Vulnerability-Lookup

GHSA-FRFW-F98C-6JVJ

Vulnerability from github – Published: 2024-11-09 12:30 – Updated: 2025-11-04 00:31

Details

In the Linux kernel, the following vulnerability has been resolved:

nvmet-auth: assign dh_key to NULL after kfree_sensitive

ctrl->dh_key might be used across multiple calls to nvmet_setup_dhgroup() for the same controller. So it's better to nullify it after release on error path in order to avoid double free later in nvmet_destroy_auth().

Found by Linux Verification Center (linuxtesting.org) with Svace.

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2024-50215"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-415"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-09T11:15:06Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: assign dh_key to NULL after kfree_sensitive\n\nctrl-\u003edh_key might be used across multiple calls to nvmet_setup_dhgroup()\nfor the same controller. So it\u0027s better to nullify it after release on\nerror path in order to avoid double free later in nvmet_destroy_auth().\n\nFound by Linux Verification Center (linuxtesting.org) with Svace.",
  "id": "GHSA-frfw-f98c-6jvj",
  "modified": "2025-11-04T00:31:58Z",
  "published": "2024-11-09T12:30:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50215"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c60af16e1d6cc2237d58336546d6adfc067b6b8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c94e965f766321641ec38e4eece9ce8884543244"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2f551b1f72b4c508ab9298419f6feadc3b5d791"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e61bd51e44409495d75847e9230736593e4c8710"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50215 (GCVE-0-2024-50215)

Vulnerability from cvelistv5 – Published: 2024-11-09 10:14 – Updated: 2026-08-05 11:42

Title

nvmet-auth: assign dh_key to NULL after kfree_sensitive

Summary

In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: assign dh_key to NULL after kfree_sensitive ctrl->dh_key might be used across multiple calls to nvmet_setup_dhgroup() for the same controller. So it's better to nullify it after release on error path in order to avoid double free later in nvmet_destroy_auth(). Found by Linux Verification Center (linuxtesting.org) with Svace.

Severity

8.1 (High)


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

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 2025-10-01 20:17 UTC

CWE

CWE-415 - Double Free

Assigner

Linux mitre root Scorecard

References

5 references

URL	Tags
https://git.kernel.org/stable/c/c94e965f766321641…
https://git.kernel.org/stable/c/c60af16e1d6cc2237…
https://git.kernel.org/stable/c/e61bd51e44409495d…
https://git.kernel.org/stable/c/d2f551b1f72b4c508…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7a277c37d3522e9b2777d762bbbcecafae2b1f8d , < c94e965f766321641ec38e4eece9ce8884543244 (git) Affected: 7a277c37d3522e9b2777d762bbbcecafae2b1f8d , < c60af16e1d6cc2237d58336546d6adfc067b6b8f (git) Affected: 7a277c37d3522e9b2777d762bbbcecafae2b1f8d , < e61bd51e44409495d75847e9230736593e4c8710 (git) Affected: 7a277c37d3522e9b2777d762bbbcecafae2b1f8d , < d2f551b1f72b4c508ab9298419f6feadc3b5d791 (git)
Linux	Linux	Affected: 6.0 Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.116 , ≤ 6.1.* (semver) Unaffected: 6.6.60 , ≤ 6.6.* (semver) Unaffected: 6.11.7 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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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-2024-50215",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:17:09.200980Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-415",
                "description": "CWE-415 Double Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T20:27:05.214Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:27:06.690Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
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    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
            {
              "lessThan": "c60af16e1d6cc2237d58336546d6adfc067b6b8f",
              "status": "affected",
              "version": "7a277c37d3522e9b2777d762bbbcecafae2b1f8d",
              "versionType": "git"
            },
            {
              "lessThan": "e61bd51e44409495d75847e9230736593e4c8710",
              "status": "affected",
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              "status": "affected",
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          "versions": [
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.60",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.116",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.60",
                  "versionStartIncluding": "6.0",
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                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: assign dh_key to NULL after kfree_sensitive\n\nctrl-\u003edh_key might be used across multiple calls to nvmet_setup_dhgroup()\nfor the same controller. So it\u0027s better to nullify it after release on\nerror path in order to avoid double free later in nvmet_destroy_auth().\n\nFound by Linux Verification Center (linuxtesting.org) with Svace."
        }
      ],
      "metrics": [
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          "cvssV3_1": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - `nvmet_setup_dhgroup()` executes on behalf of remote NVMe-oF fabric commands \u2014 the admin Connect command (`nvmet_execute_admin_connect()`) and the AUTH_Send DH-HMAC-CHAP NEGOTIATE restart \u2014 delivered by nvmet-tcp on TCP/4420 (or RDMA/FC) from an arbitrary remote initiator. No local access to the target is needed to drive the vulnerable function.\nAC:H - Two preconditions lie entirely outside the attacker\u0027s control: `ctrl-\u003edh_gid` must diverge from `host-\u003edhchap_dhgroup_id` (the negotiate loop can only re-assign `dh_gid` to its existing value, so this requires an administrator changing `dhchap_dhgroup` via configfs between two setups), and `crypto_kpp_set_secret()` must fail, which happens only on a small GFP_KERNEL/MPI allocation failure or default-RNG failure that the kernel does not produce without OOM-killing first.\nPR:N - The code path is the authentication setup itself and runs before DH-HMAC-CHAP completes (`sq-\u003eauthenticated == false`); the only credential involved is the host NQN, a non-secret identifier the attacker chooses in the Connect payload. No prior authentication or account on the target is required.\nUI:N - No victim action participates in the attack \u2014 the attacker alone issues Connect and AUTH_Send commands and later disconnects to drive `nvmet_ctrl_free()` \u2192 `nvmet_destroy_auth()`. The DH-group configfs setting is pre-existing system configuration, not user interaction.\nS:U - The double free corrupts kernel slab state within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - A double free of the 256\u20131024 byte `ctrl-\u003edh_key` in a general-purpose kmalloc cache lets the same slab object be handed out twice; with the heap grooming the remote peer already has on the target (`kmalloc(tl, GFP_KERNEL)` with attacker-chosen `tl` in `nvmet_execute_auth_send()`), this yields a UAF-style read primitive over adjacent/overlapping kernel objects, including the DH private key material itself.\nI:H - The same aliased-allocation primitive gives an attacker-controlled write into an object another kernel subsystem believes it owns, corrupting SLUB freelist metadata and enabling control-flow hijacking in the classic double-free exploitation pattern.\nA:H - Even unexploited, the second `kfree_sensitive()` on the dangling pointer trips SLUB double-free detection (BUG/panic with `slub_debug` or `panic_on_oops`) or corrupts the freelist into a later fatal oops, taking down the storage target."
            }
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          "url": "https://git.kernel.org/stable/c/d2f551b1f72b4c508ab9298419f6feadc3b5d791"
        }
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      "title": "nvmet-auth: assign dh_key to NULL after kfree_sensitive",
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        "engine": "bippy-1.2.0"
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50215",
    "datePublished": "2024-11-09T10:14:27.043Z",
    "dateReserved": "2024-10-21T19:36:19.971Z",
    "dateUpdated": "2026-08-05T11:42:33.611Z",
    "state": "PUBLISHED"
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  "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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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GHSA-FRFW-F98C-6JVJ

CVE-2024-50215 (GCVE-0-2024-50215)

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