fkie_cve-2025-38607
Vulnerability from fkie_nvd
Published
2025-08-19 17:15
Modified
2025-11-26 17:40
Severity ?
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: bpf: handle jset (if a & b ...) as a jump in CFG computation BPF_JSET is a conditional jump and currently verifier.c:can_jump() does not know about that. This can lead to incorrect live registers and SCC computation. E.g. in the following example: 1: r0 = 1; 2: r2 = 2; 3: if r1 & 0x7 goto +1; 4: exit; 5: r0 = r2; 6: exit; W/o this fix insn_successors(3) will return only (4), a jump to (5) would be missed and r2 won't be marked as alive at (3).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/261b30ad1516f4b9edd500aa6e8d6315c8fc109aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3157f7e2999616ac91f4d559a8566214f74000a5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/65eb166b8636365ad3d6e36d50a7c5edfe6cc66ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2EA7D98E-F04C-44BE-AC61-F5ADC4C88EC6",
              "versionEndExcluding": "6.15.10",
              "versionStartIncluding": "6.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "58182352-D7DF-4CC9-841E-03C1D852C3FB",
              "versionEndExcluding": "6.16.1",
              "versionStartIncluding": "6.16",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: handle jset (if a \u0026 b ...) as a jump in CFG computation\n\nBPF_JSET is a conditional jump and currently verifier.c:can_jump()\ndoes not know about that. This can lead to incorrect live registers\nand SCC computation.\n\nE.g. in the following example:\n\n   1: r0 = 1;\n   2: r2 = 2;\n   3: if r1 \u0026 0x7 goto +1;\n   4: exit;\n   5: r0 = r2;\n   6: exit;\n\nW/o this fix insn_successors(3) will return only (4), a jump to (5)\nwould be missed and r2 won\u0027t be marked as alive at (3)."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: manejar jset (si a \u0026amp; b ...) como un salto en el c\u00e1lculo CFG. BPF_JSET es un salto condicional y actualmente verifier.c:can_jump() no lo detecta. Esto puede provocar registros activos y c\u00e1lculos SCC incorrectos. Por ejemplo, en el siguiente ejemplo: 1: r0 = 1; 2: r2 = 2; 3: si r1 \u0026amp; 0x7 goto +1; 4: salir; 5: r0 = r2; 6: salir; Sin esta correcci\u00f3n, insn_successors(3) solo devolver\u00e1 (4), se omitir\u00eda un salto a (5) y r2 no se marcar\u00eda como activo en (3)."
    }
  ],
  "id": "CVE-2025-38607",
  "lastModified": "2025-11-26T17:40:41.620",
  "metrics": {
    "cvssMetricV31": [
      {
        "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": "2025-08-19T17:15:39.070",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/261b30ad1516f4b9edd500aa6e8d6315c8fc109a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/3157f7e2999616ac91f4d559a8566214f74000a5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/65eb166b8636365ad3d6e36d50a7c5edfe6cc66e"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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