netfs: Fix folio_queue ENOMEM in writeback by adding a mempool

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74542
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 13:17:59 UTC
Updated2026-08-17 06:19:51 UTC
DescriptionIn 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

Risk And Classification

EPSS: 0.001550000 probability, percentile 0.051990000 (date 2026-08-16)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected cd0277ed0c188dd40e7744e89299af7b78831ca4 3f6d7f8a5416d852648d15a05e895f1195ee8a85 git Not specified
CNA Linux Linux affected cd0277ed0c188dd40e7744e89299af7b78831ca4 1d78d56c43ef3768183e8370e7367b162700e049 git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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