FKIE_CVE-2026-45876

Vulnerability from fkie_nvd - Published: 2026-05-27 14:17 - Updated: 2026-06-17 10:52
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: arm64/gcs: Fix error handling in arch_set_shadow_stack_status() alloc_gcs() returns an error-encoded pointer on failure, which comes from do_mmap(), not NULL. The current NULL check fails to detect errors, which could lead to using an invalid GCS address. Use IS_ERR_VALUE() to properly detect errors, consistent with the check in gcs_alloc_thread_stack().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffaf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/mm/gcs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c787a235deb33be6eda40beee8f561da5fd8cb8c",
              "status": "affected",
              "version": "b57180c75c7ebff6613886cb69ef6e283a10358b",
              "versionType": "git"
            },
            {
              "lessThan": "a4741114c9622346c4bbb8cc2bbd88153616ffaf",
              "status": "affected",
              "version": "b57180c75c7ebff6613886cb69ef6e283a10358b",
              "versionType": "git"
            },
            {
              "lessThan": "53c998527ffa60f9deda8974a11ad39790684159",
              "status": "affected",
              "version": "b57180c75c7ebff6613886cb69ef6e283a10358b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/mm/gcs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "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\narm64/gcs: Fix error handling in arch_set_shadow_stack_status()\n\nalloc_gcs() returns an error-encoded pointer on failure, which comes\nfrom do_mmap(), not NULL.\n\nThe current NULL check fails to detect errors, which could lead to using\nan invalid GCS address.\n\nUse IS_ERR_VALUE() to properly detect errors, consistent with the\ncheck in gcs_alloc_thread_stack()."
    }
  ],
  "id": "CVE-2026-45876",
  "lastModified": "2026-06-17T10:52:39.173",
  "metrics": {},
  "published": "2026-05-27T14:17:01.280",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffaf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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