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EUVD-2026-344665

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:57

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:57:23.385027+00:00",
  "id": "EUVD-2026-344665"
}

CVE-2022-49085 (GCVE-0-2022-49085)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53

Title

drbd: Fix five use after free bugs in get_initial_state

Summary

In the Linux kernel, the following vulnerability has been resolved: drbd: Fix five use after free bugs in get_initial_state In get_initial_state, it calls notify_initial_state_done(skb,..) if cb->args[5]==1. If genlmsg_put() failed in notify_initial_state_done(), the skb will be freed by nlmsg_free(skb). Then get_initial_state will goto out and the freed skb will be used by return value skb->len, which is a uaf bug. What's worse, the same problem goes even further: skb can also be freed in the notify_*_state_change -> notify_*_state calls below. Thus 4 additional uaf bugs happened. My patch lets the problem callee functions: notify_initial_state_done and notify_*_state_change return an error code if errors happen. So that the error codes could be propagated and the uaf bugs can be avoid. v2 reports a compilation warning. This v3 fixed this warning and built successfully in my local environment with no additional warnings. v2: https://lore.kernel.org/patchwork/patch/1435218/

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-27 17:59 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/0489700bfeb1e53eb…
https://git.kernel.org/stable/c/dcf6be17b5c53b741…
https://git.kernel.org/stable/c/188fe6b26765edbad…
https://git.kernel.org/stable/c/b6a4055036eed1f5e…
https://git.kernel.org/stable/c/594205b4936771a25…
https://git.kernel.org/stable/c/a972c768723359ec9…
https://git.kernel.org/stable/c/de63e74da2333b406…
https://git.kernel.org/stable/c/226e993c394052927…
https://git.kernel.org/stable/c/aadb22ba2f656581b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 0489700bfeb1e53eb2039c2291c67e71b0b40103 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < dcf6be17b5c53b741898d2223b23e66d682de300 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 188fe6b26765edbad4055611c0f788b6870f4024 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < b6a4055036eed1f5e239ce3d8b0db1ce38bba447 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 594205b4936771a250f9d141e7e0fff21c3dd2d9 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < a972c768723359ec995579902473028fe3cd64b1 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < de63e74da2333b4068bb79983e632db730fea97e (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < 226e993c39405292781bfcf4b039a8db56aab362 (git) Affected: a29728463b254ce81ecefdf20c1a02e01d9361da , < aadb22ba2f656581b2f733deb3a467c48cc618f6 (git)
Linux	Linux	Affected: 4.5 Unaffected: 0 , < 4.5 (semver) Unaffected: 4.9.311 , ≤ 4.9.* (semver) Unaffected: 4.14.276 , ≤ 4.14.* (semver) Unaffected: 4.19.238 , ≤ 4.19.* (semver) Unaffected: 5.4.189 , ≤ 5.4.* (semver) Unaffected: 5.10.111 , ≤ 5.10.* (semver) Unaffected: 5.15.34 , ≤ 5.15.* (semver) Unaffected: 5.16.20 , ≤ 5.16.* (semver) Unaffected: 5.17.3 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49085",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T17:59:12.644580Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:02:29.848Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/drbd/drbd_int.h",
            "drivers/block/drbd/drbd_nl.c",
            "drivers/block/drbd/drbd_state.c",
            "drivers/block/drbd/drbd_state_change.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0489700bfeb1e53eb2039c2291c67e71b0b40103",
              "status": "affected",
              "version": "a29728463b254ce81ecefdf20c1a02e01d9361da",
              "versionType": "git"
            },
            {
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            },
            {
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              "status": "affected",
              "version": "a29728463b254ce81ecefdf20c1a02e01d9361da",
              "versionType": "git"
            },
            {
              "lessThan": "b6a4055036eed1f5e239ce3d8b0db1ce38bba447",
              "status": "affected",
              "version": "a29728463b254ce81ecefdf20c1a02e01d9361da",
              "versionType": "git"
            },
            {
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              "versionType": "git"
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            {
              "lessThan": "de63e74da2333b4068bb79983e632db730fea97e",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "aadb22ba2f656581b2f733deb3a467c48cc618f6",
              "status": "affected",
              "version": "a29728463b254ce81ecefdf20c1a02e01d9361da",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/block/drbd/drbd_int.h",
            "drivers/block/drbd/drbd_nl.c",
            "drivers/block/drbd/drbd_state.c",
            "drivers/block/drbd/drbd_state_change.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "lessThan": "4.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.311",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.276",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.238",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.20",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.311",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.276",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.238",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.189",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.111",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.34",
                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.5",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrbd: Fix five use after free bugs in get_initial_state\n\nIn get_initial_state, it calls notify_initial_state_done(skb,..) if\ncb-\u003eargs[5]==1. If genlmsg_put() failed in notify_initial_state_done(),\nthe skb will be freed by nlmsg_free(skb).\nThen get_initial_state will goto out and the freed skb will be used by\nreturn value skb-\u003elen, which is a uaf bug.\n\nWhat\u0027s worse, the same problem goes even further: skb can also be\nfreed in the notify_*_state_change -\u003e notify_*_state calls below.\nThus 4 additional uaf bugs happened.\n\nMy patch lets the problem callee functions: notify_initial_state_done\nand notify_*_state_change return an error code if errors happen.\nSo that the error codes could be propagated and the uaf bugs can be avoid.\n\nv2 reports a compilation warning. This v3 fixed this warning and built\nsuccessfully in my local environment with no additional warnings.\nv2: https://lore.kernel.org/patchwork/patch/1435218/"
        }
      ],
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            "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 path is reached via the DRBD generic netlink dump command DRBD_ADM_GET_INITIAL_STATE (local netlink syscall), not via DRBD\u2019s replication network protocol or packet processing.\nAC:L - An attacker can invoke the dumpit path at will; the bug is a use-after-free on the dump skb after nlmsg_free(), and UAF exploitation does not depend on a race or other conditions outside attacker influence.\nPR:L - DRBD_ADM_GET_INITIAL_STATE is registered without GENL_ADMIN_PERM and does not go through drbd_adm_prepare\u2019s CAP_NET_ADMIN check, so an unprivileged local user can trigger it.\nUI:N - Exploitation requires only sending a netlink dump request; no victim action such as mounting a device or opening a file is needed.\nS:U - Impact is confined to the local kernel\u2019s security authority (standard local privilege-escalation/DoS via heap UAF), with no VM/IOMMU/sandbox boundary crossing.\nC:H - Freeing the dump skb and then continuing to use it (skb-\u003elen read, then netlink_dump send/free paths) is a heap use-after-free that can expose or be leveraged for arbitrary kernel memory disclosure.\nI:H - The same UAF/double-free of the netlink dump skb enables heap corruption and write primitives suitable for control-flow hijacking or arbitrary kernel writes.\nA:H - Use-after-free and double-free of the dump skb can cause kernel oops/panic or otherwise crash the system when the freed object is reused."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:48.711Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0489700bfeb1e53eb2039c2291c67e71b0b40103"
        },
        {
          "url": "https://git.kernel.org/stable/c/dcf6be17b5c53b741898d2223b23e66d682de300"
        },
        {
          "url": "https://git.kernel.org/stable/c/188fe6b26765edbad4055611c0f788b6870f4024"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6a4055036eed1f5e239ce3d8b0db1ce38bba447"
        },
        {
          "url": "https://git.kernel.org/stable/c/594205b4936771a250f9d141e7e0fff21c3dd2d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/a972c768723359ec995579902473028fe3cd64b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/de63e74da2333b4068bb79983e632db730fea97e"
        },
        {
          "url": "https://git.kernel.org/stable/c/226e993c39405292781bfcf4b039a8db56aab362"
        },
        {
          "url": "https://git.kernel.org/stable/c/aadb22ba2f656581b2f733deb3a467c48cc618f6"
        }
      ],
      "title": "drbd: Fix five use after free bugs in get_initial_state",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49085",
    "datePublished": "2025-02-26T01:54:43.579Z",
    "dateReserved": "2025-02-26T01:49:39.248Z",
    "dateUpdated": "2026-08-05T08:53:48.711Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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EUVD-2026-344665

CVE-2022-49085 (GCVE-0-2022-49085)

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Nomenclature

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