Vulnerability-Lookup

GHSA-X78H-GF69-P5J6

Vulnerability from github – Published: 2026-05-27 12:31 – Updated: 2026-05-27 12:31

Details

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

bpf: fix end-of-list detection in cgroup_storage_get_next_key()

list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace.

Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-45838"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-27T11:16:23Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix end-of-list detection in cgroup_storage_get_next_key()\n\nlist_next_entry() never returns NULL -- when the current element is the\nlast entry it wraps to the list head via container_of(). The subsequent\nNULL check is therefore dead code and get_next_key() never returns\n-ENOENT for the last element, instead reading storage-\u003ekey from a bogus\npointer that aliases internal map fields and copying the result to\nuserspace.\n\nReplace it with list_entry_is_head() so the function correctly returns\n-ENOENT when there are no more entries.",
  "id": "GHSA-x78h-gf69-p5j6",
  "modified": "2026-05-27T12:31:23Z",
  "published": "2026-05-27T12:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45838"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-45838 (GCVE-0-2026-45838)

Vulnerability from cvelistv5 – Published: 2026-05-27 09:24 – Updated: 2026-05-27 09:24

Title

bpf: fix end-of-list detection in cgroup_storage_get_next_key()

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/b4b5a20bed82130da…
https://git.kernel.org/stable/c/85a2f30e40f7468db…
https://git.kernel.org/stable/c/32ce55d4243959049…
https://git.kernel.org/stable/c/fc39753b7f92e0917…
https://git.kernel.org/stable/c/5828b9e5b272ecff7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < b4b5a20bed82130da2f2818f04d52378952fbd0b (git) Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 85a2f30e40f7468db732f55659bc6318874f49af (git) Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 32ce55d424395904986f5066f8755f6cb9993377 (git) Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < fc39753b7f92e09177777e9c648afe5aa3abb81f (git) Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 5828b9e5b272ecff7cf5d345128d3de7324117f7 (git)
Linux	Linux	Affected: 4.19 Unaffected: 0 , < 4.19 (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/local_storage.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "85a2f30e40f7468db732f55659bc6318874f49af",
              "status": "affected",
              "version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "5828b9e5b272ecff7cf5d345128d3de7324117f7",
              "status": "affected",
              "version": "de9cbbaadba5adf88a19e46df61f7054000838f6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.19",
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                },
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                },
                {
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix end-of-list detection in cgroup_storage_get_next_key()\n\nlist_next_entry() never returns NULL -- when the current element is the\nlast entry it wraps to the list head via container_of(). The subsequent\nNULL check is therefore dead code and get_next_key() never returns\n-ENOENT for the last element, instead reading storage-\u003ekey from a bogus\npointer that aliases internal map fields and copying the result to\nuserspace.\n\nReplace it with list_entry_is_head() so the function correctly returns\n-ENOENT when there are no more entries."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T09:24:36.561Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7"
        }
      ],
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    }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45838",
    "datePublished": "2026-05-27T09:24:36.561Z",
    "dateReserved": "2026-05-13T15:03:33.077Z",
    "dateUpdated": "2026-05-27T09:24:36.561Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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-X78H-GF69-P5J6

CVE-2026-45838 (GCVE-0-2026-45838)

Tags

Sightings

Nomenclature