High 7.5Published Jan 23, 2026

CVE-2025-71150ksmbd: Fix refcount leak when invalid session is found on session lookup

Updated under an hour ago (Oct 28, 2026, 9:10 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	2107ab40629aeabbec369cf34b8cf0f288c3eb1b builds before 11fe566b442e3bc2774191740fd377739a87a1c0; 37a0e2b362b3150317fb6e2139de67b1e29ae5ff builds before 0fb87b28cafae71e9c8248432cc3a6a1fd759efc; from 450a844c045ff0895d41b05a1cbe8febd1acfcfd before e54fb2a4772545701766cba08aab20de5eace8cd; from a39e31e22a535d47b14656a7d6a893c7f6cf758c before 02e06785e85b4bd86ef3d23b7c8d87acc76773d5; from b95629435b84b9ecc0c765995204a4d8a913ed52 before 8cabcb4dd3dc85dd83a37d26efcc59a66a4074d7; from b95629435b84b9ecc0c765995204a4d8a913ed52 before cafb57f7bdd57abba87725eb4e82bbdca4959644; from 5.15.176 before 5.15.203; from 6.1.121 before 6.1.160; and 2 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 5.15.176 before 5.16; from 6.1.121 before 6.1.160; from 6.6.67 before 6.6.120; from 6.12.6 before 6.12.64; from 6.13.1 before 6.18.3; 6.13; 6.13; 6.13; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/11fe566b442e3bc2774191740fd377739a87a1c0
https://git.kernel.org/stable/c/0fb87b28cafae71e9c8248432cc3a6a1fd759efc	patch
https://git.kernel.org/stable/c/e54fb2a4772545701766cba08aab20de5eace8cd	patch
https://git.kernel.org/stable/c/02e06785e85b4bd86ef3d23b7c8d87acc76773d5	patch
https://git.kernel.org/stable/c/8cabcb4dd3dc85dd83a37d26efcc59a66a4074d7	patch
https://git.kernel.org/stable/c/cafb57f7bdd57abba87725eb4e82bbdca4959644	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.