277 lines
14 KiB
JSON
277 lines
14 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-2026-89653",
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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": "2026-09-11T19:38:34.742Z",
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"datePublished": "2026-09-11T19:45:43.261Z",
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"dateUpdated": "2026-10-19T08:50:24.862Z"
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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": "2026-10-19T08:50:24.862Z"
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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\nceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode\n\nMDSMap export_targets entries are monitor controlled. check_new_map()\nuses each entry as a bit number in a fixed stack bitmap, so a rank\noutside the protocol namespace can make set_bit() write past the end of\nthe array.\n\nReject ranks outside CEPH_MAX_MDS while decoding the map. Do not\nvalidate against possible_max_rank here because maps may legitimately\nreference ranks beyond a temporarily reduced max_mds."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - A crafted MDSMap arrives in CEPH_MSG_MDS_MAP over the Ceph messenger TCP session from a monitor or MDS; extra_mon_dispatch() and mds_dispatch() deliver it to ceph_mdsc_handle_mdsmap() on already-mounted CephFS/Rook/Kubernetes clients without a local syscall.\nAC:L - The monitor fully controls each export_targets[] u32; after the first map is stored, a later epoch reaches check_new_map() and set_bit() with an attacker-chosen bit number, overflowing the stack bitmap with no race or special layout.\nPR:N - The attacker is the remote Ceph monitor or MDS peer and needs no Linux UID, capability, or init-namespace root on the victim, matching other Ceph client decode CVEs such as CVE-2026-68159.\nUI:N - Once CephFS is mounted, MDS maps are subscribed and applied automatically in the ceph-msgr worker; a malicious peer can push a new epoch without any further interactive victim action.\nS:U - The stack out-of-bounds write corrupts kernel memory on the Ceph client host only and does not cross a VM, IOMMU, or sandbox security authority.\nC:H - set_bit() with an attacker-chosen rank writes past the fixed stack bitmap in check_new_map(), corrupting adjacent kernel stack contents; this memory-corruption primitive can be leveraged for information disclosure.\nI:H - The overflow is a stack out-of-bounds write of attacker-selected bits at a u32-controlled offset from the targets[] array, enabling control-flow hijack and arbitrary kernel writes.\nA:H - An out-of-range bit index makes set_bit() write off the stack object, causing a KASAN stack-out-of-bounds report or kernel oops/panic that a malicious monitor can repeat with each new map epoch."
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}
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]
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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/ceph/mdsmap.c"
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],
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"versions": [
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{
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"version": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "8c823bbab3c24e657469a84db96902ba82d4e8bb",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "c4addccd05bacbef2144b4db14853d0308a218ac",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "736adee11af36e407ed902264f8b2fb5cf94b62f",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "4d298880f82c42383b36946bafde7ccf4d804c9b",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "96c3f5fbb0d5386e7111426f047f98cec4586674",
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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": "d517b3983dd3106ca92d6c5d0d09415a4a09481c",
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"lessThan": "aedc9053d909508a5f56c3f49f885fc030df4730",
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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/ceph/mdsmap.c"
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],
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"versions": [
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{
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"version": "5.15",
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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": "5.15",
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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": "5.15.221",
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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": "6.1.188",
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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": "6.6.157",
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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": "6.12.109",
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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": "6.18.50",
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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": "7.2.4",
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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": "5.15",
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"versionEndExcluding": "5.15.221"
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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": "5.15",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/3740c88ca9cb2210a8dbdd55ea4cec119fbe86fe"
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},
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{
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"url": "https://git.kernel.org/stable/c/8c823bbab3c24e657469a84db96902ba82d4e8bb"
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},
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{
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"url": "https://git.kernel.org/stable/c/c4addccd05bacbef2144b4db14853d0308a218ac"
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},
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{
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"url": "https://git.kernel.org/stable/c/736adee11af36e407ed902264f8b2fb5cf94b62f"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d298880f82c42383b36946bafde7ccf4d804c9b"
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},
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{
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"url": "https://git.kernel.org/stable/c/96c3f5fbb0d5386e7111426f047f98cec4586674"
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},
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{
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"url": "https://git.kernel.org/stable/c/aedc9053d909508a5f56c3f49f885fc030df4730"
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}
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],
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"title": "ceph: reject export_targets ranks >= CEPH_MAX_MDS in mdsmap decode",
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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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"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-2026-89653",
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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": "yes"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:25:22.176850Z"
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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": "2026-10-16T19:26:46.987Z"
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}
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}
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]
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}
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} |