CVE-2026-64531
Linux Kernel Vulnerability in NetApp Products
CVE-2026-64531: Linux Kernel Vulnerability in NetApp Products. Not in the CISA KEV catalog. High advisory severity (CVSS 7.8, NetApp).
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
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CVE-2026-64531 key facts
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- CVSS base score
- 7.8 (NetApp), 7.8 (Red Hat)
- Fixed releases
- Red Hat: kernel-0:6.12.0-211.46.1.el10_2, kpatch-patch, kernel-0:5.14.0-687.38.1.el9_8, kernel-0:5.14.0-284.186.1.el9_2, kernel-rt-0:5.14.0-284.186.1.rt14.471.el9_2, kernel-0:5.14.0-427.143.1.el9_4 and 17 more in the advisory
- VulniPulse record
- Published · Updated
Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-64531; bulletin-wide values are not repeated here.
Is CVE-2026-64531 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-64531 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-64531?
Upgrade to a fixed release named by the vendor:
- Red Hat: kernel-0:6.12.0-211.46.1.el10_2, kpatch-patch, kernel-0:5.14.0-687.38.1.el9_8, kernel-0:5.14.0-284.186.1.el9_2, kernel-rt-0:5.14.0-284.186.1.rt14.471.el9_2, kernel-0:5.14.0-427.143.1.el9_4
- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. If OVS is not required on a given system, unloading the openvswitch module (`modprobe -r openvswitch`) eliminates the attack surface entirely. For systems that require OVS but cannot patch immediately, the single most effective mitigation is disabling unprivileged user namespaces (`sysctl -w user.max_user_namespaces=0`), which blocks the primary path an unprivileged attacker uses to obtain CAP_NET_ADMIN and reach the vulnerable netlink interface. Standard kernel hardening (KASLR, SMEP, SMAP, kptr_restrict) is enabled by default on supported RHEL kernels and significantly increases exploitation complexity, but these controls are defense-in-depth and not a substitute for patching or removing the vulnerable module. (Red Hat)
Vendor advisory comparison
NetApp
1 advisory- Advisory severityHigh7.8
High [CVE-2026-64531] Linux Kernel Vulnerability in NetApp Products
NTAP-20260807-0005Source published Source updated
Certain Linux kernel versions are susceptible to a vulnerability referred to as OVSwrap which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2026-64531] reject oversized nested action attrs
CVE-2026-64531Source published Source updated
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbehaving actions length check") allowed the total sw_flow_actions stream to grow beyond 64 KiB, which is valid, but also removed the last guard preventing a generated nested action attribute from exceeding U16_MAX. An oversized generated container can thus be closed with a truncated nla_len. A later dump or teardown then walks a structurally different stream than the one that was validated. In particular, an oversized nested CLONE/CT action may cause subsequent bytes in the generated stream to be interpreted as independent actions. Keep…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
- Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions
- Red Hat OpenShift Container Platform 4.14
4 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- kernel-0:6.12.0-211.46.1.el10_2
- kpatch-patch
- kernel-0:5.14.0-687.38.1.el9_8
- kernel-0:5.14.0-284.186.1.el9_2
19 more entries in the full advisory.
- Mitigation guidance
- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. If OVS is not required on a given system, unloading the openvswitch module (`modprobe -r openvswitch`) eliminates the attack surface entirely. For systems that require OVS but cannot patch immediately, the single most effective mitigation is disabling unprivileged user namespaces (`sysctl -w user.max_user_namespaces=0`), which blocks the primary path an unprivileged attacker uses to obtain CAP_NET_ADMIN and reach the vulnerable netlink interface. Standard kernel hardening (KASLR, SMEP, SMAP, kptr_restrict) is enabled by default on supported RHEL kernels and significantly increases exploitation complexity, but these controls are defense-in-depth and not a substitute for patching or removing the vulnerable module.
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