CVE-2025-68302 (GCVE-0-2025-68302)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:06 – Updated: 2026-08-05 12:10
VLAI
Title
net: sxgbe: fix potential NULL dereference in sxgbe_rx()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: sxgbe: fix potential NULL dereference in sxgbe_rx() Currently, when skb is null, the driver prints an error and then dereferences skb on the next line. To fix this, let's add a 'break' after the error message to switch to sxgbe_rx_refill(), which is similar to the approach taken by the other drivers in this particular case, e.g. calxeda with xgmac_rx(). Found during a code review.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < ac171c3c755499c9f87fe30b920602255f8b5648 (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < 18ef3ad1bb57dcf1a9ee61736039aedccf670b21 (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < 46e5332126596a2ca791140feab18ce1fc1a3c86 (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < 7fd789d6ea4915034eb6bcb72f6883c8151083e5 (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < 45b5b4ddb8d6bea5fc1625ff6f163bbb125d49cc (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < 88f46c0be77bfe45830ac33102c75be7c34ac3f3 (git)
Affected: 1edb9ca69e8a7988900fc0283e10550b5592164d , < f5bce28f6b9125502abec4a67d68eabcd24b3b17 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.15
Unaffected: 0 , < 3.15 (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.119 , ≤ 6.6.* (semver)
Unaffected: 6.12.61 , ≤ 6.12.* (semver)
Unaffected: 6.17.11 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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              "operator": "OR"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sxgbe: fix potential NULL dereference in sxgbe_rx()\n\nCurrently, when skb is null, the driver prints an error and then\ndereferences skb on the next line.\n\nTo fix this, let\u0027s add a \u0027break\u0027 after the error message to switch\nto sxgbe_rx_refill(), which is similar to the approach taken by the\nother drivers in this particular case, e.g. calxeda with xgmac_rx().\n\nFound during a code review."
        }
      ],
      "metrics": [
        {
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - Unauthenticated network traffic is processed by the SXGBE hardware receive ring before any protocol authentication, and routed packets can reach the affected NIC without requiring local or adjacent access.\nAC:L - A sustained packet flood can drive GFP_ATOMIC RX-buffer allocation failures and advance the receive cursor to the resulting dirty descriptor; the attacker controls and can repeatedly generate the required traffic.\nPR:N - The vulnerable receive path runs before authentication or privilege checks, so the remote sender requires no account, capability, or other privileges on the target.\nUI:N - Exploitation requires only delivery of network traffic to an active SXGBE interface and does not depend on any user action.\nS:U - The NULL dereference affects the same host kernel and does not cross a virtualization, IOMMU, or other distinct security boundary.\nC:N - The defect dereferences a NULL skb pointer and provides no attacker-controlled out-of-bounds read, use-after-free, or information-disclosure primitive.\nI:N - The defect is a pure NULL-pointer dereference with no attacker-controlled memory corruption, arbitrary write, or data-modification primitive.\nA:H - The NULL dereference occurs in the kernel NAPI receive path and can cause an oops or kernel panic, producing complete loss of availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:10:43.401Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ac171c3c755499c9f87fe30b920602255f8b5648"
        },
        {
          "url": "https://git.kernel.org/stable/c/18ef3ad1bb57dcf1a9ee61736039aedccf670b21"
        },
        {
          "url": "https://git.kernel.org/stable/c/46e5332126596a2ca791140feab18ce1fc1a3c86"
        },
        {
          "url": "https://git.kernel.org/stable/c/7fd789d6ea4915034eb6bcb72f6883c8151083e5"
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        },
        {
          "url": "https://git.kernel.org/stable/c/f5bce28f6b9125502abec4a67d68eabcd24b3b17"
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      ],
      "title": "net: sxgbe: fix potential NULL dereference in sxgbe_rx()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68302",
    "datePublished": "2025-12-16T15:06:20.420Z",
    "dateReserved": "2025-12-16T14:48:05.293Z",
    "dateUpdated": "2026-08-05T12:10:43.401Z",
    "state": "PUBLISHED"
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      "date": "2026-11-08",
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      "percentile": "0.39745"
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      "cve": "CVE-2025-68302",
      "id": "msrc_CVE-2025-68302",
      "initial_release_date": "2025-12-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net: sxgbe: fix potential NULL dereference in sxgbe_rx()",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-68302.json",
      "version": "2"
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                "versions": [
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                  },
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sxgbe: fix potential NULL dereference in sxgbe_rx()\n\nCurrently, when skb is null, the driver prints an error and then\ndereferences skb on the next line.\n\nTo fix this, let\u0027s add a \u0027break\u0027 after the error message to switch\nto sxgbe_rx_refill(), which is similar to the approach taken by the\nother drivers in this particular case, e.g. calxeda with xgmac_rx().\n\nFound during a code review."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: sxgbe: corregir posible desreferencia NULL en sxgbe_rx()\n\nActualmente, cuando skb es nulo, el controlador imprime un error y luego desreferencia skb en la siguiente l\u00ednea.\n\nPara solucionar esto, a\u00f1adamos un \u0027break\u0027 despu\u00e9s del mensaje de error para pasar a sxgbe_rx_refill(), lo cual es similar al enfoque adoptado por los otros controladores en este caso particular, p. ej. calxeda con xgmac_rx().\n\nEncontrado durante una revisi\u00f3n de c\u00f3digo."
          }
        ],
        "id": "CVE-2025-68302",
        "lastModified": "2026-10-13T19:10:00.193",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2025-12-16T16:16:09.727",
        "references": [
          {
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          {
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          },
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          },
          {
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            "url": "https://git.kernel.org/stable/c/88f46c0be77bfe45830ac33102c75be7c34ac3f3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ac171c3c755499c9f87fe30b920602255f8b5648"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f5bce28f6b9125502abec4a67d68eabcd24b3b17"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-07T04:20:54+00:00",
      "cve": "CVE-2025-68302",
      "id": "CVE-2025-68302",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_not_affected": "200",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel sxgbe driver: Denial of Service due to null pointer dereference",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68302.json",
      "version": "3"
    }
  }
}



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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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