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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-28 06:39
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
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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{
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  }
}


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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.