Answer in brief
CVE-2026-74608 records a Critical severity (CVSS 9.8) vulnerability in smb: client: Fix use-after-free in cifs_try_adding_channels(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cbc53148cc0946b72d62a3c53870cb22ce4ec284 <64d7584e62ac8cdc750455c5fdc6008fc2de4f06 || >=cff97d683a083b862a8bb24309e0f4d2d928128a <c292d4686f717c03e5022fc4ae7c782f39a94915 || >=6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <47dfac48bce7198ad4f1a388fc8c9491f878ac3b || >=6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <1ffacbadc14530e55b8d86f7b917524f6a0fb891 || >=6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805 || >=6aac002bcfd554aff6d3ebb55e1660d078d70ab0 <4986410316b1ae0e63c6ce418e4eb196723626e7 || 22a6c5b3425f327e7f4c3606a72277dce82c7d83 || >=6.1.78 <6.1.183 || >=6.6.17 <6.6.152 || >=6.7.5 <6.8 | 64d7584e62ac8cdc750455c5fdc6008fc2de4f06, c292d4686f717c03e5022fc4ae7c782f39a94915, 47dfac48bce7198ad4f1a388fc8c9491f878ac3b, 1ffacbadc14530e55b8d86f7b917524f6a0fb891, 1305eadc6a7d78a8d0a52eee29ddd2d9e8a27805, 4986410316b1ae0e63c6ce418e4eb196723626e7, 6.1.183, 6.6.152, 6.8 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Aug 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.