247 lines
12 KiB
JSON
247 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveId": "CVE-2025-71268",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-03-17T09:08:18.457Z",
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"datePublished": "2026-03-18T17:40:58.080Z",
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"dateUpdated": "2026-10-19T18:25:25.013Z"
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},
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"dateUpdated": "2026-08-05T12:12:37.025Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix reservation leak in some error paths when inserting inline extent\n\nIf we fail to allocate a path or join a transaction, we return from\n__cow_file_range_inline() without freeing the reserved qgroup data,\nresulting in a leak. Fix this by ensuring we call btrfs_qgroup_free_data()\nin such cases."
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"value": "AV:N - A remote attacker can reach Btrfs writeback through a guest-writable ksmbd or anonymous NFS export backed by the affected filesystem, using write-through or flush operations to force inline extent insertion.\nAC:L - On a qgroup-enabled deployment, the attacker can prepare many small inline writes and create concurrent memory pressure to induce the vulnerable allocation or transaction-handle failure; no victim-controlled race is required.\nPR:N - A writable guest SMB share or anonymous NFS export requires no authenticated privileges or kernel capabilities.\nUI:N - The attacker directly submits the writes and flush requests without requiring victim action.\nS:U - The leak affects Btrfs qgroup accounting within the same kernel and filesystem security authority.\nC:N - The bug neither exposes data nor creates an out-of-bounds read, use-after-free, or other memory-disclosure primitive.\nI:N - The defect only fails to release an accounting reservation and does not corrupt memory or modify filesystem data.\nA:H - Leaked reservations remain charged to the subvolume and its ancestor qgroups after delalloc cleanup and inode eviction, potentially exhausting a shared limit and denying all further writes until quotas are reset or the filesystem is remounted."
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}
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]
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"version": "0",
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},
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"version": "6.18.10",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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},
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{
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"version": "6.19",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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"title": "btrfs: fix reservation leak in some error paths when inserting inline extent",
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"options": [
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{
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"version": "2.0.3",
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"timestamp": "2026-10-16T15:06:12.033724Z"
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