CVE-2026-22994 (GCVE-0-2026-22994)
Vulnerability from cvelistv5
Published
2026-01-23 15:24
Modified
2026-05-11 21:57
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix reference count leak in bpf_prog_test_run_xdp() syzbot is reporting unregister_netdevice: waiting for sit0 to become free. Usage count = 2 problem. A debug printk() patch found that a refcount is obtained at xdp_convert_md_to_buff() from bpf_prog_test_run_xdp(). According to commit ec94670fcb3b ("bpf: Support specifying ingress via xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md(). Therefore, we can consider that the error handling path introduced by commit 1c1949982524 ("bpf: introduce frags support to bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().
References
Impacted products
Vendor Product Version
Linux Linux Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
Version: 1c194998252469cad00a08bd9ef0b99fd255c260
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bpf/test_run.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "368569bc546d3368ee9980ba79fc42fdff9a3365",
              "status": "affected",
              "version": "1c194998252469cad00a08bd9ef0b99fd255c260",
              "versionType": "git"
            },
            {
              "lessThan": "98676ee71fd4eafeb8be63c7f3f1905d40e03101",
              "status": "affected",
              "version": "1c194998252469cad00a08bd9ef0b99fd255c260",
              "versionType": "git"
            },
            {
              "lessThan": "fb9ef40cccdbacce36029b305d0ef1e12e4fea38",
              "status": "affected",
              "version": "1c194998252469cad00a08bd9ef0b99fd255c260",
              "versionType": "git"
            },
            {
              "lessThan": "737be05a765761d7d7c9f7fe92274bd8e6f6951e",
              "status": "affected",
              "version": "1c194998252469cad00a08bd9ef0b99fd255c260",
              "versionType": "git"
            },
            {
              "lessThan": "ec69daabe45256f98ac86c651b8ad1b2574489a7",
              "status": "affected",
              "version": "1c194998252469cad00a08bd9ef0b99fd255c260",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bpf/test_run.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.161",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.121",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.66",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix reference count leak in bpf_prog_test_run_xdp()\n\nsyzbot is reporting\n\n  unregister_netdevice: waiting for sit0 to become free. Usage count = 2\n\nproblem. A debug printk() patch found that a refcount is obtained at\nxdp_convert_md_to_buff() from bpf_prog_test_run_xdp().\n\nAccording to commit ec94670fcb3b (\"bpf: Support specifying ingress via\nxdp_md context in BPF_PROG_TEST_RUN\"), the refcount obtained by\nxdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md().\n\nTherefore, we can consider that the error handling path introduced by\ncommit 1c1949982524 (\"bpf: introduce frags support to\nbpf_prog_test_run_xdp()\") forgot to call xdp_convert_buff_to_md()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:57:56.914Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365"
        },
        {
          "url": "https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38"
        },
        {
          "url": "https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7"
        }
      ],
      "title": "bpf: Fix reference count leak in bpf_prog_test_run_xdp()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-22994",
    "datePublished": "2026-01-23T15:24:14.749Z",
    "dateReserved": "2026-01-13T15:37:45.937Z",
    "dateUpdated": "2026-05-11T21:57:56.914Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.