Riskcovery

CVE-2026-74542

netfs: Fix folio_queue ENOMEM in writeback by adding a mempool

State
Published
Severity
Not scored
Published
Aug 15, 2026
Updated
Oct 21, 2026
Reserved
Aug 15, 2026

Read the record on cve.org

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

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • cd0277ed0c188dd40e7744e89299af7b78831ca4 to before b343252d6f536203dd0660f676190dcbf6d2ecdcAffected
  • cd0277ed0c188dd40e7744e89299af7b78831ca4 to before 15ed8a9b7c63e9171f5139a6aaa1ffb61809861fAffected
  • cd0277ed0c188dd40e7744e89299af7b78831ca4 to before 3f6d7f8a5416d852648d15a05e895f1195ee8a85Affected
  • cd0277ed0c188dd40e7744e89299af7b78831ca4 to before 1d78d56c43ef3768183e8370e7367b162700e049Affected
LinuxLinux
  • 6.12Affected
  • before 6.12Not affected
  • 6.12.114 through 6.12.*Not affected
  • 6.18.57 through 6.18.*Not affected
  • 7.1.8 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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