232 lines
11 KiB
JSON
232 lines
11 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-2021-46972",
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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": "2024-02-27T18:42:55.943Z",
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"datePublished": "2024-02-27T18:47:07.276Z",
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"dateUpdated": "2026-05-11T13:45:29.570Z"
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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": "2026-05-11T13:45:29.570Z"
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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\novl: fix leaked dentry\n\nSince commit 6815f479ca90 (\"ovl: use only uppermetacopy state in\novl_lookup()\"), overlayfs doesn't put temporary dentry when there is a\nmetacopy error, which leads to dentry leaks when shutting down the related\nsuperblock:\n\n overlayfs: refusing to follow metacopy origin for (/file0)\n ...\n BUG: Dentry (____ptrval____){i=3f33,n=file3} still in use (1) [unmount of overlay overlay]\n ...\n WARNING: CPU: 1 PID: 432 at umount_check.cold+0x107/0x14d\n CPU: 1 PID: 432 Comm: unmount-overlay Not tainted 5.12.0-rc5 #1\n ...\n RIP: 0010:umount_check.cold+0x107/0x14d\n ...\n Call Trace:\n d_walk+0x28c/0x950\n ? dentry_lru_isolate+0x2b0/0x2b0\n ? __kasan_slab_free+0x12/0x20\n do_one_tree+0x33/0x60\n shrink_dcache_for_umount+0x78/0x1d0\n generic_shutdown_super+0x70/0x440\n kill_anon_super+0x3e/0x70\n deactivate_locked_super+0xc4/0x160\n deactivate_super+0xfa/0x140\n cleanup_mnt+0x22e/0x370\n __cleanup_mnt+0x1a/0x30\n task_work_run+0x139/0x210\n do_exit+0xb0c/0x2820\n ? __kasan_check_read+0x1d/0x30\n ? find_held_lock+0x35/0x160\n ? lock_release+0x1b6/0x660\n ? mm_update_next_owner+0xa20/0xa20\n ? reacquire_held_locks+0x3f0/0x3f0\n ? __sanitizer_cov_trace_const_cmp4+0x22/0x30\n do_group_exit+0x135/0x380\n __do_sys_exit_group.isra.0+0x20/0x20\n __x64_sys_exit_group+0x3c/0x50\n do_syscall_64+0x45/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n ...\n VFS: Busy inodes after unmount of overlay. Self-destruct in 5 seconds. Have a nice day...\n\nThis fix has been tested with a syzkaller reproducer."
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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/overlayfs/namei.c"
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],
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"versions": [
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{
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"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe",
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"lessThan": "71d58457a8afc650da5d3292a7f7029317654d95",
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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": "6815f479ca90ee7fd2e28b2a420f796b974155fe",
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"lessThan": "cf3e3330bc5719fa9d658e3e2f596bde89344a94",
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"status": "affected",
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},
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{
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"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe",
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"lessThan": "d587cfaef72b1b6f4b2774827123bce91f497cc8",
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"status": "affected",
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},
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{
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"lessThan": "eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41",
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"status": "affected",
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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/overlayfs/namei.c"
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],
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"versions": [
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{
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"version": "5.8",
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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": "5.8",
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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": "5.10.35",
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"lessThanOrEqual": "5.10.*",
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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": "5.11.19",
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"lessThanOrEqual": "5.11.*",
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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": "5.12.2",
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"lessThanOrEqual": "5.12.*",
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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": "5.13",
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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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"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": "5.8",
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"versionEndExcluding": "5.10.35"
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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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"references": [
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"url": "https://git.kernel.org/stable/c/71d58457a8afc650da5d3292a7f7029317654d95"
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"url": "https://git.kernel.org/stable/c/cf3e3330bc5719fa9d658e3e2f596bde89344a94"
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{
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"url": "https://git.kernel.org/stable/c/d587cfaef72b1b6f4b2774827123bce91f497cc8"
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{
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"url": "https://git.kernel.org/stable/c/eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41"
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}
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],
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"title": "ovl: fix leaked dentry",
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-28T17:00:35.229463Z",
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"id": "CVE-2021-46972",
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"options": [
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{
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"Exploitation": "none"
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{
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
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"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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