CVE-2026-64598 (GCVE-0-2026-64598)

Vulnerability from cvelistv5 – Published: 2026-08-06 07:13 – Updated: 2026-08-06 07:13
VLAI
Title
smb/client: Fix error code in smb2_aead_req_alloc()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb/client: Fix error code in smb2_aead_req_alloc() The "*num_sgs" variable is a u32 so "ERR_PTR(*num_sgs)" doesn't work. We would have to do something similar to the previous line where it's cast to int and then long. However, it's simpler to store the return in an int ret variable. This bug would eventually result in a crash when dereference the invalid error pointer.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d08089f649a0cfb2099c8551ac47eef0cc23fdf2 , < aa37f5fef78dd11cbf983269da2031e12625c56d (git)
Affected: d08089f649a0cfb2099c8551ac47eef0cc23fdf2 , < cad756733dc3985188983f3e2eb77e2927209099 (git)
Affected: d08089f649a0cfb2099c8551ac47eef0cc23fdf2 , < a187883cc1dc784a4d32537f5d316f1b7b9ad76f (git)
Affected: d08089f649a0cfb2099c8551ac47eef0cc23fdf2 , < a1cc432cb0b0a1f74f98a0db3b94ca880c7947ac (git)
Affected: d08089f649a0cfb2099c8551ac47eef0cc23fdf2 , < 61f28012e5650c619223decdb7970e0d3162e949 (git)
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Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smb2ops.c"
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      "cpeApplicability": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: Fix error code in smb2_aead_req_alloc()\n\nThe \"*num_sgs\" variable is a u32 so \"ERR_PTR(*num_sgs)\" doesn\u0027t work.\nWe would have to do something similar to the previous line where it\u0027s\ncast to int and then long.  However, it\u0027s simpler to store the return in\nan int ret variable.\n\nThis bug would eventually result in a crash when dereference the invalid\nerror pointer."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-06T07:13:52.716Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/aa37f5fef78dd11cbf983269da2031e12625c56d"
        },
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          "url": "https://git.kernel.org/stable/c/cad756733dc3985188983f3e2eb77e2927209099"
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        },
        {
          "url": "https://git.kernel.org/stable/c/61f28012e5650c619223decdb7970e0d3162e949"
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      ],
      "title": "smb/client: Fix error code in smb2_aead_req_alloc()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64598",
    "datePublished": "2026-08-06T07:13:52.716Z",
    "dateReserved": "2026-07-19T15:36:31.799Z",
    "dateUpdated": "2026-08-06T07:13:52.716Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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  }
}



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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

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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.


Detection rules are retrieved from Rulezet.