CVE-2026-74542 is a vulnerability in Linux Kernel
Published on August 15, 2026
netfs: Fix folio_queue ENOMEM in writeback by adding a mempool
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
Products Associated with CVE-2026-74542
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Affected Versions
Linux:- Version cd0277ed0c188dd40e7744e89299af7b78831ca4 and below 3f6d7f8a5416d852648d15a05e895f1195ee8a85 is affected.
- Version cd0277ed0c188dd40e7744e89299af7b78831ca4 and below 1d78d56c43ef3768183e8370e7367b162700e049 is affected.
- Version 6.12 is affected.
- Before 6.12 is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2-rc6, <= * is unaffected.