178 lines
9.0 KiB
JSON
178 lines
9.0 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2021-47508",
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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": "2024-05-22T06:20:56.206Z",
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"datePublished": "2024-05-24T15:01:54.048Z",
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"dateUpdated": "2026-05-11T13:56:00.397Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T13:56:00.397Z"
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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: free exchange changeset on failures\n\nFstests runs on my VMs have show several kmemleak reports like the following.\n\n unreferenced object 0xffff88811ae59080 (size 64):\n comm \"xfs_io\", pid 12124, jiffies 4294987392 (age 6.368s)\n hex dump (first 32 bytes):\n 00 c0 1c 00 00 00 00 00 ff cf 1c 00 00 00 00 00 ................\n 90 97 e5 1a 81 88 ff ff 90 97 e5 1a 81 88 ff ff ................\n backtrace:\n [<00000000ac0176d2>] ulist_add_merge+0x60/0x150 [btrfs]\n [<0000000076e9f312>] set_state_bits+0x86/0xc0 [btrfs]\n [<0000000014fe73d6>] set_extent_bit+0x270/0x690 [btrfs]\n [<000000004f675208>] set_record_extent_bits+0x19/0x20 [btrfs]\n [<00000000b96137b1>] qgroup_reserve_data+0x274/0x310 [btrfs]\n [<0000000057e9dcbb>] btrfs_check_data_free_space+0x5c/0xa0 [btrfs]\n [<0000000019c4511d>] btrfs_delalloc_reserve_space+0x1b/0xa0 [btrfs]\n [<000000006d37e007>] btrfs_dio_iomap_begin+0x415/0x970 [btrfs]\n [<00000000fb8a74b8>] iomap_iter+0x161/0x1e0\n [<0000000071dff6ff>] __iomap_dio_rw+0x1df/0x700\n [<000000002567ba53>] iomap_dio_rw+0x5/0x20\n [<0000000072e555f8>] btrfs_file_write_iter+0x290/0x530 [btrfs]\n [<000000005eb3d845>] new_sync_write+0x106/0x180\n [<000000003fb505bf>] vfs_write+0x24d/0x2f0\n [<000000009bb57d37>] __x64_sys_pwrite64+0x69/0xa0\n [<000000003eba3fdf>] do_syscall_64+0x43/0x90\n\nIn case brtfs_qgroup_reserve_data() or btrfs_delalloc_reserve_metadata()\nfail the allocated extent_changeset will not be freed.\n\nSo in btrfs_check_data_free_space() and btrfs_delalloc_reserve_space()\nfree the allocated extent_changeset to get rid of the allocated memory.\n\nThe issue currently only happens in the direct IO write path, but only\nafter 65b3c08606e5 (\"btrfs: fix ENOSPC failure when attempting direct IO\nwrite into NOCOW range\"), and also at defrag_one_locked_target(). Every\nother place is always calling extent_changeset_free() even if its call\nto btrfs_delalloc_reserve_space() or btrfs_check_data_free_space() has\nfailed."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/delalloc-space.c"
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],
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"versions": [
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{
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"version": "364ecf3651e0862152c8b340d7cb3021dc0122c7",
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"lessThan": "ca06c5cb1b6dbfe67655b33c02fc394d65824519",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "364ecf3651e0862152c8b340d7cb3021dc0122c7",
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"lessThan": "da5e817d9d75422eaaa05490d0b9a5e328fc1a51",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/delalloc-space.c"
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],
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"versions": [
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{
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"version": "4.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.8",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.16",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.13",
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"versionEndExcluding": "5.15.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.13",
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"versionEndExcluding": "5.16"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ca06c5cb1b6dbfe67655b33c02fc394d65824519"
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},
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{
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"url": "https://git.kernel.org/stable/c/da5e817d9d75422eaaa05490d0b9a5e328fc1a51"
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}
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],
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"title": "btrfs: free exchange changeset on failures",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2024-08-04T05:39:59.770Z"
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},
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/ca06c5cb1b6dbfe67655b33c02fc394d65824519",
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"tags": [
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"x_transferred"
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]
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},
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{
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"url": "https://git.kernel.org/stable/c/da5e817d9d75422eaaa05490d0b9a5e328fc1a51",
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"tags": [
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"x_transferred"
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]
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}
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]
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},
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2021-47508",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2024-09-10T15:35:39.656794Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2024-09-11T17:33:22.299Z"
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}
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}
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]
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}
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} |