267 lines
13 KiB
JSON
267 lines
13 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-2023-53358",
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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": "2025-09-17T14:54:09.732Z",
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"datePublished": "2025-09-17T14:56:48.812Z",
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"dateUpdated": "2026-08-05T09:13:38.694Z"
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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": "2026-08-05T09:13:38.694Z"
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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\nksmbd: fix racy issue under cocurrent smb2 tree disconnect\n\nThere is UAF issue under cocurrent smb2 tree disconnect.\nThis patch introduce TREE_CONN_EXPIRE flags for tcon to avoid cocurrent\naccess."
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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:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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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 - ksmbd is the in-kernel SMB server reached over TCP/445; smb2_tree_disconnect() is invoked from handle_ksmbd_work() solely on SMB2_TREE_DISCONNECT PDUs from a remote peer, with no local access required.\nAC:L - The attacker controls both sides of the race by issuing concurrent SMB2_TREE_DISCONNECT requests for the same TreeId (parallel ksmbd-io workqueue items via SMB credits) and can retry indefinitely until both paths observe the same tcon before TREE_CONN_EXPIRE exists.\nPR:L - smb2_check_user_session() and smb2_get_ksmbd_tcon() gate TREE_DISCONNECT behind an established session and tree connect, so a low-privileged SMB share user (including guest where mapped) is required; this is post-authentication, not a pre-auth path.\nUI:N - The attacker performs negotiate, session setup, tree connect, and concurrent tree disconnects entirely on its own connections; no victim or administrator action is needed.\nS:U - The use-after-free corrupts ksmbd kernel heap state within the same host kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Concurrent disconnect double-frees struct ksmbd_tree_connect (share_conf/user pointers), a sprayable slab UAF that yields arbitrary kernel read primitives once the object is reclaimed, consistent with ZDI-CAN-20592 RCE classification.\nI:H - The second disconnect path reads tree_conn fields from freed memory then kfree()s again, enabling heap spray to hijack control flow / arbitrary write; ZDI rates this as remote code execution in kernel context.\nA:H - Even without full exploitation, the double-free/UAF reliably oopses or panics ksmbd worker threads and can be triggered repeatedly over the network to deny service."
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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/ksmbd/mgmt/tree_connect.c",
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"fs/ksmbd/mgmt/tree_connect.h",
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"fs/ksmbd/smb2pdu.c"
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],
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"versions": [
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{
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "b36295c17fb97424406f0c3ab321b1ccaabb9be8",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "bd80d35725a0cf4df9307bfe2f1a3b2cb983d8e6",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "dc1c17716c099c90948ebb83e2170dd75a3be6b6",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "39366b47a59d46af15ac57beb0996268bf911f6a",
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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": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "30210947a343b6b3ca13adc9bfc88e1543e16dd5",
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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/ksmbd/mgmt/tree_connect.c",
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"fs/ksmbd/mgmt/tree_connect.h",
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"fs/ksmbd/smb2pdu.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": "5.15.145",
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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": "6.1.28",
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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": "6.2.15",
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"lessThanOrEqual": "6.2.*",
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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": "6.3.2",
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"lessThanOrEqual": "6.3.*",
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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": "6.4",
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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": "5.15.145"
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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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"versionEndExcluding": "6.1.28"
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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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"versionEndExcluding": "6.2.15"
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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": "5.15",
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"versionEndExcluding": "6.3.2"
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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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"versionEndExcluding": "6.4"
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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/b36295c17fb97424406f0c3ab321b1ccaabb9be8"
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},
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{
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"url": "https://git.kernel.org/stable/c/bd80d35725a0cf4df9307bfe2f1a3b2cb983d8e6"
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},
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{
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"url": "https://git.kernel.org/stable/c/dc1c17716c099c90948ebb83e2170dd75a3be6b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/39366b47a59d46af15ac57beb0996268bf911f6a"
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},
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{
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"url": "https://git.kernel.org/stable/c/30210947a343b6b3ca13adc9bfc88e1543e16dd5"
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}
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],
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"title": "ksmbd: fix racy issue under cocurrent smb2 tree disconnect",
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "HIGH",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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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-2023-53358",
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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": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-01-14T18:43:24.919171Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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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": "2026-01-14T18:52:59.942Z"
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}
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}
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]
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}
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} |