cve-2024-50043
Vulnerability from cvelistv5
Published
2024-10-21 19:39
Modified
2024-12-19 09:31
Severity ?
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 Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5
Version: 3f29cc82a84c23cfd12b903029dd26002ca825f5
 Create a notification for this product.
   Linux Linux Version: 6.9
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            metrics: [
               {
                  other: {
                     content: {
                        id: "CVE-2024-50043",
                        options: [
                           {
                              Exploitation: "none",
                           },
                           {
                              Automatable: "no",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-10-22T13:24:30.411615Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            providerMetadata: {
               dateUpdated: "2024-10-22T13:28:43.975Z",
               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
            },
            title: "CISA ADP Vulnrichment",
         },
      ],
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "fs/nfsd/nfs4state.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "7ca9e472ce5c67daa3188a348ece8c02a0765039",
                     status: "affected",
                     version: "3f29cc82a84c23cfd12b903029dd26002ca825f5",
                     versionType: "git",
                  },
                  {
                     lessThan: "c88c150a467fcb670a1608e2272beeee3e86df6e",
                     status: "affected",
                     version: "3f29cc82a84c23cfd12b903029dd26002ca825f5",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "fs/nfsd/nfs4state.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "6.9",
                  },
                  {
                     lessThan: "6.9",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.11.*",
                     status: "unaffected",
                     version: "6.11.4",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.12",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         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.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T09:31:58.757Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039",
            },
            {
               url: "https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e",
            },
         ],
         title: "nfsd: fix possible badness in FREE_STATEID",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-50043",
      datePublished: "2024-10-21T19:39:41.758Z",
      dateReserved: "2024-10-21T12:17:06.071Z",
      dateUpdated: "2024-12-19T09:31:58.757Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-50043\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T20:15:17.263\",\"lastModified\":\"2024-10-24T19:32:21.480\",\"vulnStatus\":\"Analyzed\",\"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.\"}],\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.9\",\"versionEndExcluding\":\"6.11.4\",\"matchCriteriaId\":\"2E4E4417-01B4-411F-8007-4D28ACC3C8F7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F361E1D-580F-4A2D-A509-7615F73167A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"925478D0-3E3D-4E6F-ACD5-09F28D5DF82C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50043\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T13:24:30.411615Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:24:33.788Z\"}}], \"cna\": {\"title\": \"nfsd: fix possible badness in FREE_STATEID\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3f29cc82a84c\", \"lessThan\": \"7ca9e472ce5c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3f29cc82a84c\", \"lessThan\": \"c88c150a467f\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfsd/nfs4state.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.11.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12-rc3\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfsd/nfs4state.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039\"}, {\"url\": \"https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"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.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:54:03.139Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-50043\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:54:03.139Z\", \"dateReserved\": \"2024-10-21T12:17:06.071Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T19:39:41.758Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.