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vuln-cve/data/2024/47xxx/CVE-2024-47408.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2024-47408",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-01-11T12:34:02.588Z",
"datePublished": "2025-01-11T12:35:35.284Z",
"dateUpdated": "2026-10-03T10:55:17.426Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-10-03T10:55:17.426Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: check smcd_v2_ext_offset when receiving proposal msg\n\nWhen receiving proposal msg in server, the field smcd_v2_ext_offset in\nproposal msg is from the remote client and can not be fully trusted.\nOnce the value of smcd_v2_ext_offset exceed the max value, there has\nthe chance to access wrong address, and crash may happen.\n\nThis patch checks the value of smcd_v2_ext_offset before using it."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 9.8,
"baseSeverity": "CRITICAL"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The malformed CLC Proposal is delivered as ordinary TCP payload to an SMC-enabled listening socket and parsed by `smc_listen_work()`/`smc_clc_wait_msg()`; every field involved (`smcd_v2_ext_offset`, `hdr.length`, `typev1/typev2`, `ism_gid_cnt`) comes straight off the wire. Any host that can route to the listener can trigger it.\nAC:L - A single proposal with a chosen 16-bit `smcd_v2_ext_offset` deterministically moves the pointer up to ~64 KB past the 656-byte buffer, with no race, no timing window, and no state outside the attacker's control; the attacker can sweep all 65535 offsets across successive connections. The ISM-device precondition is the target's normal SMC-D configuration, not an attacker-uncontrollable condition.\nPR:N - The CLC handshake runs immediately after the TCP three-way handshake and entirely before any application-level authentication or authorization. An unauthenticated remote attacker only needs to open a TCP connection to the SMC listener.\nUI:N - The proposal is processed automatically by the kernel listen worker as part of the SMC handshake. No action by any local user or administrator is needed.\nS:U - The out-of-bounds access and its consequences are confined to the kernel's own memory and the SMC subsystem on the target host. No VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The read reaches an attacker-chosen offset up to ~64 KB beyond the slab object — far from \"strictly bounded to a few bytes\" — and the OOB bytes are compared against local ISM CHIDs/GIDs and the system EID, giving a remote, repeatable oracle over kernel heap contents at chosen offsets. Groomed heap data reaching `smcd_lgr_match()` can also attach the attacker to another peer's link group and its shared DMB.\nI:H - The out-of-bounds bytes are stored into `ini->ism_peer_gid[]` and directly drive link-group reuse in `smc_conn_create()` via `smcd_lgr_match()`, so heap-groomable values let an attacker bind their connection into a different peer's existing SMC-D link group and shared memory buffer, corrupting that peer's connection state. The wild pointer is also fully attacker-steered across a 64 KB window.\nA:H - The wild dereference occurs in the `smc_hs_wq` worker while holding both `smc_server_lgr_pending` and `smcd_dev_list.mutex`; an unmapped or KASAN-poisoned target oopses the worker with both global mutexes permanently held, hanging all further SMC handshakes and ISM device registration, and panicking the box outright under `panic_on_oops`."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/smc/af_smc.c",
"net/smc/smc_clc.h"
],
"versions": [
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "35da53027c1f2efdd7d0177dc00584134204761a",
"status": "affected",
"versionType": "git"
},
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "a36364d8d4fabb105001f992fb8ff2d3546203d6",
"status": "affected",
"versionType": "git"
},
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "e1cc8be2a785a8f1ce1f597f3e608602c5fccd46",
"status": "affected",
"versionType": "git"
},
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "935caf324b445fe73d7708fae6f7176fb243f357",
"status": "affected",
"versionType": "git"
},
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "48d5a8a304a643613dab376a278f29d3e22f7c34",
"status": "affected",
"versionType": "git"
},
{
"version": "5c21c4ccafe85906db809de3af391fd434df8a27",
"lessThan": "9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/smc/af_smc.c",
"net/smc/smc_clc.h"
],
"versions": [
{
"version": "5.10",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.10",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.271",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.176",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.122",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.68",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.7",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.13",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "5.10.271"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "5.15.176"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "6.1.122"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "6.6.68"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "6.12.7"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.10",
"versionEndExcluding": "6.13"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/35da53027c1f2efdd7d0177dc00584134204761a"
},
{
"url": "https://git.kernel.org/stable/c/a36364d8d4fabb105001f992fb8ff2d3546203d6"
},
{
"url": "https://git.kernel.org/stable/c/e1cc8be2a785a8f1ce1f597f3e608602c5fccd46"
},
{
"url": "https://git.kernel.org/stable/c/935caf324b445fe73d7708fae6f7176fb243f357"
},
{
"url": "https://git.kernel.org/stable/c/48d5a8a304a643613dab376a278f29d3e22f7c34"
},
{
"url": "https://git.kernel.org/stable/c/9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad"
}
],
"title": "net/smc: check smcd_v2_ext_offset when receiving proposal msg",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T20:39:33.276Z"
}
}
]
}
}
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