CVE-2024-49571

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Especially the\nfield iparea_offset, once exceed the max value, there has the\nchance to access wrong address, and crash may happen.\n\nThis patch checks iparea_offset and ipv6_prefixes_cnt before using them."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 9.1, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The malformed CLC Proposal is received over a routable TCP connection by the in-kernel SMC listener (`smc_listen_work()`), with all attacker-controlled fields (`iparea_offset`, `ipv6_prefixes_cnt`, `hdr.length`, `typev1`) coming straight off the wire. Any remote host that can reach an SMC-enabled listening socket can deliver it.\nAC:L - The attacker fully controls every field involved; no race, memory grooming, or unpredictable state is needed, and the only variable \u2014 the server's IP prefix length for `smc_clc_prfx_match4_rcu()` \u2014 is brute-forceable in at most 32 connections. The OOB read in `smc_clc_msg_prop_valid()` triggers on the very first packet with no preconditions at all.\nPR:N - The CLC handshake is the first exchange after TCP accept and SMC performs no authentication whatsoever, so the vulnerable parsing runs entirely pre-authentication. The attacker needs only the ability to complete a TCP handshake with the SMC experimental option set.\nUI:N - The server-side listen worker parses the proposal automatically upon connection; no action by any local user or administrator is required. A single unsolicited connection suffices.\nS:U - The out-of-bounds reads and the NULL dereference occur within the kernel's own memory and security authority, with no crossing of a VM, IOMMU, or sandbox boundary. Impact is confined to the kernel that parsed the message.\nC:H - `iparea_offset` lets the prefix pointer land up to ~64 KB past a ~656-byte kmalloc-1k object, and the OOB-read `ipv6_prefixes_cnt` is checked for equality against the attacker's own `hdr->length`, making success remotely observable \u2014 a byte-granular read oracle over a large window of adjacent kernel heap (kernel pointers, other sockets' data). `smc_clc_prfx_match()` reads ~144 further OOB bytes and reflects the result back as a decline reason, so this is far more than a strictly bounded few-byte read.\nI:N - The out-of-bounds pointer is only ever dereferenced for reads (`smc_clc_msg_prop_valid()`, `smc_clc_prfx_match4_rcu()`/`match6_rcu()`), and the additional defect is a NULL-pointer read; no attacker-controlled data is written out of bounds and no control-flow hijack primitive arises.\nA:H - With `typev1=SMC_TYPE_D` and `iparea_offset != 40`, `smc_find_ism_v1_device_serv()` dereferences a NULL `pclc_smcd`, oopsing the `smc_hs_wq` worker while `smc_server_lgr_pending` and the socket lock are held and never released, permanently deadlocking all further SMC server handshakes; the far OOB read can also fault on unmapped memory, and `panic_on_oops` turns either into a full system panic."}]}], "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.c", "net/smc/smc_clc.h"], "versions": [{"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "846bada23bfcdeb83621b045ed85dc06c7833ff0", "status": "affected", "versionType": "git"}, {"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "f10635268a0a49ee902a3b63b5dbb76f4fed498e", "status": "affected", "versionType": "git"}, {"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "62056d1592e63d85e82357ee2ae6a6a294f440b0", "status": "affected", "versionType": "git"}, {"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "91a7c27c1444ed4677b83fd5308d2cf03f5f0851", "status": "affected", "versionType": "git"}, {"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "47ce46349672a7e0c361bfe39ed0b22e824ef4fb", "status": "affected", "versionType": "git"}, {"version": "e7b7a64a8493d47433fd003efbe6543e3f676294", "lessThan": "a29e220d3c8edbf0e1beb0f028878a4a85966556", "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.c", "net/smc/smc_clc.h"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.233", "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": "4.16", "versionEndExcluding": "5.10.233"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.122"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.68"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/846bada23bfcdeb83621b045ed85dc06c7833ff0"}, {"url": "https://git.kernel.org/stable/c/f10635268a0a49ee902a3b63b5dbb76f4fed498e"}, {"url": "https://git.kernel.org/stable/c/62056d1592e63d85e82357ee2ae6a6a294f440b0"}, {"url": "https://git.kernel.org/stable/c/91a7c27c1444ed4677b83fd5308d2cf03f5f0851"}, {"url": "https://git.kernel.org/stable/c/47ce46349672a7e0c361bfe39ed0b22e824ef4fb"}, {"url": "https://git.kernel.org/stable/c/a29e220d3c8edbf0e1beb0f028878a4a85966556"}], "title": "net/smc: check iparea_offset and ipv6_prefixes_cnt 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": "2025-11-03T20:41:09.035Z"}}]}}

{}

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Especially the\nfield iparea_offset, once exceed the max value, there has the\nchance to access wrong address, and crash may happen.\n\nThis patch checks iparea_offset and ipv6_prefixes_cnt before using them."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: comprobar iparea_offset e ipv6_prefixes_cnt al recibir un mensaje de propuesta Al recibir un mensaje de propuesta en el servidor, el campo iparea_offset y el campo ipv6_prefixes_cnt en el mensaje de propuesta son del cliente remoto y no se puede confiar plenamente en ellos. Especialmente el campo iparea_offset, una vez que se excede el valor m\u00e1ximo, existe la posibilidad de acceder a una direcci\u00f3n incorrecta y puede producirse un bloqueo. Este parche comprueba iparea_offset e ipv6_prefixes_cnt antes de usarlos."}], "id": "CVE-2024-49571", "lastModified": "2026-08-04T11:20:50.657", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "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": "2025-01-11T13:15:24.027", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47ce46349672a7e0c361bfe39ed0b22e824ef4fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/62056d1592e63d85e82357ee2ae6a6a294f440b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/846bada23bfcdeb83621b045ed85dc06c7833ff0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/91a7c27c1444ed4677b83fd5308d2cf03f5f0851"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a29e220d3c8edbf0e1beb0f028878a4a85966556"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f10635268a0a49ee902a3b63b5dbb76f4fed498e"}, {"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 iparea_offset and ipv6_prefixes_cnt when receiving proposal msg", "id": "2337099", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2337099"}, "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 iparea_offset and ipv6_prefixes_cnt when receiving proposal msg\nWhen receiving proposal msg in server, the field iparea_offset\nand the field ipv6_prefixes_cnt in proposal msg are from the\nremote client and can not be fully trusted. Especially the\nfield iparea_offset, once exceed the max value, there has the\nchance to access wrong address, and crash may happen.\nThis patch checks iparea_offset and ipv6_prefixes_cnt before using them."], "name": "CVE-2024-49571", "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-2024-49571\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-49571\nhttps://lore.kernel.org/linux-cve-announce/2025011142-CVE-2024-49571-c86d@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T11:14:51.907121+00:00", "updated": "2025-07-13T11:14:51.907174+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}