fkie_cve-2024-40996
Vulnerability from fkie_nvd
Published
2024-07-12 13:15
Modified
2024-11-21 09:32
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid splat in pskb_pull_reason syzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug hint in pskb_may_pull. We'd like to retain this debug check because it might hint at integer overflows and other issues (kernel code should pull headers, not huge value). In bpf case, this splat isn't interesting at all: such (nonsensical) bpf programs are typically generated by a fuzzer anyway. Do what Eric suggested and suppress such warning. For CONFIG_DEBUG_NET=n we don't need the extra check because pskb_may_pull will do the right thing: return an error without the WARN() backtrace.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10
linux linux_kernel 6.10


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "57BC82B2-9518-4E49-8B35-1E0659D07153",
                     versionEndExcluding: "6.1.96",
                     versionStartIncluding: "6.1.86",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "11D787AB-6330-424C-8EDA-145219D31344",
                     versionEndExcluding: "6.6.36",
                     versionStartIncluding: "6.6.27",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "1833E4E3-20C1-46FE-BE78-1FA23B2452C0",
                     versionEndExcluding: "6.9.7",
                     versionStartIncluding: "6.9",
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                     criteria: "cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*",
                     matchCriteriaId: "2EBB4392-5FA6-4DA9-9772-8F9C750109FA",
                     vulnerable: true,
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                     matchCriteriaId: "331C2F14-12C7-45D5-893D-8C52EE38EA10",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*",
                     matchCriteriaId: "3173713D-909A-4DD3-9DD4-1E171EB057EE",
                     vulnerable: true,
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                     criteria: "cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*",
                     matchCriteriaId: "79F18AFA-40F7-43F0-BA30-7BDB65F918B9",
                     vulnerable: true,
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               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: Avoid splat in pskb_pull_reason\n\nsyzkaller builds (CONFIG_DEBUG_NET=y) frequently trigger a debug\nhint in pskb_may_pull.\n\nWe'd like to retain this debug check because it might hint at integer\noverflows and other issues (kernel code should pull headers, not huge\nvalue).\n\nIn bpf case, this splat isn't interesting at all: such (nonsensical)\nbpf programs are typically generated by a fuzzer anyway.\n\nDo what Eric suggested and suppress such warning.\n\nFor CONFIG_DEBUG_NET=n we don't need the extra check because\npskb_may_pull will do the right thing: return an error without the\nWARN() backtrace.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: evitar splat en pskb_pull_reason compilaciones de syzkaller (CONFIG_DEBUG_NET=y) frecuentemente activa una sugerencia de depuración en pskb_may_pull. Nos gustaría conservar esta verificación de depuración porque podría indicar desbordamientos de enteros y otros problemas (el código del kernel debe extraer encabezados, no valores enormes). En el caso de bpf, este símbolo no es nada interesante: estos programas bpf (sin sentido) normalmente son generados por un fuzzer de todos modos. Haga lo que Eric sugirió y suprima esa advertencia. Para CONFIG_DEBUG_NET=n no necesitamos la verificación adicional porque pskb_may_pull hará lo correcto: devolver un error sin el rastreo WARN().",
      },
   ],
   id: "CVE-2024-40996",
   lastModified: "2024-11-21T09:32:01.787",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 7.8,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.8,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-07-12T13:15:20.740",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
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         url: "https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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         url: "https://git.kernel.org/stable/c/2bbe3e5a2f4ef69d13be54f1cf895b4658287080",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
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         url: "https://git.kernel.org/stable/c/5e90258303a358e88737afb5048bee9113beea3a",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/7f9644782c559635bd676c12c59389a34ed7c866",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/dacc15e9cb248d19e5fc63c54bef0b9b55007761",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "NVD-CWE-noinfo",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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