CVE-2026-74608

CVE CVE-2026-74608EUVD EUVD-2026-64545Published 2026-08-22T15:31:55.000ZLast changed 2026-08-25T05:40:33.000ZCVSS 9.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux cff97d683a083b862a8bb24309e0f4d2d928128a <c292d4686f717c03e5022fc4ae7c782f39a94915; patch: 6.6.152; 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <4986410316b1ae0e63c6ce418e4eb196723626e7; 6.7.5 <6.8; patch: 6.1.183; patch: 6.18.45; 6.1.78 <6.1.183; 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805; 6.6.17 <6.6.152; 22a6c5b3425f327e7f4c3606a72277dce82c7d83; patch: 0; patch: 7.1.9; patch: 6.12.104; cbc53148cc0946b72d62a3c53870cb22ce4ec284 <64d7584e62ac8cdc750455c5fdc6008fc2de4f06; 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <47dfac48bce7198ad4f1a388fc8c9491f878ac3b; 6.8; 6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <1ffacbadc14530e55b8d86f7b917524f6a0fb891; patch: 7.2

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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