Vulnerability-Lookup

FKIE_CVE-2026-64208

Vulnerability from fkie_nvd - Published: 2026-07-24 16:16 - Updated: 2026-08-12 00:19

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks Change the krb5 crypto library to provide facilities to precheck the length of the message about to be decrypted or verified. Fix AF_RXRPC to make use of this to validate DATA packets secured with RxGK.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2b50aceafe6606ea52ed42aadd1b4d44a188aade	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9217017f4bce53dddb8d547837f1f707045d64ad	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "Documentation/crypto/krb5.rst",
            "crypto/krb5/krb5_api.c",
            "include/crypto/krb5.h",
            "include/trace/events/rxrpc.h",
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            },
            {
              "lessThan": "9217017f4bce53dddb8d547837f1f707045d64ad",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            },
            {
              "lessThan": "2b50aceafe6606ea52ed42aadd1b4d44a188aade",
              "status": "affected",
              "version": "9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "Documentation/crypto/krb5.rst",
            "crypto/krb5/krb5_api.c",
            "include/crypto/krb5.h",
            "include/trace/events/rxrpc.h",
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.34",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2437F48D-051C-4E78-83C2-F198D0F2AE92",
              "versionEndExcluding": "6.18.34",
              "versionStartIncluding": "6.16",
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            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks\n\nChange the krb5 crypto library to provide facilities to precheck the length\nof the message about to be decrypted or verified.\n\nFix AF_RXRPC to make use of this to validate DATA packets secured with\nRxGK."
    }
  ],
  "id": "CVE-2026-64208",
  "lastModified": "2026-08-12T00:19:51.840",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-07-24T16:16:48.420",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2b50aceafe6606ea52ed42aadd1b4d44a188aade"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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    },
    {
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      "tags": [
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-64208 (GCVE-0-2026-64208)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-08-05 12:40

Title

crypto/krb5, rxrpc: Fix lack of pre-decrypt/pre-verify length checks

Summary

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/585f9f6aef5c4542a…
https://git.kernel.org/stable/c/9217017f4bce53ddd…
https://git.kernel.org/stable/c/2b50aceafe6606ea5…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff (git) Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 9217017f4bce53dddb8d547837f1f707045d64ad (git) Affected: 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a , < 2b50aceafe6606ea52ed42aadd1b4d44a188aade (git)
Linux	Linux	Affected: 6.16 Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "Documentation/crypto/krb5.rst",
            "crypto/krb5/krb5_api.c",
            "include/crypto/krb5.h",
            "include/trace/events/rxrpc.h",
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "585f9f6aef5c4542ac9d6ec45cd7dbc7df9af3ff",
              "status": "affected",
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              "versionType": "git"
            },
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              "versionType": "git"
            }
          ]
        },
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          "product": "Linux",
          "programFiles": [
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            "crypto/krb5/krb5_api.c",
            "include/crypto/krb5.h",
            "include/trace/events/rxrpc.h",
            "net/rxrpc/rxgk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
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              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

FKIE_CVE-2026-64208

CVE-2026-64208 (GCVE-0-2026-64208)

Tags

Sightings

Nomenclature