CVE-2025-21635 (GCVE-0-2025-21635)

Vulnerability from cvelistv5 – Published: 2025-01-19 10:17 – Updated: 2026-10-30 12:20
VLAI
Title
rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current->nsproxy
Summary
In the Linux kernel, the following vulnerability has been resolved: rds: sysctl: rds_tcp_{rcv,snd}buf: 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 per-netns structure can be obtained from the table->data using container_of(), then the 'net' one can be retrieved from the listen socket (if available).
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:54 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c6a58ffed53612be86b758df1cdb0b0f4305e9cb , < 6f353c2230c199f343406c08482940ec5d8ba89c (git)
Affected: c6a58ffed53612be86b758df1cdb0b0f4305e9cb , < 33b3e09a489a31b30342b77cc55290f025d95c7e (git)
Affected: c6a58ffed53612be86b758df1cdb0b0f4305e9cb , < de8d6de0ee27be4b2b1e5b06f04aeacbabbba492 (git)
Affected: c6a58ffed53612be86b758df1cdb0b0f4305e9cb , < 7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.10 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-21635",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:54:16.928023Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:57:18.232Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/rds/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6f353c2230c199f343406c08482940ec5d8ba89c",
              "status": "affected",
              "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
              "versionType": "git"
            },
            {
              "lessThan": "33b3e09a489a31b30342b77cc55290f025d95c7e",
              "status": "affected",
              "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
              "versionType": "git"
            },
            {
              "lessThan": "de8d6de0ee27be4b2b1e5b06f04aeacbabbba492",
              "status": "affected",
              "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
              "versionType": "git"
            },
            {
              "lessThan": "7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c",
              "status": "affected",
              "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/rds/tcp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.191",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.160",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.10",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy\n\nAs mentioned in a previous commit of this series, using the \u0027net\u0027\nstructure via \u0027current\u0027 is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader\u0027s/writer\u0027s netns vs only\n  from the opener\u0027s netns.\n\n- current-\u003ensproxy can be NULL in some cases, resulting in an \u0027Oops\u0027\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe per-netns structure can be obtained from the table-\u003edata using\ncontainer_of(), then the \u0027net\u0027 one can be retrieved from the listen\nsocket (if available)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:20:39.557Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6f353c2230c199f343406c08482940ec5d8ba89c"
        },
        {
          "url": "https://git.kernel.org/stable/c/33b3e09a489a31b30342b77cc55290f025d95c7e"
        },
        {
          "url": "https://git.kernel.org/stable/c/de8d6de0ee27be4b2b1e5b06f04aeacbabbba492"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c"
        }
      ],
      "title": "rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21635",
    "datePublished": "2025-01-19T10:17:53.832Z",
    "dateReserved": "2024-12-29T08:45:45.726Z",
    "dateUpdated": "2026-10-30T12:20:39.557Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-21635",
      "date": "2026-11-01",
      "epss": "0.00254",
      "percentile": "0.16938"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-24T02:24:10.000Z",
      "cve": "CVE-2025-21635",
      "id": "msrc_CVE-2025-21635",
      "initial_release_date": "2025-09-04T06:59:21.000Z",
      "product_status:under_investigation": "25",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-21635.json",
      "version": "20"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/rds/tcp.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "6f353c2230c199f343406c08482940ec5d8ba89c",
                    "status": "affected",
                    "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "33b3e09a489a31b30342b77cc55290f025d95c7e",
                    "status": "affected",
                    "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "de8d6de0ee27be4b2b1e5b06f04aeacbabbba492",
                    "status": "affected",
                    "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c",
                    "status": "affected",
                    "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/rds/tcp.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.6"
                  },
                  {
                    "lessThan": "4.6",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.191",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.160",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.10",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.13",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F638079A-35B0-4580-9A7C-10535B19386D",
                    "versionEndExcluding": "6.12.10",
                    "versionStartIncluding": "4.6",
                    "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",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy\n\nAs mentioned in a previous commit of this series, using the \u0027net\u0027\nstructure via \u0027current\u0027 is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader\u0027s/writer\u0027s netns vs only\n  from the opener\u0027s netns.\n\n- current-\u003ensproxy can be NULL in some cases, resulting in an \u0027Oops\u0027\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe per-netns structure can be obtained from the table-\u003edata using\ncontainer_of(), then the \u0027net\u0027 one can be retrieved from the listen\nsocket (if available)."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rds: sysctl: rds_tcp_{rcv,snd}buf: evitar usar current-\u0026gt;nsproxy Como se mencion\u00f3 en un commit anterior de esta serie, no se recomienda usar la estructura \u0027net\u0027 a trav\u00e9s de \u0027current\u0027 por diferentes razones: - Inconsistencia: obtener informaci\u00f3n de los netns del lector/escritor vs solo de los netns del abridor. - current-\u0026gt;nsproxy puede ser NULL en algunos casos, lo que resulta en un \u0027Oops\u0027 (null-ptr-deref), p. ej. cuando la tarea actual est\u00e1 saliendo, como lo detect\u00f3 syzbot [1] usando acct(2). La estructura per-netns se puede obtener de table-\u0026gt;data usando Container_of(), luego la \u0027net\u0027 se puede recuperar del socket de escucha (si est\u00e1 disponible)."
          }
        ],
        "id": "CVE-2025-21635",
        "lastModified": "2026-10-30T13:17:50.720",
        "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"
            },
            {
              "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-21635",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:54:16.928023Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-01-19T11:15:09.000",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/33b3e09a489a31b30342b77cc55290f025d95c7e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6f353c2230c199f343406c08482940ec5d8ba89c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/de8d6de0ee27be4b2b1e5b06f04aeacbabbba492"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T10:46:40+00:00",
      "cve": "CVE-2025-21635",
      "id": "CVE-2025-21635",
      "initial_release_date": "2025-01-19T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "262",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-21635.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "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"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-21635",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T19:54:16.928023Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T15:55:12.740Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/rds/tcp.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "6f353c2230c199f343406c08482940ec5d8ba89c",
                  "status": "affected",
                  "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                  "versionType": "git"
                },
                {
                  "lessThan": "33b3e09a489a31b30342b77cc55290f025d95c7e",
                  "status": "affected",
                  "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                  "versionType": "git"
                },
                {
                  "lessThan": "de8d6de0ee27be4b2b1e5b06f04aeacbabbba492",
                  "status": "affected",
                  "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                  "versionType": "git"
                },
                {
                  "lessThan": "7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c",
                  "status": "affected",
                  "version": "c6a58ffed53612be86b758df1cdb0b0f4305e9cb",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/rds/tcp.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.6"
                },
                {
                  "lessThan": "4.6",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.191",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.160",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.10",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.13",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.191",
                      "versionStartIncluding": "4.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.160",
                      "versionStartIncluding": "4.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.10",
                      "versionStartIncluding": "4.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.13",
                      "versionStartIncluding": "4.6",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy\n\nAs mentioned in a previous commit of this series, using the \u0027net\u0027\nstructure via \u0027current\u0027 is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader\u0027s/writer\u0027s netns vs only\n  from the opener\u0027s netns.\n\n- current-\u003ensproxy can be NULL in some cases, resulting in an \u0027Oops\u0027\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe per-netns structure can be obtained from the table-\u003edata using\ncontainer_of(), then the \u0027net\u0027 one can be retrieved from the listen\nsocket (if available)."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-30T12:20:39.557Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/6f353c2230c199f343406c08482940ec5d8ba89c"
            },
            {
              "url": "https://git.kernel.org/stable/c/33b3e09a489a31b30342b77cc55290f025d95c7e"
            },
            {
              "url": "https://git.kernel.org/stable/c/de8d6de0ee27be4b2b1e5b06f04aeacbabbba492"
            },
            {
              "url": "https://git.kernel.org/stable/c/7f5611cbc4871c7fb1ad36c2e5a9edad63dca95c"
            }
          ],
          "title": "rds: sysctl: rds_tcp_{rcv,snd}buf: avoid using current-\u003ensproxy",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-21635",
        "datePublished": "2025-01-19T10:17:53.832Z",
        "dateReserved": "2024-12-29T08:45:45.726Z",
        "dateUpdated": "2026-10-30T12:20:39.557Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.