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

Vulnerability from cvelistv5 – Published: 2026-05-27 09:24 – Updated: 2026-06-14 17:46
VLAI
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
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 0f3d9dd5e1fd52b39e25328307c6a694e994ffe3 (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 26d3339e465e54107bd85884341d1609c5300d6a (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6 (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < b4b5a20bed82130da2f2818f04d52378952fbd0b (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 85a2f30e40f7468db732f55659bc6318874f49af (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 32ce55d424395904986f5066f8755f6cb9993377 (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < fc39753b7f92e09177777e9c648afe5aa3abb81f (git)
Affected: de9cbbaadba5adf88a19e46df61f7054000838f6 , < 5828b9e5b272ecff7cf5d345128d3de7324117f7 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 5.10.258 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
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      "cve": "CVE-2026-45838",
      "id": "CVE-2026-45838",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: bpf: fix end-of-list detection in cgroup_storage_get_next_key()",
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      "cve": "CVE-2026-45838",
      "id": "CVE-2026-45838",
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      "product_status:first_fixed": "2",
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      "product_status:recommended": "254",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45838",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45838.json",
      "version": "14"
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}



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  • 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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.