CVE-2026-93210 (GCVE-0-2026-93210)

Vulnerability from cvelistv5 – Published: 2026-09-24 15:10 – Updated: 2026-09-25 12:42
VLAI
Title
smb: client: harden DFS cache against invalid target hints
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: harden DFS cache against invalid target hints Currently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce->tgthint is NULL, and dfs_cache_noreq_update_tgthint() assumes ce->tgthint is always valid. In preparation for clearing ce->tgthint in free_tgts(), harden callers of get_tgt_name() against ERR_PTR results and harden dfs_cache_noreq_update_tgthint() against NULL pointer dereferences.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < a48328afbc3f63e3b9de8827e2e16c15b17976f7 (git)
Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < 6cb7f9fed8f40f28fbd464ca99c946951afc0952 (git)
Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < 66dbcdbb0cadffd12eb8f2b115fd57d384c5109d (git)
Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < 846f0709559b9e27024e126a80bc7afb76516912 (git)
Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < 7e32da6047d9afdae8dd17b87b4c8d97363c4ee2 (git)
Affected: 54be1f6c1c37498bba557049df646cc239fa37e3 , < bf86c08123c6ab8c61cc0be1dad7540db93738ff (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.0
Unaffected: 0 , < 5.0 (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/dfs_cache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a48328afbc3f63e3b9de8827e2e16c15b17976f7",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            },
            {
              "lessThan": "6cb7f9fed8f40f28fbd464ca99c946951afc0952",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            },
            {
              "lessThan": "66dbcdbb0cadffd12eb8f2b115fd57d384c5109d",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            },
            {
              "lessThan": "846f0709559b9e27024e126a80bc7afb76516912",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            },
            {
              "lessThan": "7e32da6047d9afdae8dd17b87b4c8d97363c4ee2",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            },
            {
              "lessThan": "bf86c08123c6ab8c61cc0be1dad7540db93738ff",
              "status": "affected",
              "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/dfs_cache.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": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.50",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.109",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "5.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: harden DFS cache against invalid target hints\n\nCurrently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce-\u003etgthint is\nNULL, and dfs_cache_noreq_update_tgthint() assumes ce-\u003etgthint is always\nvalid.\n\nIn preparation for clearing ce-\u003etgthint in free_tgts(), harden callers\nof get_tgt_name() against ERR_PTR results and harden\ndfs_cache_noreq_update_tgthint() against NULL pointer dereferences."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T12:42:37.060Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a48328afbc3f63e3b9de8827e2e16c15b17976f7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cb7f9fed8f40f28fbd464ca99c946951afc0952"
        },
        {
          "url": "https://git.kernel.org/stable/c/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d"
        },
        {
          "url": "https://git.kernel.org/stable/c/846f0709559b9e27024e126a80bc7afb76516912"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf86c08123c6ab8c61cc0be1dad7540db93738ff"
        }
      ],
      "title": "smb: client: harden DFS cache against invalid target hints",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93210",
    "datePublished": "2026-09-24T15:10:33.577Z",
    "dateReserved": "2026-09-17T16:02:15.093Z",
    "dateUpdated": "2026-09-25T12:42:37.060Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-93210",
      "date": "2026-09-27",
      "epss": "0.00172",
      "percentile": "0.05934"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/smb/client/dfs_cache.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "a48328afbc3f63e3b9de8827e2e16c15b17976f7",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6cb7f9fed8f40f28fbd464ca99c946951afc0952",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "66dbcdbb0cadffd12eb8f2b115fd57d384c5109d",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "846f0709559b9e27024e126a80bc7afb76516912",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7e32da6047d9afdae8dd17b87b4c8d97363c4ee2",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "bf86c08123c6ab8c61cc0be1dad7540db93738ff",
                    "status": "affected",
                    "version": "54be1f6c1c37498bba557049df646cc239fa37e3",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "fs/smb/client/dfs_cache.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": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.188",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.157",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.109",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.50",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.4",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc1",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: harden DFS cache against invalid target hints\n\nCurrently, get_tgt_name() returns ERR_PTR(-ENOENT) when ce-\u003etgthint is\nNULL, and dfs_cache_noreq_update_tgthint() assumes ce-\u003etgthint is always\nvalid.\n\nIn preparation for clearing ce-\u003etgthint in free_tgts(), harden callers\nof get_tgt_name() against ERR_PTR results and harden\ndfs_cache_noreq_update_tgthint() against NULL pointer dereferences."
          }
        ],
        "id": "CVE-2026-93210",
        "lastModified": "2026-09-25T13:17:17.670",
        "metrics": {},
        "published": "2026-09-24T16:17:15.877",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6cb7f9fed8f40f28fbd464ca99c946951afc0952"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/846f0709559b9e27024e126a80bc7afb76516912"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a48328afbc3f63e3b9de8827e2e16c15b17976f7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bf86c08123c6ab8c61cc0be1dad7540db93738ff"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-25T23:50:52Z",
      "cve": "CVE-2026-93210",
      "id": "CVE-2026-93210",
      "initial_release_date": "2026-09-24T23:50:04Z",
      "product_status:known_affected": "204",
      "product_status:known_not_affected": "143",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93210",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93210.json",
      "version": "3"
    }
  }
}



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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.