CVE-2026-74608

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_try_adding_channels() cifs_try_adding_channels() takes a temporary reference to an interface before dropping iface_lock. If cifs_ses_add_channel() fails, it drops that reference and then increments iface->weight_fulfilled. A concurrent interface list refresh can remove the list reference while channel creation is in progress. In that case, the failure-path kref_put() releases the last reference and frees iface. Updating weight_fulfilled afterward then accesses freed memory. Increment weight_fulfilled before dropping the temporary reference, keeping iface alive for the final access.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805
https://git.kernel.org/stable/c/1ffacbadc14530e55b8d86f7b917524f6a0fb891
https://git.kernel.org/stable/c/47dfac48bce7198ad4f1a388fc8c9491f878ac3b
https://git.kernel.org/stable/c/4986410316b1ae0e63c6ce418e4eb196723626e7
https://git.kernel.org/stable/c/64d7584e62ac8cdc750455c5fdc6008fc2de4f06
https://git.kernel.org/stable/c/c292d4686f717c03e5022fc4ae7c782f39a94915

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-22 16:16

Updated : 2026-08-25 06:18

NVD link : CVE-2026-74608

Mitre link : CVE-2026-74608

CVE.ORG link : CVE-2026-74608

JSON object : View

Products Affected

No product.

CWE

No CWE.

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