Vulnerability-Lookup

FKIE_CVE-2024-49571

Vulnerability from fkie_nvd - Published: 2025-01-11 13:15 - Updated: 2026-08-04 11:20

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: net/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg When receiving proposal msg in server, the field iparea_offset and the field ipv6_prefixes_cnt in proposal msg are from the remote client and can not be fully trusted. Especially the field iparea_offset, once exceed the max value, there has the chance to access wrong address, and crash may happen. This patch checks iparea_offset and ipv6_prefixes_cnt before using them.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/47ce46349672a7e0c361bfe39ed0b22e824ef4fb	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/62056d1592e63d85e82357ee2ae6a6a294f440b0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/846bada23bfcdeb83621b045ed85dc06c7833ff0	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/91a7c27c1444ed4677b83fd5308d2cf03f5f0851	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a29e220d3c8edbf0e1beb0f028878a4a85966556	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f10635268a0a49ee902a3b63b5dbb76f4fed498e	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.13
linux	linux_kernel	6.13
linux	linux_kernel	6.13

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/smc/af_smc.c",
            "net/smc/smc_clc.c",
            "net/smc/smc_clc.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
            {
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            },
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              "status": "affected",
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            },
            {
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              "versionType": "git"
            }
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        },
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          "product": "Linux",
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            "net/smc/smc_clc.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "6.1.122",
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            {
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              "status": "unaffected",
              "version": "6.6.68",
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            },
            {
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              "status": "unaffected",
              "version": "6.12.7",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
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  "cveTags": [],
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg\n\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.\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"
        },
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        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
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          "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",
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        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-01-11T13:15:24.027",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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    }
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-49571 (GCVE-0-2024-49571)

Vulnerability from cvelistv5 – Published: 2025-01-11 12:35 – Updated: 2026-08-05 11:40

Title

net/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg

Summary

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/846bada23bfcdeb83…
https://git.kernel.org/stable/c/f10635268a0a49ee9…
https://git.kernel.org/stable/c/62056d1592e63d85e…
https://git.kernel.org/stable/c/91a7c27c1444ed467…
https://git.kernel.org/stable/c/47ce46349672a7e0c…
https://git.kernel.org/stable/c/a29e220d3c8edbf0e…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < 846bada23bfcdeb83621b045ed85dc06c7833ff0 (git) Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < f10635268a0a49ee902a3b63b5dbb76f4fed498e (git) Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < 62056d1592e63d85e82357ee2ae6a6a294f440b0 (git) Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < 91a7c27c1444ed4677b83fd5308d2cf03f5f0851 (git) Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < 47ce46349672a7e0c361bfe39ed0b22e824ef4fb (git) Affected: e7b7a64a8493d47433fd003efbe6543e3f676294 , < a29e220d3c8edbf0e1beb0f028878a4a85966556 (git)
Linux	Linux	Affected: 4.16 Unaffected: 0 , < 4.16 (semver) Unaffected: 5.10.233 , ≤ 5.10.* (semver) Unaffected: 5.15.176 , ≤ 5.15.* (semver) Unaffected: 6.1.122 , ≤ 6.1.* (semver) Unaffected: 6.6.68 , ≤ 6.6.* (semver) Unaffected: 6.12.7 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:41:09.035Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/smc/af_smc.c",
            "net/smc/smc_clc.c",
            "net/smc/smc_clc.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
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        },
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
              "version": "5.15.176",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.122",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.6.68",
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: check iparea_offset and ipv6_prefixes_cnt when receiving proposal msg\n\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.\n\nThis patch checks iparea_offset and ipv6_prefixes_cnt before using them."
        }
      ],
      "metrics": [
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            "version": "3.1"
          },
          "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\u0027s 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\u0027s 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\u0027s own `hdr-\u003elength`, making success remotely observable \u2014 a byte-granular read oracle over a large window of adjacent kernel heap (kernel pointers, other sockets\u0027 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:40:02.429Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-49571",
    "datePublished": "2025-01-11T12:35:36.957Z",
    "dateReserved": "2025-01-11T12:33:33.704Z",
    "dateUpdated": "2026-08-05T11:40:02.429Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.