CVE-2024-50262 (GCVE-0-2024-50262)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:17 – Updated: 2026-08-05 11:42
VLAI
Title
bpf: Fix out-of-bounds write in trie_get_next_key()
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix out-of-bounds write in trie_get_next_key() trie_get_next_key() allocates a node stack with size trie->max_prefixlen, while it writes (trie->max_prefixlen + 1) nodes to the stack when it has full paths from the root to leaves. For example, consider a trie with max_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ... 0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with .prefixlen = 8 make 9 nodes be written on the node stack with size 8.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-12-11 15:09 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < e8494ac079814a53fbc2258d2743e720907488ed (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < 91afbc0eb3c90258ae378ae3c6ead3d2371e926d (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < 590976f921723d53ac199c01d5b7b73a94875e68 (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < 86c8ebe02d8806dd8878d0063e8e185622ab6ea6 (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < a035df0b98df424559fd383e8e1a268f422ea2ba (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < 90a6e0e1e151ef7a9282e78f54c3091de2dcc99c (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980 (git)
Affected: b471f2f1de8b816f1e799b80aa92588f3566e4bd , < 13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21 (git)
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Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 4.19.323 , ≤ 4.19.* (semver)
Unaffected: 5.4.285 , ≤ 5.4.* (semver)
Unaffected: 5.10.229 , ≤ 5.10.* (semver)
Unaffected: 5.15.171 , ≤ 5.15.* (semver)
Unaffected: 6.1.116 , ≤ 6.1.* (semver)
Unaffected: 6.6.60 , ≤ 6.6.* (semver)
Unaffected: 6.11.7 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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Siemens RUGGEDCOM RST2428P Affected: 0 , < V3.2 (custom)
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Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Affected: 0 , < V3.2 (custom)
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Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Affected: 0 , < V3.2 (custom)
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Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.0 , < V3.1.5 (custom)
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                  "lessThan": "c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980",
                  "status": "affected",
                  "version": "b471f2f1de8b816f1e799b80aa92588f3566e4bd",
                  "versionType": "git"
                },
                {
                  "lessThan": "13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21",
                  "status": "affected",
                  "version": "b471f2f1de8b816f1e799b80aa92588f3566e4bd",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "kernel/bpf/lpm_trie.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.16"
                },
                {
                  "lessThan": "4.16",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.323",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.285",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.229",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.171",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.116",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.60",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.11.*",
                  "status": "unaffected",
                  "version": "6.11.7",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.12",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.323",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.285",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.229",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.171",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.116",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.60",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.11.7",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12",
                      "versionStartIncluding": "4.16",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix out-of-bounds write in trie_get_next_key()\n\ntrie_get_next_key() allocates a node stack with size trie-\u003emax_prefixlen,\nwhile it writes (trie-\u003emax_prefixlen + 1) nodes to the stack when it has\nfull paths from the root to leaves. For example, consider a trie with\nmax_prefixlen is 8, and the nodes with key 0x00/0, 0x00/1, 0x00/2, ...\n0x00/8 inserted. Subsequent calls to trie_get_next_key with _key with\n.prefixlen = 8 make 9 nodes be written on the node stack with size 8."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T20:48:43.014Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/e8494ac079814a53fbc2258d2743e720907488ed"
            },
            {
              "url": "https://git.kernel.org/stable/c/91afbc0eb3c90258ae378ae3c6ead3d2371e926d"
            },
            {
              "url": "https://git.kernel.org/stable/c/590976f921723d53ac199c01d5b7b73a94875e68"
            },
            {
              "url": "https://git.kernel.org/stable/c/86c8ebe02d8806dd8878d0063e8e185622ab6ea6"
            },
            {
              "url": "https://git.kernel.org/stable/c/a035df0b98df424559fd383e8e1a268f422ea2ba"
            },
            {
              "url": "https://git.kernel.org/stable/c/90a6e0e1e151ef7a9282e78f54c3091de2dcc99c"
            },
            {
              "url": "https://git.kernel.org/stable/c/c4b4f9a9ab82238cb158fa4fe61a8c0ae21a4980"
            },
            {
              "url": "https://git.kernel.org/stable/c/13400ac8fb80c57c2bfb12ebd35ee121ce9b4d21"
            }
          ],
          "title": "bpf: Fix out-of-bounds write in trie_get_next_key()",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-50262",
        "datePublished": "2024-11-09T10:17:50.461Z",
        "dateReserved": "2024-10-21T19:36:19.981Z",
        "dateUpdated": "2026-05-11T20:48:43.014Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.