CVE-2026-23044 (GCVE-0-2026-23044)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-05-11 21:58
VLAI
Title
PM: hibernate: Fix crash when freeing invalid crypto compressor
Summary
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. [ rjw: Added 2 empty code lines ]
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < b7a883b0135dbc6817e90a829421c9fc8cd94bad (git)
Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < 7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77 (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:58:54.981Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad"
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          "url": "https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23044",
    "datePublished": "2026-02-04T16:00:27.153Z",
    "dateReserved": "2026-01-13T15:37:45.944Z",
    "dateUpdated": "2026-05-11T21:58:54.981Z",
    "state": "PUBLISHED"
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          {
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            "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 criptogr\u00e1fico no v\u00e1lido\n\nCuando crypto_alloc_acomp() falla, devuelve un valor ERR_PTR, no NULL.\n\nEl c\u00f3digo 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 v\u00e1lido y provoque un fallo en el kernel.\n\nEsto puede activarse cuando el algoritmo de compresi\u00f3n no est\u00e1 disponible (p. ej., CONFIG_CRYPTO_LZO no habilitado).\n\nSoluci\u00f3n a\u00f1adiendo comprobaciones IS_ERR_OR_NULL() antes de llamar a crypto_free_acomp() y acomp_request_free(), similar a la comprobaci\u00f3n kthread_stop() existente.\n\n[ rjw: Added 2 empty code lines ]"
          }
        ],
        "id": "CVE-2026-23044",
        "lastModified": "2026-06-17T10:20:45.903",
        "metrics": {},
        "published": "2026-02-04T16:16:19.897",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:33:07+00:00",
      "cve": "CVE-2026-23044",
      "id": "CVE-2026-23044",
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      "product_status:known_affected": "14",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: PM: hibernate: Fix crash when freeing invalid crypto compressor",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23044.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
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      "cve": "CVE-2026-23044",
      "id": "CVE-2026-23044",
      "initial_release_date": "2026-02-05T00:25:54Z",
      "product_status:known_not_affected": "261",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23044",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23044.json",
      "version": "6"
    }
  }
}



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