CVE-2025-68726 (GCVE-0-2025-68726)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:33 – Updated: 2026-08-05 12:11
VLAI
Title
crypto: aead - Fix reqsize handling
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: aead - Fix reqsize handling Commit afddce13ce81d ("crypto: api - Add reqsize to crypto_alg") introduced cra_reqsize field in crypto_alg struct to replace type specific reqsize fields. It looks like this was introduced specifically for ahash and acomp from the commit description as subsequent commits add necessary changes in these alg frameworks. However, this is being recommended for use in all crypto algs instead of setting reqsize using crypto_*_set_reqsize(). Using cra_reqsize in aead algorithms, hence, causes memory corruptions and crashes as the underlying functions in the algorithm framework have not been updated to set the reqsize properly from cra_reqsize. [1] Add proper set_reqsize calls in the aead init function to properly initialize reqsize for these algorithms in the framework. [1]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7064 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: afddce13ce81d52a13898fa0700917835c71acd6 , < 64377e66e187164bd6737112d07257f5f0feb681 (git)
Affected: afddce13ce81d52a13898fa0700917835c71acd6 , < 12b413f5460c393d1151a37f591140693eca0f84 (git)
Affected: afddce13ce81d52a13898fa0700917835c71acd6 , < 9b04d8f00569573796dd05397f5779135593eb24 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (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": [
            "crypto/aead.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "64377e66e187164bd6737112d07257f5f0feb681",
              "status": "affected",
              "version": "afddce13ce81d52a13898fa0700917835c71acd6",
              "versionType": "git"
            },
            {
              "lessThan": "12b413f5460c393d1151a37f591140693eca0f84",
              "status": "affected",
              "version": "afddce13ce81d52a13898fa0700917835c71acd6",
              "versionType": "git"
            },
            {
              "lessThan": "9b04d8f00569573796dd05397f5779135593eb24",
              "status": "affected",
              "version": "afddce13ce81d52a13898fa0700917835c71acd6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "crypto/aead.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": "6.17.*",
              "status": "unaffected",
              "version": "6.17.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.13",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: aead - Fix reqsize handling\n\nCommit afddce13ce81d (\"crypto: api - Add reqsize to crypto_alg\")\nintroduced cra_reqsize field in crypto_alg struct to replace type\nspecific reqsize fields. It looks like this was introduced specifically\nfor ahash and acomp from the commit description as subsequent commits\nadd necessary changes in these alg frameworks.\n\nHowever, this is being recommended for use in all crypto algs\ninstead of setting reqsize using crypto_*_set_reqsize(). Using\ncra_reqsize in aead algorithms, hence, causes memory corruptions and\ncrashes as the underlying functions in the algorithm framework have not\nbeen updated to set the reqsize properly from cra_reqsize. [1]\n\nAdd proper set_reqsize calls in the aead init function to properly\ninitialize reqsize for these algorithms in the framework.\n\n[1]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b"
        }
      ],
      "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 - A remote peer can cause a kTLS-enabled server using an affected AEAD implementation to decrypt received TLS records, reaching the vulnerable crypto path through normal TCP processing.\nAC:L - Every request is underallocated and the implementation immediately overwrites caller-owned state; no race or condition outside the attacker\u0027s control is required.\nPR:N - A remote peer can establish an ordinary TLS session and submit records without kernel capabilities, local credentials, or an authenticated application session.\nUI:N - The server processes the attacker\u0027s TLS records without requiring any victim action.\nS:U - Exploitation compromises the host kernel but does not inherently cross a separate virtualization, IOMMU, or other security authority.\nC:H - The overwrite corrupts kernel pointers and scatterlist state, providing memory-corruption primitives capable of redirecting reads and exposing arbitrary kernel memory.\nI:H - The undersized context overwrites pointer-bearing adjacent structures, making arbitrary writes, control-flow hijacking, and kernel code execution defensible outcomes.\nA:H - Corruption of socket, completion, and scatterlist state can cause a kernel oops or panic, and an attacker can trigger it repeatedly."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:11:09.299Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/64377e66e187164bd6737112d07257f5f0feb681"
        },
        {
          "url": "https://git.kernel.org/stable/c/12b413f5460c393d1151a37f591140693eca0f84"
        },
        {
          "url": "https://git.kernel.org/stable/c/9b04d8f00569573796dd05397f5779135593eb24"
        }
      ],
      "title": "crypto: aead - Fix reqsize handling",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68726",
    "datePublished": "2025-12-24T10:33:10.364Z",
    "dateReserved": "2025-12-24T10:30:51.027Z",
    "dateUpdated": "2026-08-05T12:11:09.299Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68726",
      "date": "2026-10-27",
      "epss": "0.00413",
      "percentile": "0.35332"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "crypto/aead.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "64377e66e187164bd6737112d07257f5f0feb681",
                    "status": "affected",
                    "version": "afddce13ce81d52a13898fa0700917835c71acd6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "12b413f5460c393d1151a37f591140693eca0f84",
                    "status": "affected",
                    "version": "afddce13ce81d52a13898fa0700917835c71acd6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9b04d8f00569573796dd05397f5779135593eb24",
                    "status": "affected",
                    "version": "afddce13ce81d52a13898fa0700917835c71acd6",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "crypto/aead.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": "6.17.*",
                    "status": "unaffected",
                    "version": "6.17.13",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.2",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.19",
                    "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\ncrypto: aead - Fix reqsize handling\n\nCommit afddce13ce81d (\"crypto: api - Add reqsize to crypto_alg\")\nintroduced cra_reqsize field in crypto_alg struct to replace type\nspecific reqsize fields. It looks like this was introduced specifically\nfor ahash and acomp from the commit description as subsequent commits\nadd necessary changes in these alg frameworks.\n\nHowever, this is being recommended for use in all crypto algs\ninstead of setting reqsize using crypto_*_set_reqsize(). Using\ncra_reqsize in aead algorithms, hence, causes memory corruptions and\ncrashes as the underlying functions in the algorithm framework have not\nbeen updated to set the reqsize properly from cra_reqsize. [1]\n\nAdd proper set_reqsize calls in the aead init function to properly\ninitialize reqsize for these algorithms in the framework.\n\n[1]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncrypto: aead - Correcci\u00f3n del manejo de reqsize\n\nEl commit afddce13ce81d (\u0027crypto: api - A\u00f1adir reqsize a crypto_alg\u0027) introdujo el campo cra_reqsize en la estructura crypto_alg para reemplazar los campos reqsize espec\u00edficos del tipo. Parece que esto se introdujo espec\u00edficamente para ahash y acomp seg\u00fan la descripci\u00f3n del commit, ya que los commits posteriores a\u00f1aden los cambios necesarios en estos frameworks de algoritmos.\n\nSin embargo, se est\u00e1 recomendando su uso en todos los algoritmos criptogr\u00e1ficos en lugar de establecer reqsize usando crypto_*_set_reqsize(). El uso de cra_reqsize en algoritmos aead, por lo tanto, causa corrupciones de memoria y fallos, ya que las funciones subyacentes en el framework del algoritmo no se han actualizado para establecer reqsize correctamente desde cra_reqsize. [1]\n\nA\u00f1adir llamadas set_reqsize adecuadas en la funci\u00f3n de inicializaci\u00f3n de aead para inicializar correctamente reqsize para estos algoritmos en el framework.\n\n[1]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b"
          }
        ],
        "id": "CVE-2025-68726",
        "lastModified": "2026-10-13T11:10:00.203",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2025-12-24T11:16:01.900",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/12b413f5460c393d1151a37f591140693eca0f84"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/64377e66e187164bd6737112d07257f5f0feb681"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9b04d8f00569573796dd05397f5779135593eb24"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-13T17:35:54+00:00",
      "cve": "CVE-2025-68726",
      "id": "CVE-2025-68726",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Arbitrary code execution and denial of service in crypto:aead",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68726.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T16:49:23Z",
      "cve": "CVE-2025-68726",
      "id": "CVE-2025-68726",
      "initial_release_date": "2025-12-25T00:23:54Z",
      "product_status:known_not_affected": "560",
      "product_status:recommended": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68726",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68726.json",
      "version": "13"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.