cve-2024-43840
Vulnerability from cvelistv5
Published
2024-08-17 09:21
Modified
2024-12-19 09:16
Severity ?
Summary
bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/19d3c179a37730caf600a97fed3794feac2b197bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d218fcc707d6b2c3616b6cd24b948fd4825cfecPatch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-43840",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:07:58.806748Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:33:04.569Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/net/bpf_jit_comp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6d218fcc707d6b2c3616b6cd24b948fd4825cfec",
              "status": "affected",
              "version": "efc9909fdce00a827a37609628223cd45bf95d0b",
              "versionType": "git"
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              "lessThan": "19d3c179a37730caf600a97fed3794feac2b197b",
              "status": "affected",
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/net/bpf_jit_comp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG\n\nWhen BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls\n__bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them\nthe struct bpf_tramp_image *im pointer as an argument in R0.\n\nThe trampoline generation code uses emit_addr_mov_i64() to emit\ninstructions for moving the bpf_tramp_image address into R0, but\nemit_addr_mov_i64() assumes the address to be in the vmalloc() space\nand uses only 48 bits. Because bpf_tramp_image is allocated using\nkzalloc(), its address can use more than 48-bits, in this case the\ntrampoline will pass an invalid address to __bpf_tramp_enter/exit()\ncausing a kernel crash.\n\nFix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64()\nas it can work with addresses that are greater than 48-bits."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:16:54.787Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6d218fcc707d6b2c3616b6cd24b948fd4825cfec"
        },
        {
          "url": "https://git.kernel.org/stable/c/19d3c179a37730caf600a97fed3794feac2b197b"
        }
      ],
      "title": "bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-43840",
    "datePublished": "2024-08-17T09:21:55.841Z",
    "dateReserved": "2024-08-17T09:11:59.274Z",
    "dateUpdated": "2024-12-19T09:16:54.787Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-43840\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-17T10:15:09.517\",\"lastModified\":\"2024-10-29T16:25:29.913\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG\\n\\nWhen BPF_TRAMP_F_CALL_ORIG is set, the trampoline calls\\n__bpf_tramp_enter() and __bpf_tramp_exit() functions, passing them\\nthe struct bpf_tramp_image *im pointer as an argument in R0.\\n\\nThe trampoline generation code uses emit_addr_mov_i64() to emit\\ninstructions for moving the bpf_tramp_image address into R0, but\\nemit_addr_mov_i64() assumes the address to be in the vmalloc() space\\nand uses only 48 bits. Because bpf_tramp_image is allocated using\\nkzalloc(), its address can use more than 48-bits, in this case the\\ntrampoline will pass an invalid address to __bpf_tramp_enter/exit()\\ncausing a kernel crash.\\n\\nFix this by using emit_a64_mov_i64() in place of emit_addr_mov_i64()\\nas it can work with addresses that are greater than 48-bits.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf, arm64: Reparar trampol\u00edn para BPF_TRAMP_F_CALL_ORIG Cuando BPF_TRAMP_F_CALL_ORIG est\u00e1 configurado, el trampol\u00edn llama a las funciones __bpf_tramp_enter() y __bpf_tramp_exit(), pas\u00e1ndoles el puntero struct bpf_tramp_image *im como argumento en R0 . El c\u00f3digo de generaci\u00f3n de trampol\u00edn usa emit_addr_mov_i64() para emitir instrucciones para mover la direcci\u00f3n bpf_tramp_image a R0, pero emit_addr_mov_i64() asume que la direcci\u00f3n est\u00e1 en el espacio vmalloc() y usa solo 48 bits. Debido a que bpf_tramp_image se asigna usando kzalloc(), su direcci\u00f3n puede usar m\u00e1s de 48 bits, en este caso el trampol\u00edn pasar\u00e1 una direcci\u00f3n no v\u00e1lida a __bpf_tramp_enter/exit() provocando un bloqueo del kernel. Solucione este problema utilizando emit_a64_mov_i64() en lugar de emit_addr_mov_i64(), ya que puede funcionar con direcciones superiores a 48 bits.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.0\",\"versionEndExcluding\":\"6.10.3\",\"matchCriteriaId\":\"10A3C375-FFAF-4092-9FFF-0DE81E7DCE63\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19d3c179a37730caf600a97fed3794feac2b197b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6d218fcc707d6b2c3616b6cd24b948fd4825cfec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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