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CVE-2026-53076 (GCVE-0-2026-53076)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-08-05 12:33
VLAI
Title
bpf: Fix OOB in pcpu_init_value
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix OOB in pcpu_init_value An out-of-bounds read occurs when copying element from a BPF_MAP_TYPE_CGROUP_STORAGE map to another pcpu map with the same value_size that is not rounded up to 8 bytes. The issue happens when: 1. A CGROUP_STORAGE map is created with value_size not aligned to 8 bytes (e.g., 4 bytes) 2. A pcpu map is created with the same value_size (e.g., 4 bytes) 3. Update element in 2 with data in 1 pcpu_init_value assumes that all sources are rounded up to 8 bytes, and invokes copy_map_value_long to make a data copy, However, the assumption doesn't stand since there are some cases where the source may not be rounded up to 8 bytes, e.g., CGROUP_STORAGE, skb->data. the verifier verifies exactly the size that the source claims, not the size rounded up to 8 bytes by kernel, an OOB happens when the source has only 4 bytes while the copy size(4) is rounded up to 8.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d3bec0138bfbe58606fc1d6f57a4cdc1a20218db , < e19c5ed9f1922a6854073f8651a63fa7be26e9e9 (git)
Affected: d3bec0138bfbe58606fc1d6f57a4cdc1a20218db , < e0378419b0e20178b5d100b27c9cc7e51064202e (git)
Affected: d3bec0138bfbe58606fc1d6f57a4cdc1a20218db , < 6086079e6d1c32ba4c4b422612b8aebb1129a96c (git)
Affected: d3bec0138bfbe58606fc1d6f57a4cdc1a20218db , < 634a793d0e1c822412095d25a1338f8831ad894c (git)
Affected: d3bec0138bfbe58606fc1d6f57a4cdc1a20218db , < 576afddfee8d1108ee299bf10f581593540d1a36 (git)
Affected: c602ad2b52dcbca5af08e5137bd5575c039b52e3 (git)
Affected: ab68b940dd6f7b5f8e2557937162dcb8a0583a05 (git)
Affected: 5.4.78 , < 5.5 (semver)
Affected: 5.9.9 , < 5.10 (semver)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (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)
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      "product_status:known_affected": "731",
      "product_status:known_not_affected": "34",
      "product_status:recommended": "42",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53076",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53076.json",
      "version": "8"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.