{
  "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-2025-21901",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:24:32.667966Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:26:35.142Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/bnxt_re/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aed1bc673907e3df372b317c10ff2f3582f8bf1a",
              "status": "affected",
              "version": "cc5b9b48d44756a87170f3901c6c2fd99e6b89b2",
              "versionType": "git"
            },
            {
              "lessThan": "8cb0eef46d70a99c88c26a1addb7fd955242e0e6",
              "status": "affected",
              "version": "cc5b9b48d44756a87170f3901c6c2fd99e6b89b2",
              "versionType": "git"
            },
            {
              "lessThan": "f0df225d12fcb049429fb5bf5122afe143c2dd15",
              "status": "affected",
              "version": "cc5b9b48d44756a87170f3901c6c2fd99e6b89b2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/infiniband/hw/bnxt_re/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.18",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.6",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Add sanity checks on rdev validity\n\nThere is a possibility that ulp_irq_stop and ulp_irq_start\ncallbacks will be called when the device is in detached state.\nThis can cause a crash due to NULL pointer dereference as\nthe rdev is already freed."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable callbacks are driven by local device-management and error-recovery paths (ethtool ring/channel reconfiguration, devlink/FW reset, SR-IOV reconfiguration, PM suspend/resume, PCIe AER), not by data received from a remote peer. A remote RoCE/Ethernet peer cannot reach `bnxt_re_stop_irq()`/`bnxt_re_start_irq()`.\nAC:L - In the AER and FW-recovery sequences the L2 driver unconditionally calls `bnxt_ulp_irq_stop()`/`bnxt_ulp_irq_restart()` after `bnxt_ulp_stop()` has already freed `rdev`, so the stale-pointer dereference is deterministic rather than racy. Where a window must be hit, the attacker drives both sides \u2014 initiating the reset/suspend and issuing the ring-reservation request that calls `bnxt_ulp_irq_stop()`.\nPR:L - Entering the detached window needs only an unprivileged-reachable action such as a logind-permitted system suspend/resume cycle, or a CAP_NET_ADMIN-scoped ethtool ring/channel reconfiguration available to non-root network workloads; once detached, the use-after-free fires from the driver\u0027s own recovery path with no further privilege. It does not require full root in the initial namespace.\nUI:N - No victim action is needed \u2014 the free and the subsequent dereference both occur inside the driver\u0027s suspend/irq-restart sequence once the reset or suspend is under way.\nS:U - The corruption is confined to kernel memory within the same security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - This is a use-after-free on the freed `bnxt_re_dev`: `bnxt_re_start_irq()` reads `rdev-\u003enqr` and `rdev-\u003enqr-\u003enum_msix` out of the freed slab, so an attacker who reclaims the object controls a pointer that is then followed, yielding an arbitrary-read primitive and disclosure of kernel memory.\nI:H - `bnxt_re_stop_irq()` performs `set_bit()` writes directly into the freed object and `wake_up_all()` walks a wait-queue list from freed memory invoking `wq_entry-\u003efunc()`, while `bnxt_re_start_irq()` writes `rdev-\u003enqr-\u003emsix_entries[indx].vector` through a pointer read from the freed slab \u2014 together a write-what-where and control-flow hijack primitive.\nA:H - Even without heap grooming the dereference of the freed `rdev` (typically a NULL `rdev-\u003enqr` or poisoned contents) causes a kernel oops/panic, and it occurs precisely during firmware/PCIe error recovery, turning a recoverable device fault into a full system crash."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:55:16.513Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aed1bc673907e3df372b317c10ff2f3582f8bf1a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8cb0eef46d70a99c88c26a1addb7fd955242e0e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0df225d12fcb049429fb5bf5122afe143c2dd15"
        }
      ],
      "title": "RDMA/bnxt_re: Add sanity checks on rdev validity",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21901",
    "datePublished": "2025-04-01T15:26:51.807Z",
    "dateReserved": "2024-12-29T08:45:45.785Z",
    "dateUpdated": "2026-08-05T11:55:16.513Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}