312 lines
15 KiB
JSON
312 lines
15 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-2026-98990",
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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": "2026-09-25T10:25:14.384Z",
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"datePublished": "2026-10-23T12:20:09.349Z",
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"dateUpdated": "2026-10-30T12:40:44.542Z"
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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": "2026-10-30T12:40:44.542Z"
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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\nnamespace: check a submount for references right before unmounting it\n\nshrink_submounts() and mark_mounts_for_expiry() first collect all the\nmounts they are allowed to unmount and then unmount them.\n\nWhether a mount is busy is decided by propagate_mount_busy() on the\ntree. But unmounting the first mount changes the tree that the second\none propagates into. propagate_umount()\nmoves a surviving overmount off a copy it unmounts and mounts it where\nthe copy was mounted. If that's where the propagated copy of the second\nvictim is looked up the overmount becomes a candidate of the second\numount_tree(). It's childless and so trim_one() commits it without\nlooking at its reference count.\n\nSo a synchronous umount pulls out a busy mount that is in use somewhere\nelse and marks it MNT_SYNC_UMOUNT while it has users:\n\n umount2(/tmp/plshrink/p1, 0) = 0 errno 0\n cwd is (unreachable)\n\nThe same two umounts requested one after the other fail with EBUSY.\nThis needs a mount with MNT_SHRINKABLE, i.e., automounted submounts of\nNFS, AFS and CIFS or the tracefs mount below debugfs. Bind mounts\ninherit the flag.\n\nCheck each mount right before it is unmounted under the same hold of\nnamespace_sem and mount_lock as the umount itself. Make sure that the\nalgorithm stays linear."
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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/namespace.c"
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],
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"versions": [
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{
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"version": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "cda0c4e502a0f74a191471ce100fb061e5ab35d6",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "3f55f71291e4332983cd63b288d1f2be3c9c08fc",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "361f59e7f3f9a219fb5567bf9abc8482a154a399",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "f6394281834492c6516a405a348b545ae698a331",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "6e4012e571867868b545c91ca9d6095fdb709907",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "d73f04e92c1aab78d96ac6cadb234c8a3a373d22",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "18902a23ef36f83d32bafc58ae2484e6bb4bb8ef",
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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": "1064f874abc0d05eeed8993815f584d847b72486",
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"lessThan": "32bf92416614a1e3ff3524fc6b780259c7aad3ef",
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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": "5e6ef5ef6eaf690faad3a7c6c665ebf45d7b6ccf",
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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": "839d42687dfce0ed0ea2c6bd8d707cc0e276fbe7",
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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": "808e83e5add13152bd4a88346487de68395c136b",
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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": "6de9d08a9718ee9c12ba6343c50141c2d633e3dc",
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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": "4.1.40",
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"lessThan": "4.2",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.4.54",
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"lessThan": "4.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.9.15",
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"lessThan": "4.10",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "4.10.3",
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"lessThan": "4.11",
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"status": "affected",
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"versionType": "semver"
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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/namespace.c"
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],
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"versions": [
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{
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"version": "4.11",
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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": "4.11",
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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": "5.10.273",
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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": "5.15.224",
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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": "6.1.191",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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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": "6.12.113",
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"lessThanOrEqual": "6.12.*",
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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": "6.18.57",
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"lessThanOrEqual": "6.18.*",
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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": "7.2.11",
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"lessThanOrEqual": "7.2.*",
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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": "7.3",
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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": "4.11",
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"versionEndExcluding": "5.10.273"
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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": "4.11",
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"versionEndExcluding": "5.15.224"
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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": "4.11",
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"versionEndExcluding": "6.1.191"
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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": "4.11",
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"versionEndExcluding": "6.6.160"
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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": "4.11",
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"versionEndExcluding": "6.12.113"
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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": "4.11",
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"versionEndExcluding": "6.18.57"
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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": "4.11",
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"versionEndExcluding": "7.2.11"
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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": "4.11",
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"versionEndExcluding": "7.3"
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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": "4.1.40"
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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": "4.4.54"
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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": "4.9.15"
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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": "4.10.3"
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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/cda0c4e502a0f74a191471ce100fb061e5ab35d6"
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},
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{
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"url": "https://git.kernel.org/stable/c/3f55f71291e4332983cd63b288d1f2be3c9c08fc"
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},
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{
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"url": "https://git.kernel.org/stable/c/361f59e7f3f9a219fb5567bf9abc8482a154a399"
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},
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{
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"url": "https://git.kernel.org/stable/c/f6394281834492c6516a405a348b545ae698a331"
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},
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{
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"url": "https://git.kernel.org/stable/c/6e4012e571867868b545c91ca9d6095fdb709907"
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},
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{
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"url": "https://git.kernel.org/stable/c/d73f04e92c1aab78d96ac6cadb234c8a3a373d22"
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},
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{
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"url": "https://git.kernel.org/stable/c/18902a23ef36f83d32bafc58ae2484e6bb4bb8ef"
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},
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{
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"url": "https://git.kernel.org/stable/c/32bf92416614a1e3ff3524fc6b780259c7aad3ef"
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}
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],
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"title": "namespace: check a submount for references right before unmounting it",
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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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}
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} |