CVE-2025-37890 (GCVE-0-2025-37890)

Vulnerability from cvelistv5 – Published: 2025-05-16 13:01 – Updated: 2026-06-11 18:44
VLAI
Title
net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc
Summary
In the Linux kernel, the following vulnerability has been resolved: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc As described in Gerrard's report [1], we have a UAF case when an hfsc class has a netem child qdisc. The crux of the issue is that hfsc is assuming that checking for cl->qdisc->q.qlen == 0 guarantees that it hasn't inserted the class in the vttree or eltree (which is not true for the netem duplicate case). This patch checks the n_active class variable to make sure that the code won't insert the class in the vttree or eltree twice, catering for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < 273bbcfa53541cde38b2003ad88a59b770306421 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < e0cf8ee23e1915431f262a7b2dee0c7a7d699af0 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < e3e949a39a91d1f829a4890e7dfe9417ac72e4d0 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < 8df7d37d626430035b413b97cee18396b3450bef (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < 6082a87af4c52f58150d40dec1716011d871ac21 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < 2e7093c7a8aba5d4f8809f271488e5babe75e202 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < ac39fd4a757584d78ed062d4f6fd913f83bd98b5 (git)
Affected: 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea , < 141d34391abbb315d68556b7c67ad97885407547 (git)
Create a notification for this product.
Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 5.4.294 , ≤ 5.4.* (semver)
Unaffected: 5.10.238 , ≤ 5.10.* (semver)
Unaffected: 5.15.182 , ≤ 5.15.* (semver)
Unaffected: 6.1.138 , ≤ 6.1.* (semver)
Unaffected: 6.6.90 , ≤ 6.6.* (semver)
Unaffected: 6.12.28 , ≤ 6.12.* (semver)
Unaffected: 6.14.6 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T19:57:02.260Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-37890",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-10T20:42:08.844756Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-11T18:44:19.853Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_hfsc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "273bbcfa53541cde38b2003ad88a59b770306421",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "e0cf8ee23e1915431f262a7b2dee0c7a7d699af0",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "e3e949a39a91d1f829a4890e7dfe9417ac72e4d0",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "8df7d37d626430035b413b97cee18396b3450bef",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "6082a87af4c52f58150d40dec1716011d871ac21",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "2e7093c7a8aba5d4f8809f271488e5babe75e202",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "ac39fd4a757584d78ed062d4f6fd913f83bd98b5",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            },
            {
              "lessThan": "141d34391abbb315d68556b7c67ad97885407547",
              "status": "affected",
              "version": "37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sched/sch_hfsc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.0"
            },
            {
              "lessThan": "5.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.294",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.182",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.138",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.28",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.294",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.238",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.182",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.138",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.90",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.28",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.6",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc\n\nAs described in Gerrard\u0027s report [1], we have a UAF case when an hfsc class\nhas a netem child qdisc. The crux of the issue is that hfsc is assuming\nthat checking for cl-\u003eqdisc-\u003eq.qlen == 0 guarantees that it hasn\u0027t inserted\nthe class in the vttree or eltree (which is not true for the netem\nduplicate case).\n\nThis patch checks the n_active class variable to make sure that the code\nwon\u0027t insert the class in the vttree or eltree twice, catering for the\nreentrant case.\n\n[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:17:06.552Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/273bbcfa53541cde38b2003ad88a59b770306421"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0cf8ee23e1915431f262a7b2dee0c7a7d699af0"
        },
        {
          "url": "https://git.kernel.org/stable/c/e3e949a39a91d1f829a4890e7dfe9417ac72e4d0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8df7d37d626430035b413b97cee18396b3450bef"
        },
        {
          "url": "https://git.kernel.org/stable/c/6082a87af4c52f58150d40dec1716011d871ac21"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e7093c7a8aba5d4f8809f271488e5babe75e202"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac39fd4a757584d78ed062d4f6fd913f83bd98b5"
        },
        {
          "url": "https://git.kernel.org/stable/c/141d34391abbb315d68556b7c67ad97885407547"
        }
      ],
      "title": "net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37890",
    "datePublished": "2025-05-16T13:01:12.798Z",
    "dateReserved": "2025-04-16T04:51:23.963Z",
    "dateUpdated": "2026-06-11T18:44:19.853Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-37890",
      "date": "2026-06-28",
      "epss": "0.00165",
      "percentile": "0.06105"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37890\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-16T13:15:52.437\",\"lastModified\":\"2026-06-17T09:15:38.553\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc\\n\\nAs described in Gerrard\u0027s report [1], we have a UAF case when an hfsc class\\nhas a netem child qdisc. The crux of the issue is that hfsc is assuming\\nthat checking for cl-\u003eqdisc-\u003eq.qlen == 0 guarantees that it hasn\u0027t inserted\\nthe class in the vttree or eltree (which is not true for the netem\\nduplicate case).\\n\\nThis patch checks the n_active class variable to make sure that the code\\nwon\u0027t insert the class in the vttree or eltree twice, catering for the\\nreentrant case.\\n\\n[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net_sched: hfsc: corrige una vulnerabilidad UAF en la clase con netem como qdisc hijo Como se describe en el informe de Gerrard [1], tenemos un caso UAF cuando una clase hfsc tiene una qdisc hijo netem. El quid de la cuesti\u00f3n es que hfsc asume que la comprobaci\u00f3n de cl-\u0026gt;qdisc-\u0026gt;q.qlen == 0 garantiza que no ha insertado la clase en vttree o eltree (lo que no es cierto para el caso de duplicado de netem). Este parche comprueba la variable de clase n_active para asegurarse de que el c\u00f3digo no inserte la clase en vttree o eltree dos veces, atendiendo al caso reentrante. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sched/sch_hfsc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"273bbcfa53541cde38b2003ad88a59b770306421\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"e0cf8ee23e1915431f262a7b2dee0c7a7d699af0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"e3e949a39a91d1f829a4890e7dfe9417ac72e4d0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"8df7d37d626430035b413b97cee18396b3450bef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"6082a87af4c52f58150d40dec1716011d871ac21\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"2e7093c7a8aba5d4f8809f271488e5babe75e202\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"ac39fd4a757584d78ed062d4f6fd913f83bd98b5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\",\"lessThan\":\"141d34391abbb315d68556b7c67ad97885407547\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sched/sch_hfsc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.294\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.238\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.182\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.138\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.90\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.28\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.14.6\",\"lessThanOrEqual\":\"6.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.15\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-06-10T20:42:08.844756Z\",\"id\":\"CVE-2025-37890\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.0.1\",\"versionEndExcluding\":\"5.4.294\",\"matchCriteriaId\":\"DEC27C91-8035-49D5-8C57-B8F8541B23F7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.238\",\"matchCriteriaId\":\"0DAAEF7F-D560-47FC-8B65-20404DB82432\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.182\",\"matchCriteriaId\":\"57E76AE8-79D9-4EC8-9845-9A86B1ED152E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.138\",\"matchCriteriaId\":\"B6266F82-46B4-4D38-AC4A-54C92A1DFAB2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.90\",\"matchCriteriaId\":\"2BE1DB09-2D62-4C63-AF19-947300669741\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.28\",\"matchCriteriaId\":\"5082CE19-0F3D-4521-AB3E-810D8255F500\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.14.6\",\"matchCriteriaId\":\"19E5095E-5950-43EA-8E78-FC860855293F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"1D0FE595-0CFE-4491-808B-CEF691CE7B0A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"963CFC36-FBAD-465F-9891-CDBBF962DFDD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"1B084A7A-6047-4804-9395-6000E4A43828\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"C3430640-AC87-44BF-ABF5-09E0A97E3758\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"FDF49B77-4688-4908-9239-89B729456D22\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"77F342FB-3D7B-4EAE-BF8B-57B7B860BAFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"47D61679-6515-4E18-83C7-A71982CCD83C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8D465631-2980-487A-8E65-40AE2B9F8ED1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4C9D071F-B28E-46EC-AC61-22B913390211\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"13FC0DDE-E513-465E-9E81-515702D49B74\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"8C7B5B0E-4EEB-48F5-B4CF-0935A7633845\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FA6FEEC2-9F11-4643-8827-749718254FED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/141d34391abbb315d68556b7c67ad97885407547\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/273bbcfa53541cde38b2003ad88a59b770306421\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2e7093c7a8aba5d4f8809f271488e5babe75e202\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6082a87af4c52f58150d40dec1716011d871ac21\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8df7d37d626430035b413b97cee18396b3450bef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ac39fd4a757584d78ed062d4f6fd913f83bd98b5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e0cf8ee23e1915431f262a7b2dee0c7a7d699af0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e3e949a39a91d1f829a4890e7dfe9417ac72e4d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T19:57:02.260Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-37890\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-10T20:42:08.844756Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-11T17:39:06.216Z\"}}], \"cna\": {\"title\": \"net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"273bbcfa53541cde38b2003ad88a59b770306421\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"e0cf8ee23e1915431f262a7b2dee0c7a7d699af0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"e3e949a39a91d1f829a4890e7dfe9417ac72e4d0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"8df7d37d626430035b413b97cee18396b3450bef\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"6082a87af4c52f58150d40dec1716011d871ac21\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"2e7093c7a8aba5d4f8809f271488e5babe75e202\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"ac39fd4a757584d78ed062d4f6fd913f83bd98b5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea\", \"lessThan\": \"141d34391abbb315d68556b7c67ad97885407547\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/sch_hfsc.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.294\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.238\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.182\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.138\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.90\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.28\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.14.*\"}, {\"status\": \"unaffected\", \"version\": \"6.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/sch_hfsc.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/273bbcfa53541cde38b2003ad88a59b770306421\"}, {\"url\": \"https://git.kernel.org/stable/c/e0cf8ee23e1915431f262a7b2dee0c7a7d699af0\"}, {\"url\": \"https://git.kernel.org/stable/c/e3e949a39a91d1f829a4890e7dfe9417ac72e4d0\"}, {\"url\": \"https://git.kernel.org/stable/c/8df7d37d626430035b413b97cee18396b3450bef\"}, {\"url\": \"https://git.kernel.org/stable/c/6082a87af4c52f58150d40dec1716011d871ac21\"}, {\"url\": \"https://git.kernel.org/stable/c/2e7093c7a8aba5d4f8809f271488e5babe75e202\"}, {\"url\": \"https://git.kernel.org/stable/c/ac39fd4a757584d78ed062d4f6fd913f83bd98b5\"}, {\"url\": \"https://git.kernel.org/stable/c/141d34391abbb315d68556b7c67ad97885407547\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc\\n\\nAs described in Gerrard\u0027s report [1], we have a UAF case when an hfsc class\\nhas a netem child qdisc. The crux of the issue is that hfsc is assuming\\nthat checking for cl-\u003eqdisc-\u003eq.qlen == 0 guarantees that it hasn\u0027t inserted\\nthe class in the vttree or eltree (which is not true for the netem\\nduplicate case).\\n\\nThis patch checks the n_active class variable to make sure that the code\\nwon\u0027t insert the class in the vttree or eltree twice, catering for the\\nreentrant case.\\n\\n[1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.294\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.238\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.182\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.138\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.90\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.28\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14.6\", \"versionStartIncluding\": \"5.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.15\", \"versionStartIncluding\": \"5.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T21:17:06.552Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-37890\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-11T18:44:19.853Z\", \"dateReserved\": \"2025-04-16T04:51:23.963Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-05-16T13:01:12.798Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.