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Linux Kernel CVE-2026-72065

| EUVDEUVD-2026-59023 CRITICAL
2026-08-15 416baaa9-dc9f-4396-8d5f-8c081fb06d67 GHSA-pwf3-8jwg-55rq
Information Disclosure Linux
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
5.7 MEDIUM

Requires control of NIC/hypervisor-supplied CQE data (PR:H, AC:H, local device interface AV:L); impact is memory over-read (C:H) and crash (A:H) with no integrity write, so I:N.

3.1 AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H
4.0 AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat
7.0 MEDIUM
qualitative

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
Aug 17, 2026 - 06:36 vuln.today
CVSS changed
Aug 17, 2026 - 06:22 NVD
9.8 (CRITICAL)
Patch available
Aug 15, 2026 - 07:20 EUVD
CVE Published
Aug 15, 2026 - 06:21 cve.org
CRITICAL 9.8
CVE Published
Aug 15, 2026 - 06:21 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

net: mana: Validate the packet length reported by the NIC

Validate the packet length reported in the RX CQE before passing it to skb processing. The CQE is supplied by the NIC device and should not be blindly trusted.

AnalysisAI

Out-of-bounds memory access in the Linux kernel MANA (Microsoft Azure Network Adapter) Ethernet driver arises because the RX completion queue entry (CQE) packet length reported by the NIC was passed to skb processing without validation. Affected systems are Linux VMs running the mana_en driver, predominantly Azure guests using MANA/SR-IOV networking. A NIC (or malicious hypervisor/device) supplying a crafted oversized length can trigger an out-of-bounds read leading to information disclosure or a kernel crash; the vulnerability is tagged Information Disclosure, has no public exploit identified at time of analysis, and carries a low EPSS of 0.21%.

Technical ContextAI

The flaw is in the MANA driver (drivers/net/ethernet/microsoft/mana), which implements networking for Microsoft Azure Network Adapter hardware and its virtualized/SR-IOV presentation to Linux guests. On the receive path the driver reads a packet length field from the RX CQE - a completion descriptor written by the NIC/device into host-visible memory - and uses it to construct and process an sk_buff. Because the length was trusted implicitly, a value exceeding the actual buffer or MTU could drive skb code past the allocated region. The root cause is the CWE-20 / CWE-125 class (improper input validation leading to out-of-bounds read of device-supplied data); the CWE field in the source data is 'N/A' so this class is inferred from the description and Information Disclosure tag. No CPE strings were provided; affected products are identified from EUVD kernel commit ranges rather than formal CPE.

RemediationAI

Vendor-released patch: upgrade to a fixed stable kernel - 6.6.148, 6.12.101, 6.18.42, or 7.1.5 (or 7.2-rc3 for mainline) as appropriate to your branch - obtained via your distribution's kernel update channel; the upstream fix commits are at https://git.kernel.org/stable/c/282c5214ca4eb3799158c76782646e86d2945d1b and the companion commits listed in the references. Because the affected code is the mana_en driver, systems that do not load MANA (non-Azure hosts, or Azure VMs not using MANA/SR-IOV) are not exposed and can deprioritize. Where immediate patching is not possible on Azure guests, a compensating control is to avoid or disable MANA/accelerated-networking SR-IOV so traffic falls back to the synthetic netvsc path, at the cost of reduced network throughput and higher CPU; there is no configuration-level fix within the driver itself, so kernel upgrade remains the primary remediation.

Same technique Information Disclosure

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-72065 vulnerability details – vuln.today
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