CVE-2026-53216 (GCVE-0-2026-53216)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-06-28 06:40
VLAI
Title
net: mvpp2: limit XDP frame size to the RX buffer
Summary
In the Linux kernel, the following vulnerability has been resolved: net: mvpp2: limit XDP frame size to the RX buffer mvpp2 has short and long BM pools, and short pool buffers can be smaller than PAGE_SIZE. The XDP path nevertheless initializes every xdp_buff with PAGE_SIZE as frame size. XDP helpers use frame_sz to validate tail growth and to derive the hard end of the data area. Advertising PAGE_SIZE for short buffers can let bpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting memory or later tripping skb tailroom checks. Initialize the XDP buffer with bm_pool->frag_size so XDP tailroom matches the actual buffer backing the packet.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < a3ee9231ccec6ec3be2de89c56f897055fd9eab1 (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < ec8e1e5842bc0dbd4c272761f4db3651eecd0339 (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < 3b8b0c3631b19faee53f0d15a49924129b063eec (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < 994bd2b58d2bd08aa97ec0836cc813cfcb00d749 (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < 910617a4e67dbdd5fdb39d9dc6a51e491e1b2c3e (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < 9545cc5ef18ca22d031f2f47c157192460652359 (git)
Affected: 07dd0a7aae7f72af7cec18909581c2bb570edddc , < f3c6aa078927e6fe8121c9c591ddee8716c5305a (git)
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Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Advertising PAGE_SIZE for short buffers can let\\nbpf_xdp_adjust_tail() grow a packet past the real allocation, corrupting\\nmemory or later tripping skb tailroom checks.\\n\\nInitialize the XDP buffer with bm_pool-\u003efrag_size so XDP tailroom matches\\nthe actual buffer backing the 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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.

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  • 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.
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