CVE-2024-47408

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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 \u2014 far from \"strictly bounded to a few bytes\" \u2014 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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Una vez que el valor de smcd_v2_ext_offset excede el valor m\u00e1ximo, existe la posibilidad de acceder a una direcci\u00f3n incorrecta y puede ocurrir un bloqueo. Este parche verifica el valor de smcd_v2_ext_offset antes de usarlo."}], "id": "CVE-2024-47408", "lastModified": "2026-10-03T11:17:31.323", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-01-11T13:15:22.220", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/35da53027c1f2efdd7d0177dc00584134204761a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/48d5a8a304a643613dab376a278f29d3e22f7c34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/935caf324b445fe73d7708fae6f7176fb243f357"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ab332deb671d8f7e66d82a2ff2b3f715bc3a4ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a36364d8d4fabb105001f992fb8ff2d3546203d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e1cc8be2a785a8f1ce1f597f3e608602c5fccd46"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/smc: check smcd_v2_ext_offset when receiving proposal msg", "id": "2337134", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337134"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/smc: check smcd_v2_ext_offset when receiving proposal msg\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.\nThis patch checks the value of smcd_v2_ext_offset before using it."], "name": "CVE-2024-47408", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-01-11T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-47408\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-47408\nhttps://lore.kernel.org/linux-cve-announce/2025011141-CVE-2024-47408-e686@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T21:06:47.935153+00:00", "updated": "2025-07-13T21:06:47.935204+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}