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Highest advisory severityCritical 2 vendors · 2 advisories

CVE-2026-64535

Linux Kernel Vulnerability in NetApp Products

CVE-2026-64535: Linux Kernel Vulnerability in NetApp Products. Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.8, 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-2026-64535 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Critical
CVSS base score
9.8 (NetApp), 6.5 (Red Hat)
Vendor advisories
2 from NetApp, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-64535; bulletin-wide values are not repeated here.

Is CVE-2026-64535 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-64535 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-2026-64535?

  • There is no mitigation for this issue other than applying the kernel update once available. Because Red Hat does not support and does not enable the nvmet-tcp target functionality by default, systems that have not been explicitly configured with nvmetcli to act as an NVMe-over-Fabrics TCP target are not exposed and require no immediate action. Administrators who have deliberately configured an NVMe/TCP target using this unsupported functionality should restrict network access to the target port to trusted initiators on the same storage network only, and should consider disabling NVMe/TCP data digest or migrating off nvmet-tcp given its unmaintained status, until the fix is applied. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityCritical9.8

    Critical [CVE-2026-64535] Linux Kernel Vulnerability in NetApp Products

    NTAP-20260814-0004Source published Source updated

    Linux kernel versions 5.10.20 prior to 5.11, 5.11.3 prior to 5.12, 5.12 prior to 6.1.178, 6.2.0 prior to 6.6.145, 6.7.0 prior to 6.12.97, 6.13.0 prior to 6.18.40, and 6.19.0 prior to 7.1 are susceptible to a vulnerability which when successfully exploited could lead to disclosure of sensitive information, addition or modification of data, or 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
    • 5.10.20
    • 5.11
    • 5.11.3
    • 5.12

    8 more entries in the full advisory.

    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.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-64535] Fix potential UAF when ddgst mismatch

    CVE-2026-64535Source published Source updated

    In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Fix potential UAF when ddgst mismatch Shivam Kumar found via vulnerability testing: When data digest is enabled on an NVMe/TCP connection and a digest mismatch occurs on a non-final H2C_DATA PDU during an R2T-based data transfer, the digest error handler in nvmet_tcp_try_recv_ddgst() calls nvmet_req_uninit() — which performs percpu_ref_put() on the submission queue — but does NOT mark the command as completed. It does not set cqe->status, does not modify rbytes_done, and does not clear any flag. When the subsequent fatal error triggers queue teardown, nvmet_tcp_uninit_data_in_cmds() iterates all commands, checks nvmet_tcp_need_data_in() for each one, and finds that the already-uninited command still appears to…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux for NVIDIA 26

    2 more entries in the full advisory.

    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
    • There is no mitigation for this issue other than applying the kernel update once available. Because Red Hat does not support and does not enable the nvmet-tcp target functionality by default, systems that have not been explicitly configured with nvmetcli to act as an NVMe-over-Fabrics TCP target are not exposed and require no immediate action. Administrators who have deliberately configured an NVMe/TCP target using this unsupported functionality should restrict network access to the target port to trusted initiators on the same storage network only, and should consider disabling NVMe/TCP data digest or migrating off nvmet-tcp given its unmaintained status, until the fix is applied.
    Full advisory and evidenceOpen source bulletin

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