CVE-2026-74542
Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix folio_queue ENOMEM in writeback by adding a mempool Fix the handling of folio_queue allocation failure in writeback by adding a mempool and passing in gfp_t flags to the rolling buffer functions that allocate memory, using the mempool if gfp != GFP_KERNEL. This is then extended upwards and the gfp to be used for a request is stored in the netfs_io_request struct and is then used for both requests and subrequests, eliminating the sleeping loops there. The failure caused: folio != NULL WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919
How to fix
- Linux Linuxb343252d6f536203dd0660f676190dcbf6d2ecdc, 15ed8a9b7c63e9171f5139a6aaa1ffb61809861f, 3f6d7f8a5416d852648d15a05e895f1195ee8a85, 1d78d56c43ef3768183e8370e7367b162700e049 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | cd0277ed0c188dd40e7744e89299af7b78831ca4 ≤ v < b343252d6f536203dd0660f676190dcbf6d2ecdc, cd0277ed0c188dd40e7744e89299af7b78831ca4 ≤ v < 15ed8a9b7c63e9171f5139a6aaa1ffb61809861f, cd0277ed0c188dd40e7744e89299af7b78831ca4 ≤ v < 3f6d7f8a5416d852648d15a05e895f1195ee8a85, cd0277ed0c188dd40e7744e89299af7b78831ca4 ≤ v < 1d78d56c43ef3768183e8370e7367b162700e049, 6.12 | b343252d6f536203dd0660f676190dcbf6d2ecdc, 15ed8a9b7c63e9171f5139a6aaa1ffb61809861f, 3f6d7f8a5416d852648d15a05e895f1195ee8a85, 1d78d56c43ef3768183e8370e7367b162700e049 |
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