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Highest advisory severityCritical 3 vendors · 3 advisories

CVE-2026-98432

Linux kernel RCE CVE-2026-98432

CVE-2026-98432: Linux kernel RCE CVE-2026-98432. Not in the CISA KEV catalog. Critical advisory severity (CVSS 9.8, Fortinet).

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-2026-98432 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Critical
CVSS base score
9.8 (Fortinet), 9.8 (NetApp), 9.8 (Red Hat)
Weakness
CWE-825
Fixed releases
  • Red Hat: kernel-0:6.12.0-211.72.1.el10_2, kernel-0:5.14.0-687.64.1.el9_8, kernel-0:4.18.0-553.182.1.el8_10, kernel-rt-0:4.18.0-553.182.1.rt7.523.el8_10, RHSA-2026:93415
Vendor advisories
3 from Fortinet, NetApp, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-98432; bulletin-wide values are not repeated here.

Is CVE-2026-98432 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-98432 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-2026-98432?

Upgrade to a fixed release named by the vendor:

  • Red Hat: kernel-0:6.12.0-211.72.1.el10_2, kernel-0:5.14.0-687.64.1.el9_8, kernel-0:4.18.0-553.182.1.el8_10, kernel-rt-0:4.18.0-553.182.1.rt7.523.el8_10, RHSA-2026:93415
  • Since commit 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table"), request sockets are processed without holding the listener lock, so nothing prevents the child socket from being freed while the SYNACK is still being built. (Fortinet)
  • This will be addressed in a separate patch. (Fortinet)
  • 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

Fortinet

1 advisory
  • Advisory severityCritical9.8

    Critical [CVE-2026-98432] Linux kernel RCE CVE-2026-98432

    FG-IR-26-188Source published Source updated

    CVSSv3 Score: 9.8 CVE-2026-98432:ipv4: free inet_opt and ireq_opt after an RCU grace period tcp_v4_syn_recv_sock() transfers ownership of ireq->ireq_opt to the child socket (newinet->inet_opt) without copying it. Another cpu can concurrently process a retransmitted SYN for the same request socket, and send a SYNACK from tcp_check_req(). tcp_v4_send_synack() and inet_csk_route_req() read ireq->ireq_opt under rcu_read_lock() only, and ip_build_and_send_pkt() and ip_options_build() then read opt->optlen twice. Note that the SYNACK timer itself is not an issue: it holds a reference on its request socket, and inet_csk_reqsk_queue_drop() calls timer_delete_sync() before the child can be freed. Since commit 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table"), request sockets…

    Related products — impact not confirmed
    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
    • Since commit 079096f103fa ("tcp/dccp: install syn_recv requests into ehash table"), request sockets are processed without holding the listener lock, so nothing prevents the child socket from being freed while the SYNACK is still being built.
    • This will be addressed in a separate patch.
    Full advisory and evidenceOpen source bulletin

NetApp

1 advisory
  • Advisory severityCritical9.8

    Critical [CVE-2026-98432] Linux Kernel Vulnerability in NetApp Products

    NTAP-20261102-0001Source published Source updated

    Linux kernel versions 4.4 through 5.10.271, 5.11 through 5.15.222, 5.16 through 6.1.189, 6.13 through 6.18.55, 6.19 through 7.2.9, 6.2 through 6.6.158, 6.7 through 6.12.112 and 7.3 through 7.3-rc6 are susceptible to a vulnerability which could allow remote unauthenticated attackers to execute commands with root privileges. Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data or Denial of Service (DoS). Affected products: AFF/ASA/FAS Baseboard Management Controller (BMC) - A1K/A90/A70/C80/FAS90/FAS70, AFF/ASA/FAS Baseboard Management Controller (BMC) - A50/A30/A20/C60/C30/FAS50, E-Series SANtricity OS Controller Software, FAS/AFF Baseboard Management Controller (BMC) - A320, FAS/AFF Baseboard Management…

    Affected products in this advisory
    • AFF/ASA/FAS Baseboard Management Controller (BMC) - A1K/A90/A70/C80/FAS90/FAS70
    • AFF/ASA/FAS Baseboard Management Controller (BMC) - A50/A30/A20/C60/C30/FAS50
    • E-Series SANtricity OS Controller Software
    • FAS/AFF Baseboard Management Controller (BMC) - A320

    8 more entries in the full advisory.

    Source-reported affected versions
    • 5.10.271
    • 5.11
    • 5.15.222
    • 5.16

    7 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 severityCritical9.8

    Critical [CVE-2026-98432] free inet_opt and ireq_opt after an RCU grace period

    CVE-2026-98432Source published Source updated

    free inet_opt and ireq_opt after an RCU grace period. Red Hat rates this critical (CVSS 9.8). Weakness: CWE-825. Red Hat lists fixing advisory RHSA-2026:93415 with package kernel-0:6.12.0-211.72.1.el10_2, kernel-0:5.14.0-687.64.1.el9_8, kernel-0:4.18.0-553.182.1.el8_10, kernel-rt-0:4.18.0-553.182.1.rt7.523.el8_10. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.

    Related products — impact not confirmed
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 8
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • kernel-0:6.12.0-211.72.1.el10_2
    • kernel-0:5.14.0-687.64.1.el9_8
    • kernel-0:4.18.0-553.182.1.el8_10
    • kernel-rt-0:4.18.0-553.182.1.rt7.523.el8_10

    1 more entries in the full advisory.

    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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