CVE-2026-23044

Estado: AplazadaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

PM: hibernate: Fix crash when freeing invalid crypto compressor

When crypto_alloc_acomp() fails, it returns an ERR_PTR value, not NULL.

The cleanup code in save_compressed_image() and load_compressed_image() unconditionally calls crypto_free_acomp() without checking for ERR_PTR, which causes crypto_acomp_tfm() to dereference an invalid pointer and crash the kernel.

This can be triggered when the compression algorithm is unavailable (e.g., CONFIG_CRYPTO_LZO not enabled).

Fix by adding IS_ERR_OR_NULL() checks before calling crypto_free_acomp() and acomp_request_free(), similar to the existing kthread_stop() check.

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[ rjw: Added 2 empty code lines ]

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.17%
Percentil entre todas las CVEs puntuadas: 6
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-23044",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab",
              "lessThan": "b7a883b0135dbc6817e90a829421c9fc8cd94bad",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab",
              "lessThan": "7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/power/swap.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/power/swap.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-02-04T16:16:19.897",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPM: hibernate: Fix crash when freeing invalid crypto compressor\n\nWhen crypto_alloc_acomp() fails, it returns an ERR_PTR value, not NULL.\n\nThe cleanup code in save_compressed_image() and load_compressed_image()\nunconditionally calls crypto_free_acomp() without checking for ERR_PTR,\nwhich causes crypto_acomp_tfm() to dereference an invalid pointer and\ncrash the kernel.\n\nThis can be triggered when the compression algorithm is unavailable\n(e.g., CONFIG_CRYPTO_LZO not enabled).\n\nFix by adding IS_ERR_OR_NULL() checks before calling crypto_free_acomp()\nand acomp_request_free(), similar to the existing kthread_stop() check.\n\n[ rjw: Added 2 empty code lines ]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPM: hibernate: Corrige un fallo al liberar un compresor criptográfico no válido\n\nCuando crypto_alloc_acomp() falla, devuelve un valor ERR_PTR, no NULL.\n\nEl código de limpieza en save_compressed_image() y load_compressed_image() llama incondicionalmente a crypto_free_acomp() sin comprobar si hay ERR_PTR, lo que provoca que crypto_acomp_tfm() desreferencie un puntero no válido y provoque un fallo en el kernel.\n\nEsto puede activarse cuando el algoritmo de compresión no está disponible (p. ej., CONFIG_CRYPTO_LZO no habilitado).\n\nSolución añadiendo comprobaciones IS_ERR_OR_NULL() antes de llamar a crypto_free_acomp() y acomp_request_free(), similar a la comprobación kthread_stop() existente.\n\n[ rjw: Added 2 empty code lines ]"
    }
  ],
  "lastModified": "2026-06-17T10:20:45.903",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}