CVE-2024-35862 (GCVE-0-2024-35862)
Vulnerability from cvelistv5
Published
2024-05-19 08:34
Modified
2026-08-05 11:30
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF in smb2_is_network_name_deleted() Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF.
References
Impacted products
Vendor Product Version
Linux Linux Version: 9e550b085206544bd03a8b1dd58a5414e9508351
Version: 9e550b085206544bd03a8b1dd58a5414e9508351
Version: 9e550b085206544bd03a8b1dd58a5414e9508351
Version: 9e550b085206544bd03a8b1dd58a5414e9508351
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T03:21:48.581Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/f9414004798d9742c1af23a1d839fe6a9503751c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/aa582b33f94453fdeaff1e7d0aa252c505975e01"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/d919b6ea15ffa56fbafef4a1d92f47aeda9af645"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/63981561ffd2d4987807df4126f96a11e18b0c1d"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-35862",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:41:27.598442Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:17.367Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f9414004798d9742c1af23a1d839fe6a9503751c",
              "status": "affected",
              "version": "9e550b085206544bd03a8b1dd58a5414e9508351",
              "versionType": "git"
            },
            {
              "lessThan": "aa582b33f94453fdeaff1e7d0aa252c505975e01",
              "status": "affected",
              "version": "9e550b085206544bd03a8b1dd58a5414e9508351",
              "versionType": "git"
            },
            {
              "lessThan": "d919b6ea15ffa56fbafef4a1d92f47aeda9af645",
              "status": "affected",
              "version": "9e550b085206544bd03a8b1dd58a5414e9508351",
              "versionType": "git"
            },
            {
              "lessThan": "63981561ffd2d4987807df4126f96a11e18b0c1d",
              "status": "affected",
              "version": "9e550b085206544bd03a8b1dd58a5414e9508351",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.85",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.26",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.85",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.26",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.5",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix potential UAF in smb2_is_network_name_deleted()\n\nSkip sessions that are being teared down (status == SES_EXITING) to\navoid UAF."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable function is invoked by the CIFS demultiplex thread on every SMB2 response received over TCP/445, keyed entirely on server-supplied fields (`Status` and `Id.SyncId.TreeId`). A malicious SMB server, or an off-path/MITM attacker injecting into an unsigned SMB connection, triggers it purely with network data.\nAC:L - The remote peer controls both sides of the race: it forces the session teardown (failed reconnect/session setup drives `__cifs_put_smb_ses()`), and it holds the SES_EXITING window open for the full request timeout simply by not answering the SMB2 LOGOFF, while flooding STATUS_NETWORK_NAME_DELETED responses. The attempt is freely repeatable with no attacker-uncontrollable precondition.\nPR:N - The attacker is the remote SMB peer and needs no credentials or privileges on the target Linux client; the code path runs in the kernel demux thread before any signature validation of the response.\nUI:N - The attack works against an already-established mount \u2014 an fstab/autofs/systemd-automount or DFS-referral connection, or a file server compromised or MITM\u0027d after mount \u2014 and the server itself induces the session teardown, so no victim action is required.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free on `cifs_tcon`/`cifs_ses` gives an attacker-influenced read of freed slab contents, and `pr_warn_once(\"%s\", tcon-\u003etree_name)` walks freed heap memory into the kernel log, leaking whatever now occupies that object.\nI:H - The path writes into freed memory \u2014 `spin_lock(\u0026tcon-\u003etc_lock)` plus `tcon-\u003eneed_reconnect = true` \u2014 on an object the remote attacker selects via the controlled TreeId, giving a heap-spray-able corruption primitive leveragable for control-flow hijack.\nA:H - Dereferencing the poisoned/freed session and tcon produces a general protection fault or KASAN oops in the cifsd kernel thread (as shown in the sibling fix\u0027s trace), crashing or hanging the client with the mount unusable."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:30:26.161Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f9414004798d9742c1af23a1d839fe6a9503751c"
        },
        {
          "url": "https://git.kernel.org/stable/c/aa582b33f94453fdeaff1e7d0aa252c505975e01"
        },
        {
          "url": "https://git.kernel.org/stable/c/d919b6ea15ffa56fbafef4a1d92f47aeda9af645"
        },
        {
          "url": "https://git.kernel.org/stable/c/63981561ffd2d4987807df4126f96a11e18b0c1d"
        }
      ],
      "title": "smb: client: fix potential UAF in smb2_is_network_name_deleted()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-35862",
    "datePublished": "2024-05-19T08:34:21.173Z",
    "dateReserved": "2024-05-17T13:50:33.107Z",
    "dateUpdated": "2026-08-05T11:30:26.161Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f9414004798d9742c1af23a1d839fe6a9503751c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/aa582b33f94453fdeaff1e7d0aa252c505975e01\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/d919b6ea15ffa56fbafef4a1d92f47aeda9af645\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/63981561ffd2d4987807df4126f96a11e18b0c1d\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:21:48.581Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-35862\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:41:27.598442Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:15.938Z\"}}], \"cna\": {\"title\": \"smb: client: fix potential UAF in smb2_is_network_name_deleted()\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:N - The vulnerable function is invoked by the CIFS demultiplex thread on every SMB2 response received over TCP/445, keyed entirely on server-supplied fields (`Status` and `Id.SyncId.TreeId`). A malicious SMB server, or an off-path/MITM attacker injecting into an unsigned SMB connection, triggers it purely with network data.\\nAC:L - The remote peer controls both sides of the race: it forces the session teardown (failed reconnect/session setup drives `__cifs_put_smb_ses()`), and it holds the SES_EXITING window open for the full request timeout simply by not answering the SMB2 LOGOFF, while flooding STATUS_NETWORK_NAME_DELETED responses. The attempt is freely repeatable with no attacker-uncontrollable precondition.\\nPR:N - The attacker is the remote SMB peer and needs no credentials or privileges on the target Linux client; the code path runs in the kernel demux thread before any signature validation of the response.\\nUI:N - The attack works against an already-established mount \\u2014 an fstab/autofs/systemd-automount or DFS-referral connection, or a file server compromised or MITM\u0027d after mount \\u2014 and the server itself induces the session teardown, so no victim action is required.\\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\\nC:H - Use-after-free on `cifs_tcon`/`cifs_ses` gives an attacker-influenced read of freed slab contents, and `pr_warn_once(\\\"%s\\\", tcon-\u003etree_name)` walks freed heap memory into the kernel log, leaking whatever now occupies that object.\\nI:H - The path writes into freed memory \\u2014 `spin_lock(\u0026tcon-\u003etc_lock)` plus `tcon-\u003eneed_reconnect = true` \\u2014 on an object the remote attacker selects via the controlled TreeId, giving a heap-spray-able corruption primitive leveragable for control-flow hijack.\\nA:H - Dereferencing the poisoned/freed session and tcon produces a general protection fault or KASAN oops in the cifsd kernel thread (as shown in the sibling fix\u0027s trace), crashing or hanging the client with the mount unusable.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"9e550b085206544bd03a8b1dd58a5414e9508351\", \"lessThan\": \"f9414004798d9742c1af23a1d839fe6a9503751c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9e550b085206544bd03a8b1dd58a5414e9508351\", \"lessThan\": \"aa582b33f94453fdeaff1e7d0aa252c505975e01\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9e550b085206544bd03a8b1dd58a5414e9508351\", \"lessThan\": \"d919b6ea15ffa56fbafef4a1d92f47aeda9af645\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"9e550b085206544bd03a8b1dd58a5414e9508351\", \"lessThan\": \"63981561ffd2d4987807df4126f96a11e18b0c1d\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/client/smb2ops.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.85\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.26\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/client/smb2ops.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f9414004798d9742c1af23a1d839fe6a9503751c\"}, {\"url\": \"https://git.kernel.org/stable/c/aa582b33f94453fdeaff1e7d0aa252c505975e01\"}, {\"url\": \"https://git.kernel.org/stable/c/d919b6ea15ffa56fbafef4a1d92f47aeda9af645\"}, {\"url\": \"https://git.kernel.org/stable/c/63981561ffd2d4987807df4126f96a11e18b0c1d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix potential UAF in smb2_is_network_name_deleted()\\n\\nSkip sessions that are being teared down (status == SES_EXITING) to\\navoid UAF.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.85\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.26\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.5\", \"versionStartIncluding\": \"5.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:30:26.161Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-35862\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:30:26.161Z\", \"dateReserved\": \"2024-05-17T13:50:33.107Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-19T08:34:21.173Z\", \"assignerShortName\": \"Linux\"}",
      "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.