fkie_cve-2024-50043
Vulnerability from fkie_nvd
Published
2024-10-21 20:15
Modified
2024-10-24 19:32
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: nfsd: fix possible badness in FREE_STATEID When multiple FREE_STATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors. In nfsd4_free_stateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4_put_stid(), that allows another FREE_STATE to find the stateid again. The first one will proceed to then free the stateid which leads to either use-after-free or decrementing already zeroed counter.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.12
linux linux_kernel 6.12


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "2E4E4417-01B4-411F-8007-4D28ACC3C8F7",
                     versionEndExcluding: "6.11.4",
                     versionStartIncluding: "6.9",
                     vulnerable: true,
                  },
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                     criteria: "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*",
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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\nnfsd: fix possible badness in FREE_STATEID\n\nWhen multiple FREE_STATEIDs are sent for the same delegation stateid,\nit can lead to a possible either use-after-free or counter refcount\nunderflow errors.\n\nIn nfsd4_free_stateid() under the client lock we find a delegation\nstateid, however the code drops the lock before calling nfs4_put_stid(),\nthat allows another FREE_STATE to find the stateid again. The first one\nwill proceed to then free the stateid which leads to either\nuse-after-free or decrementing already zeroed counter.",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nfsd: corregir posible maldad en FREE_STATEID Cuando se envían múltiples FREE_STATEID para el mismo stateid de delegación, puede conducir a un posible error de subdesbordamiento de contador o de use after free. En nfsd4_free_stateid() bajo el bloqueo del cliente encontramos un stateid de delegación, sin embargo, el código elimina el bloqueo antes de llamar a nfs4_put_stid(), que permite que otro FREE_STATE encuentre el stateid nuevamente. El primero procederá a liberar el stateid, lo que conduce a un use after free o a la disminución del contador ya puesto a cero.",
      },
   ],
   id: "CVE-2024-50043",
   lastModified: "2024-10-24T19:32:21.480",
   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: "2024-10-21T20:15:17.263",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039",
      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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