FKIE_CVE-2026-80613

Vulnerability from fkie_nvd - Published: 2026-08-28 08:16 - Updated: 2026-08-29 07:16
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: veth: fix NAPI leak in XDP enable error path During XDP enablement in veth, if xdp_rxq_info_reg() or xdp_rxq_info_reg_mem_model() fails, the driver rolls back the changes. However, the rollback loop: for (i--; i >= start; i--) { decrements the loop index 'i' before the first iteration. This correctly skips unregistering the rxq for the failed index 'i' (as registration failed or was already cleaned up), but it also erroneously skips calling netif_napi_deli() for rq[i].xdp_napi. Since netif_napi_add() was already called for index 'i', this leaves a dangling napi_struct in the device's napi_list. When the veth device is later destroyed, the freed queue memory (which contains the leaked NAPI structure) can be reused. The subsequent device teardown iterates the NAPI list and corrupts the reallocated memory, leading to UAF. Fix this by explicitly deleting the NAPI association for the failed index 'i' before rolling back the successfully configured queues.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/veth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fc51373345e7e6ea73da2650cb497309c50b077a",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "4559770b2a241344d762719e674241fcc8528f02",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "83090f5e7b54721d71875a6c224d2490b9e73050",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "d3eb258ad398cc9402bab3a5e730cd7c5b34efad",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "a9e6707322ef215d39d4655b176c094f45f0ab52",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "4bd2e5dbe62334aae1182d0f0d260f334a49d739",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            },
            {
              "lessThan": "6739027cb72da26890edd424c77080d187b2a92e",
              "status": "affected",
              "version": "b02e5a0ebb172c8276cea3151942aac681f7a4a6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/veth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.11"
            },
            {
              "lessThan": "5.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nveth: fix NAPI leak in XDP enable error path\n\nDuring XDP enablement in veth, if xdp_rxq_info_reg() or\nxdp_rxq_info_reg_mem_model() fails, the driver rolls back the changes.\n\nHowever, the rollback loop:\n\tfor (i--; i \u003e= start; i--) {\n\ndecrements the loop index \u0027i\u0027 before the first iteration. This\ncorrectly skips unregistering the rxq for the failed index \u0027i\u0027 (as\nregistration failed or was already cleaned up), but it also\nerroneously skips calling netif_napi_deli() for rq[i].xdp_napi.\n\nSince netif_napi_add() was already called for index \u0027i\u0027, this leaves\na dangling napi_struct in the device\u0027s napi_list. When the veth\ndevice is later destroyed, the freed queue memory (which contains the\nleaked NAPI structure) can be reused.\n\nThe subsequent device teardown iterates the NAPI list and\ncorrupts the reallocated memory, leading to UAF.\n\nFix this by explicitly deleting the NAPI association for the failed\nindex \u0027i\u0027 before rolling back the successfully configured queues."
    }
  ],
  "id": "CVE-2026-80613",
  "lastModified": "2026-08-29T07:16:46.123",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-28T08:16:45.303",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4559770b2a241344d762719e674241fcc8528f02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4bd2e5dbe62334aae1182d0f0d260f334a49d739"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6739027cb72da26890edd424c77080d187b2a92e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/83090f5e7b54721d71875a6c224d2490b9e73050"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a9e6707322ef215d39d4655b176c094f45f0ab52"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d3eb258ad398cc9402bab3a5e730cd7c5b34efad"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fc51373345e7e6ea73da2650cb497309c50b077a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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