196 lines
11 KiB
JSON
196 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-2025-38325",
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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": "2025-04-16T04:51:24.004Z",
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"datePublished": "2025-07-10T08:14:59.544Z",
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"dateUpdated": "2026-08-05T12:01:09.621Z"
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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": "2026-08-05T12:01:09.621Z"
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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: add free_transport ops in ksmbd connection\n\nfree_transport function for tcp connection can be called from smbdirect.\nIt will cause kernel oops. This patch add free_transport ops in ksmbd\nconnection, and add each free_transports for tcp and smbdirect."
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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 - The vulnerable teardown path belongs to ksmbd's in-kernel SMB Direct transport, whose RDMA CM listener accepts connections from remote peers on port 445 (InfiniBand) / 5445 (iWARP), and is reachable over routable IP via iWARP/RoCEv2 or software providers (siw/rxe). No local access is needed — a remote peer triggers it by establishing and dropping an SMB Direct connection.\nAC:L - The type confusion is deterministic — every SMB Direct connection teardown funnels through ksmbd_conn_free() → ksmbd_free_transport() and fabricates a socket pointer from the status/full_packet_received bytes, with no race or memory-layout precondition. The premature-free variant simply requires holding an oplock/lease at disconnect time, which the attacker fully controls.\nPR:N - Connection setup and teardown happen entirely before SMB2 SESSION_SETUP: the error path in smb_direct_handle_connect_request() and the normal ksmbd_conn_handler_loop() exit both call free_transport() with no credentials verified. An unauthenticated peer that connects and disconnects triggers the confused free.\nUI:N - The attacker drives the entire sequence by opening and closing an SMB Direct connection; no action by any local user or administrator is required beyond ksmbd already serving SMB Direct.\nS:U - The corruption is confined to kernel memory managed by the ksmbd server within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The type confusion plus the unconditional kfree(t) in the RDMA free_transport() leave conn->transport dangling and double-free the slab object, giving a use-after-free on a large kmalloc allocation that an attacker can reclaim and read back through ksmbd_conn_write()/rdma_read paths, which is leverageable for arbitrary kernel memory disclosure.\nI:H - This is a genuine type confusion combined with a double free and a use-after-free whose reuse ends in an indirect call through freed memory (conn->transport->ops->writev in __smb2_lease_break_noti()), a direct control-flow hijack primitive once the freed object is groomed.\nA:H - Every SMB Direct teardown calls sock_release() on a fabricated pointer built from the status enum, producing a guaranteed kernel oops that kills the ksmbd kthread and leaks its RDMA resources, and panics outright on panic_on_oops configurations common in appliances and embedded deployments."
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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/smb/server/connection.c",
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"fs/smb/server/connection.h",
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"fs/smb/server/transport_rdma.c",
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"fs/smb/server/transport_tcp.c"
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],
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"versions": [
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{
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"version": "1da8bd9a10ecd718692732294d15fd801c0eabb5",
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"lessThan": "52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6",
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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": "1aec4d14cf81b7b3e7b69eb1cfa94144eed7138e",
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"lessThan": "3890da762a66191c440b0bd6e3ee45501edbb0c1",
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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": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de",
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"lessThan": "3f3aae77280aad9f5acc6709c596148966f765c7",
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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": "21a4e47578d44c6b37c4fc4aba8ed7cc8dbb13de",
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"lessThan": "a89f5fae998bdc4d0505306f93844c9ae059d50c",
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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": "e59796fc80603bcd8569d4d2e10b213c1918edb4",
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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": "6.12.26",
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"lessThan": "6.12.35",
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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": "6.14.4",
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"lessThan": "6.15",
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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/smb/server/connection.c",
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"fs/smb/server/connection.h",
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"fs/smb/server/transport_rdma.c",
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"fs/smb/server/transport_tcp.c"
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],
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"versions": [
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{
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"version": "6.15",
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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": "6.15",
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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": "6.12.35",
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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": "6.15.4",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.12.26",
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"versionEndExcluding": "6.12.35"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/52f5a52dc17a4a7b4363ac03fe2c4ef26f020dc6"
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},
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{
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"url": "https://git.kernel.org/stable/c/3890da762a66191c440b0bd6e3ee45501edbb0c1"
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},
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{
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"url": "https://git.kernel.org/stable/c/3f3aae77280aad9f5acc6709c596148966f765c7"
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},
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{
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"url": "https://git.kernel.org/stable/c/a89f5fae998bdc4d0505306f93844c9ae059d50c"
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}
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],
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"title": "ksmbd: add free_transport ops in ksmbd connection",
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} |