Vulnerability-Lookup

GHSA-FMHV-7W67-R8MW

Vulnerability from github – Published: 2026-02-04 18:30 – Updated: 2026-02-04 18:30

Details

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 ]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23044"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-04T16:16:19Z",
    "severity": null
  },
  "details": "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 ]",
  "id": "GHSA-fmhv-7w67-r8mw",
  "modified": "2026-02-04T18:30:41Z",
  "published": "2026-02-04T18:30:41Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23044"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-02-09 08:37

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/b7a883b0135dbc681…
	https://git.kernel.org/stable/c/7966cf0ebe32c981b…

Impacted products

Vendor

Product

Version

Linux

Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < b7a883b0135dbc6817e90a829421c9fc8cd94bad (git)
Affected: b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab , < 7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77 (git)

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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/swap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b7a883b0135dbc6817e90a829421c9fc8cd94bad",
              "status": "affected",
              "version": "b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab",
              "versionType": "git"
            },
            {
              "lessThan": "7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77",
              "status": "affected",
              "version": "b03d542c3c9569f549b1ba0cf7f4d90151fbf8ab",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/power/swap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "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": "6.18.6",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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 ]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:37:39.286Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b7a883b0135dbc6817e90a829421c9fc8cd94bad"
        },
        {
          "url": "https://git.kernel.org/stable/c/7966cf0ebe32c981bfa3db252cb5fc3bb1bf2e77"
        }
      ],
      "title": "PM: hibernate: Fix crash when freeing invalid crypto compressor",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23044",
    "datePublished": "2026-02-04T16:00:27.153Z",
    "dateReserved": "2026-01-13T15:37:45.944Z",
    "dateUpdated": "2026-02-09T08:37:39.286Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-FMHV-7W67-R8MW

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

Tags

Sightings

Nomenclature