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Highest advisory severityCritical 2 vendors · 2 advisories

CVE-2026-99999

Linux Kernel Vulnerability in NetApp Products

CVE-2026-99999: Linux Kernel Vulnerability in NetApp Products. Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.3, 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.

NVD detail CVE.org

CVE-2026-99999 at a glance

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Critical
CVSS base score
9.3 (NetApp), 8.8 (Red Hat)
Weakness
CWE-787
Fixed releases
  • Red Hat: kernel-0:5.14.0-687.59.1.el9_8, kernel-0:5.14.0-427.157.1.el9_4, kernel-0:6.12.0-55.112.1.el10_0, RHSA-2026:86089
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-2026-99999; bulletin-wide values are not repeated here.

Is CVE-2026-99999 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-99999 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-2026-99999?

Upgrade to a fixed release named by the vendor:

  • Red Hat: kernel-0:5.14.0-687.59.1.el9_8, kernel-0:5.14.0-427.157.1.el9_4, kernel-0:6.12.0-55.112.1.el10_0, RHSA-2026:86089
  • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityCritical9.3

    Critical [CVE-2026-99999] Linux Kernel Vulnerability in NetApp Products

    NTAP-20261021-0001Source published Source updated

    Linux kernel versions 2.6.27 through 5.10.271, 5.11 through 5.15.222, 5.16 through 6.1.189, 6.2 through 6.6.158, 6.7 through 6.12.112, 6.13 through 6.18.56, 6.19 through 7.2.10 and 7.3 through 7.3-rc6 are susceptible to a vulnerability known as PwnEscape, a guest-to-host escape vulnerability. Successful exploitation could allow a local attacker or untrusted guest virtual machine to perform arbitrary code execution on the host. Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data or Denial of Service (DoS). Affected products: ONTAP Select Deploy administration utility. NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states…

    Affected products in this advisory
    • ONTAP Select Deploy administration utility
    Source-reported affected versions
    • 2.6.27
    • 5.10.271
    • 5.11
    • 5.15.222

    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 severityHigh8.8

    High [CVE-2026-99999] validate checksum_start before completing checksum

    CVE-2026-99999Source published Source updated

    validate checksum_start before completing checksum. Red Hat rates this important (CVSS 8.8). Weakness: CWE-787. Red Hat lists fixing advisory RHSA-2026:86089 with package kernel-0:5.14.0-687.59.1.el9_8, kernel-0:5.14.0-427.157.1.el9_4, kernel-0:6.12.0-55.112.1.el10_0. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 10.

    Related products — impact not confirmed
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 10
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • kernel-0:5.14.0-687.59.1.el9_8
    • kernel-0:5.14.0-427.157.1.el9_4
    • kernel-0:6.12.0-55.112.1.el10_0
    • RHSA-2026:86089
    Mitigation guidance
    • Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
    Full advisory and evidenceOpen source bulletin

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