FKIE_CVE-2026-93210

Vulnerability from fkie_nvd - Published: 2026-09-24 16:17 - Updated: 2026-09-25 13:17
Severity
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66dbcdbb0cadffd12eb8f2b115fd57d384c5109d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cb7f9fed8f40f28fbd464ca99c946951afc0952
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e32da6047d9afdae8dd17b87b4c8d97363c4ee2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/846f0709559b9e27024e126a80bc7afb76516912
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a48328afbc3f63e3b9de8827e2e16c15b17976f7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bf86c08123c6ab8c61cc0be1dad7540db93738ff
Impacted products
Vendor Product Version
To clipboard 

{
  "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"
}



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.