fkie_cve-2024-26800
Vulnerability from fkie_nvd
Published
2024-04-04 09:15
Modified
2024-12-20 15:55
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8


To clipboard 

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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntls: fix use-after-free on failed backlog decryption\n\nWhen the decrypt request goes to the backlog and crypto_aead_decrypt\nreturns -EBUSY, tls_do_decryption will wait until all async\ndecryptions have completed. If one of them fails, tls_do_decryption\nwill return -EBADMSG and tls_decrypt_sg jumps to the error path,\nreleasing all the pages. But the pages have been passed to the async\ncallback, and have already been released by tls_decrypt_done.\n\nThe only true async case is when crypto_aead_decrypt returns\n -EINPROGRESS. With -EBUSY, we already waited so we can tell\ntls_sw_recvmsg that the data is available for immediate copy, but we\nneed to notify tls_decrypt_sg (via the new -\u003easync_done flag) that the\nmemory has already been released."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tls: corrige el use-after-free en el descifrado fallido del trabajo pendiente Cuando la solicitud de descifrado va al trabajo pendiente y crypto_aead_decrypt devuelve -EBUSY, tls_do_decryption esperar\u00e1 hasta que se hayan completado todos los descifrados as\u00edncronos. Si uno de ellos falla, tls_do_decryption devolver\u00e1 -EBADMSG y tls_decrypt_sg salta a la ruta del error, liberando todas las p\u00e1ginas. Pero las p\u00e1ginas se pasaron a la devoluci\u00f3n de llamada as\u00edncrona y tls_decrypt_done ya las public\u00f3. El \u00fanico caso as\u00edncrono verdadero es cuando crypto_aead_decrypt devuelve -EINPROGRESS. Con -EBUSY, ya esperamos para poder decirle a tls_sw_recvmsg que los datos est\u00e1n disponibles para copia inmediata, pero debemos notificar a tls_decrypt_sg (a trav\u00e9s del nuevo indicador -\u0026gt;async_done) que la memoria ya ha sido liberada."
    }
  ],
  "id": "CVE-2024-26800",
  "lastModified": "2024-12-20T15:55:10.150",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
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  "published": "2024-04-04T09:15:09.003",
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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