256 lines
13 KiB
JSON
256 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-2023-53006",
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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": "2025-03-27T16:40:15.745Z",
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"datePublished": "2025-03-27T16:43:37.225Z",
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"dateUpdated": "2026-10-15T21:41:25.078Z"
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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": "2026-08-05T09:12:20.807Z"
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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\ncifs: Fix oops due to uncleared server->smbd_conn in reconnect\n\nIn smbd_destroy(), clear the server->smbd_conn pointer after freeing the\nsmbd_connection struct that it points to so that reconnection doesn't get\nconfused."
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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 UAF is in the CIFS client's SMB Direct reconnect path (`cifs_abort_connection` → `smbd_destroy` → `smbd_reconnect`), driven by a remote peer dropping the RDMA/iWARP connection; iWARP/RoCEv2 are IP-reachable so a malicious or compromised SMB Direct server is a network attacker.\nAC:L - After any disconnect, `__cifs_reconnect` deterministically frees `smbd_conn` then immediately dereferences the dangling pointer in `smbd_reconnect`; the remote peer forces disconnects at will and can retry unboundedly every reconnect cycle.\nPR:N - The attacker is the remote SMB Direct server (or on-path peer) and needs no account or privileges on the victim; the vulnerable abort/reconnect runs in the cifsd kernel thread on the transport before SMB re-authentication.\nUI:N - Against an already-mounted `rdma` CIFS share (typical fstab/autofs enterprise setup), cifsd automatically reconnects on peer disconnect with no victim action at exploit time.\nS:U - The use-after-free corrupts host kernel heap (`smbd_connection` in kmalloc-4k) within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - This is a use-after-free of the heap-allocated `smbd_connection`; reclaim/grooming of the freed object lets the reconnect path read attacker-influenced fields (e.g. `transport_status`), yielding a kernel disclosure primitive per UAF guidance.\nI:H - If the reclaimed object presents `transport_status == SMBD_CONNECTED`, `smbd_destroy` runs RDMA teardown (disconnect, QP drain, frees) on attacker-controlled structure fields, giving a classic heap UAF write/control-flow hijack primitive.\nA:H - The dangling `server->smbd_conn` dereference is a confirmed KASAN use-after-free/oops in `smbd_reconnect` during reconnect and is repeatedly triggerable by peer disconnects."
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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/cifs/smbdirect.c"
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],
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"versions": [
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{
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"version": "8ef130f9ec27973f7b49e20c5a3b9134ca33026c",
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"lessThan": "a9640c0b268405f2540e8203a545e930ea88bb7d",
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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": "8ef130f9ec27973f7b49e20c5a3b9134ca33026c",
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"lessThan": "91be54849d5392050f5b847b42bd5e6221551ac8",
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"status": "affected",
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"versionType": "git"
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},
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"lessThan": "e037baee16e0b9ace7e730888fcae9cec11daff2",
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"status": "affected",
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"versionType": "git"
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{
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"lessThan": "4b83bc6f87eedab4599b0123e572a422689444be",
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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": "8ef130f9ec27973f7b49e20c5a3b9134ca33026c",
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"lessThan": "5109607a4ece7cd8536172bf7549eb4dce1f3576",
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"status": "affected",
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"versionType": "git"
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"lessThan": "b7ab9161cf5ddc42a288edf9d1a61f3bdffe17c7",
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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/cifs/smbdirect.c"
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],
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"versions": [
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{
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"version": "4.16",
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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": "4.16",
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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": "4.19.272",
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"lessThanOrEqual": "4.19.*",
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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": "5.4.231",
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"lessThanOrEqual": "5.4.*",
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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": "5.10.166",
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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": "5.15.91",
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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": "6.1.9",
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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",
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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": "4.16",
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"versionEndExcluding": "4.19.272"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/a9640c0b268405f2540e8203a545e930ea88bb7d"
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},
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{
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"url": "https://git.kernel.org/stable/c/91be54849d5392050f5b847b42bd5e6221551ac8"
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},
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{
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"url": "https://git.kernel.org/stable/c/e037baee16e0b9ace7e730888fcae9cec11daff2"
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{
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"url": "https://git.kernel.org/stable/c/4b83bc6f87eedab4599b0123e572a422689444be"
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},
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{
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"url": "https://git.kernel.org/stable/c/5109607a4ece7cd8536172bf7549eb4dce1f3576"
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},
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{
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"url": "https://git.kernel.org/stable/c/b7ab9161cf5ddc42a288edf9d1a61f3bdffe17c7"
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}
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],
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"title": "cifs: Fix oops due to uncleared server->smbd_conn in reconnect",
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"x_generator": {
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"engine": "bippy-1.2.0"
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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-2023-53006",
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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": "2026-10-15T21:33:05.727782Z"
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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": "2026-10-15T21:41:25.078Z"
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}
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}
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]
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}
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} |