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Linux Kernel EUVDEUVD-2026-39307

| CVE-2026-53216 CRITICAL
2026-06-25 416baaa9-dc9f-4396-8d5f-8c081fb06d67 GHSA-8vc2-h54q-6258
Information Disclosure Linux Red Hat Suse
Critical
Disputed · 9.8 Vendor: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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Severity by source

Sources disagree (Medium–Critical)
Vendor (416baaa9-dc9f-4396-8d5f-8c081fb06d67) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.4 MEDIUM

Reachable only via a privileged XDP program (PR:H) under specific short-pool conditions on Marvell hardware (AC:H, AV:L); out-of-bounds write yields full memory-safety impact (C/I/A:H).

3.1 AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
6.7 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jun 28, 2026 - 09:35 vuln.today
CVSS changed
Jun 28, 2026 - 08:22 NVD
9.8 (CRITICAL)
Patch available
Jun 25, 2026 - 10:32 EUVD
CVE Published
Jun 25, 2026 - 09:16 cve.org
UNKNOWN (no severity yet)
CVE Published
Jun 25, 2026 - 09:16 cve.org
CRITICAL 9.8

DescriptionCVE.org

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.

AnalysisAI

Memory corruption in the Linux kernel's Marvell mvpp2 (PPv2) Ethernet driver allows the XDP fast-path to write past the real packet buffer on hardware using short BM pools. The driver hard-codes PAGE_SIZE as the XDP frame size even when short-pool buffers are smaller, so bpf_xdp_adjust_tail() can legitimately grow a frame beyond its actual allocation, corrupting adjacent memory or later tripping skb tailroom checks. EPSS is low (0.18%, 8th percentile) and there is no public exploit identified at time of analysis; despite the auto-assigned 9.8 CVSS, realistic exploitation is constrained to systems running an XDP program on affected Marvell hardware.

Technical ContextAI

The flaw lives in the mvpp2 driver for Marvell Armada/PPv2 networking SoCs, which maintains two buffer-manager (BM) pools: a 'long' pool sized at/around PAGE_SIZE and a 'short' pool whose buffers can be smaller than a page. When a frame is handed to the eBPF XDP hook, the driver initializes the xdp_buff with PAGE_SIZE as frame_sz regardless of which pool backed it. XDP tail-growth helpers such as bpf_xdp_adjust_tail() use frame_sz to compute the legal hard end of the data area, so for short-pool packets the kernel believes there is more tailroom than physically exists. The root cause is a buffer-length/size-validation error (no CWE assigned in the source data, but conceptually CWE-805/CWE-787 - buffer access using an incorrect length leading to out-of-bounds write). The fix initializes the XDP buffer with bm_pool->frag_size so advertised tailroom matches the actual backing allocation.

RemediationAI

Vendor-released patch: upgrade to a fixed Linux stable release - 7.1, 7.0.13, 6.18.36, 6.12.94, 6.6.143, 6.1.176, or 5.15.210, whichever matches your maintained series. The fix initializes the XDP buffer with bm_pool->frag_size; the stable commits are available at git.kernel.org (e.g. https://git.kernel.org/stable/c/3b8b0c3631b19faee53f0d15a49924129b063eec and the parallel backport hashes), with the tracking record at https://nvd.nist.gov/vuln/detail/CVE-2026-53216. If kernel patching must be deferred on affected Marvell hardware, the most direct compensating control is to not attach XDP programs that call bpf_xdp_adjust_tail()/grow the tail on mvpp2 interfaces - detaching XDP removes the trigger path entirely, at the cost of losing any XDP-based packet acceleration or filtering you rely on. Restricting CAP_NET_ADMIN/CAP_BPF so that untrusted users cannot load XDP programs further limits exposure, with the trade-off of constraining legitimate network management automation.

Same technique Information Disclosure

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.177 Container suse/sl-micro/6.1/base-os-container:2.2.1-5.155 Affected
Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.206 Container suse/sl-micro/6.1/rt-os-container:2.2.1-5.152 Affected
Image SLES15-SP7-Azure-3P Image SLES15-SP7-Azure-Basic Image SLES15-SP7-Azure-Standard Image SLES15-SP7-HPC-Azure Affected
Image SLES15-SP7-BYOS-Azure Image SLES15-SP7-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-Aliyun Image SLES15-SP7-CHOST-BYOS-Azure Image SLES15-SP7-CHOST-BYOS-EC2 Image SLES15-SP7-CHOST-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-GDC Image SLES15-SP7-CHOST-BYOS-SAP-CCloud Image SLES15-SP7-EC2 Image SLES15-SP7-EC2-ECS-HVM Image SLES15-SP7-GCE Image SLES15-SP7-HPC-BYOS-Azure Image SLES15-SP7-HPC-BYOS-EC2 Image SLES15-SP7-HPC-BYOS-GCE Image SLES15-SP7-Hardened-BYOS-Azure Image SLES15-SP7-Hardened-BYOS-EC2 Image SLES15-SP7-Hardened-BYOS-GCE Image SLES15-SP7-SAPCAL-Azure Image SLES15-SP7-SAPCAL-EC2 Image SLES15-SP7-SAPCAL-GCE Affected
Image SLES15-SP7-SAP-Azure Image SLES15-SP7-SAP-Azure-3P Image SLES15-SP7-SAP-BYOS-Azure Image SLES15-SP7-SAP-BYOS-EC2 Image SLES15-SP7-SAP-BYOS-GCE Image SLES15-SP7-SAP-EC2 Image SLES15-SP7-SAP-GCE Image SLES15-SP7-SAP-Hardened-Azure Image SLES15-SP7-SAP-Hardened-BYOS-Azure Image SLES15-SP7-SAP-Hardened-BYOS-EC2 Image SLES15-SP7-SAP-Hardened-BYOS-GCE Image SLES15-SP7-SAP-Hardened-GCE Affected

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EUVD-2026-39307 vulnerability details – vuln.today
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