.13 | 6fc935f798d44a8eb8a5e6659198399fbf57b981, e671f9bb97805771380c98de944e2ceab6949188, dcc51dfe6ff26b52cac106865a172ac982d78401, d37b2c81c83d6c0d5ca582f4fe73c672983f9e0d, 379510a815cb2e64eb0a379cb62295d6ade65df0, 6.1.159, 6.6.117, 6.12.59, 5.16 |
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