btrfs: handle lack of space when cleaning up verity items

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98279
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 09:18:17 UTC
Updated2026-10-06 09:18:17 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: btrfs: handle lack of space when cleaning up verity items When enable_verity() hits the qgroup limit, rollback_verity() needs its own metadata reservation. When the qgroup limit or lack of space refuses the rollback, the whole filesystem is forced read-only even though the qgroup limit was for one subvolume only. Also orphan cleanup at the next mount fails the same way, so the leftover items are never removed: with -EDQUOT the subvolume stays unreachable, and with -ENOSPC on a full filesystem the next read-write mount fails. Start transactions with btrfs_start_transaction_fallback_global_rsv() in btrfs_orphan_cleanup(), drop_verity_items() and rollback_verity(). Those calls only delete items and free the space in the end, so they may use the global reserve and skip the qgroup limit, which avoids -ENOSPC and -EDQUOT.

Risk And Classification

EPSS: 0.001730000 probability, percentile 0.061500000 (date 2026-10-06)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 146054090b0859b28fc39015c7704ccc3c3a347f 4b7ecabd87dc40998fe7870d7975279649229a3b git Not specified
CNA Linux Linux affected 146054090b0859b28fc39015c7704ccc3c3a347f efa5780b84f066f419a667f6b9542368b2f62074 git Not specified
CNA Linux Linux affected 146054090b0859b28fc39015c7704ccc3c3a347f 76bf149cd0298544631e756670b89c399c7acbca git Not specified
CNA Linux Linux affected 5.15 Not specified
CNA Linux Linux unaffected 5.15 semver Not specified
CNA Linux Linux unaffected 6.18.54 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.8 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/efa5780b84f066f419a667f6b9542368b2f62074 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/76bf149cd0298544631e756670b89c399c7acbca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4b7ecabd87dc40998fe7870d7975279649229a3b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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