cve-2025-21639
Vulnerability from cvelistv5
Published
2025-01-19 10:17
Modified
2025-02-02 10:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rto_min/max: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, as this is the only member needed from the 'net' structure, but that would increase the size of this fix, to use '*data' everywhere 'net->sctp.rto_min/max' is used.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9fPatch
Impacted products
Vendor Product Version
Linux Linux Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
Version: 4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5
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   Linux Linux Version: 3.13
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{
   containers: {
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "net/sctp/sysctl.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9",
                     status: "affected",
                     version: "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
                     versionType: "git",
                  },
                  {
                     lessThan: "246428bfb9e7db15c5cd08e1d0eca41b65af2b06",
                     status: "affected",
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                     versionType: "git",
                  },
                  {
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                     status: "affected",
                     version: "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
                     versionType: "git",
                  },
                  {
                     lessThan: "4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482",
                     status: "affected",
                     version: "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
                     versionType: "git",
                  },
                  {
                     lessThan: "dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f",
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                     version: "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
                     versionType: "git",
                  },
                  {
                     lessThan: "c87f1f6ade56c711f8736901e330685b453e420e",
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                     versionType: "git",
                  },
                  {
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                     status: "affected",
                     version: "4f3fdf3bc59cafd14c3bc2c2369efad34c7aa8b5",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "net/sctp/sysctl.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "3.13",
                  },
                  {
                     lessThan: "3.13",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.4.*",
                     status: "unaffected",
                     version: "5.4.290",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.10.*",
                     status: "unaffected",
                     version: "5.10.234",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.15.*",
                     status: "unaffected",
                     version: "5.15.177",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.1.*",
                     status: "unaffected",
                     version: "6.1.125",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.6.*",
                     status: "unaffected",
                     version: "6.6.72",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.12.*",
                     status: "unaffected",
                     version: "6.12.10",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.13",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: rto_min/max: avoid using current->nsproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n  from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\n\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.rto_min/max' is used.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2025-02-02T10:15:57.867Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9",
            },
            {
               url: "https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06",
            },
            {
               url: "https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290",
            },
            {
               url: "https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482",
            },
            {
               url: "https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f",
            },
            {
               url: "https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e",
            },
            {
               url: "https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5",
            },
         ],
         title: "sctp: sysctl: rto_min/max: avoid using current->nsproxy",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2025-21639",
      datePublished: "2025-01-19T10:17:56.828Z",
      dateReserved: "2024-12-29T08:45:45.727Z",
      dateUpdated: "2025-02-02T10:15:57.867Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2025-21639\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-01-19T11:15:09.423\",\"lastModified\":\"2025-02-27T21:59:09.400\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsctp: sysctl: rto_min/max: avoid using current->nsproxy\\n\\nAs mentioned in a previous commit of this series, using the 'net'\\nstructure via 'current' is not recommended for different reasons:\\n\\n- Inconsistency: getting info from the reader's/writer's netns vs only\\n  from the opener's netns.\\n\\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\\n  syzbot [1] using acct(2).\\n\\nThe 'net' structure can be obtained from the table->data using\\ncontainer_of().\\n\\nNote that table->data could also be used directly, as this is the only\\nmember needed from the 'net' structure, but that would increase the size\\nof this fix, to use '*data' everywhere 'net->sctp.rto_min/max' is used.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: sysctl: rto_min/max: evitar usar current->nsproxy Como se mencionó en un commit anterior de esta serie, no se recomienda usar la estructura 'net' a través de 'current' por diferentes razones: - Inconsistencia: obtener información de los netns del lector/escritor vs solo de los netns del abridor. - current->nsproxy puede ser NULL en algunos casos, lo que resulta en un 'Oops' (null-ptr-deref), por ejemplo cuando la tarea actual está saliendo, como lo detectó syzbot [1] usando acct(2). La estructura 'net' se puede obtener de table->data usando Container_of(). Tenga en cuenta que table->data también se puede usar directamente, ya que este es el único miembro necesario de la estructura 'net', pero eso aumentaría el tamaño de esta corrección, para usar '*data' en todos los lugares donde se usa 'net->sctp.rto_min/max'.\"}],\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.13\",\"versionEndExcluding\":\"6.1.125\",\"matchCriteriaId\":\"1AE5CD38-F1CD-4FC5-91D7-8F77DE44AF25\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.72\",\"matchCriteriaId\":\"33E12097-C88A-45B4-9677-2A961A08DD3E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.10\",\"matchCriteriaId\":\"02D604F6-10D1-4F7B-A022-0888406A1121\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"62567B3C-6CEE-46D0-BC2E-B3717FBF7D13\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A073481-106D-4B15-B4C7-FB0213B8E1D4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"DE491969-75AE-4A6B-9A58-8FC5AF98798F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"93C0660D-7FB8-4FBA-892A-B064BA71E49E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"034C36A6-C481-41F3-AE9A-D116E5BE6895\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
   },
}


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