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Highest advisory severityMedium 2 vendors · 2 advisories

CVE-2026-53176

Linux Kernel Vulnerability in NetApp Products

CVE-2026-53176: Linux Kernel Vulnerability in NetApp Products. Not in the CISA KEV catalog. Medium advisory severity (CVSS 6.5, 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-2026-53176 key facts

CISA KEV
Not listed (catalog checked )
Highest advisory severity
Medium
CVSS base score
6.5 (NetApp), 6.5 (Red Hat)
Fixed releases
  • Red Hat: kernel-0:6.12.0-211.56.1.el10_2, kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10, kernel-0:4.18.0-553.164.1.el8_10, kernel-0:5.14.0-687.49.1.el9_8, RHSA-2026:68507, RHSA-2026:68532 and 2 more in the advisory
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-2026-53176; bulletin-wide values are not repeated here.

Is CVE-2026-53176 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53176 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-2026-53176?

Upgrade to a fixed release named by the vendor:

  • Red Hat: kernel-0:6.12.0-211.56.1.el10_2, kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10, kernel-0:4.18.0-553.164.1.el8_10, kernel-0:5.14.0-687.49.1.el9_8, RHSA-2026:68507, RHSA-2026:68532
  • NetApp HCI Baseboard Management Controller (BMC) - H610S has no planned fix; migrate to a supported release or product and consult NetApp's end-of-support notice. (NetApp)
  • To mitigate this issue, prevent module ib_isert from being loaded. Please see for how to blacklist a kernel module to prevent it from loading automatically. (Red Hat)

Vendor advisory comparison

NetApp

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-53176] Linux Kernel Vulnerability in NetApp Products

    NTAP-20261030-0009Source published Source updated

    Linux kernel versions 3.10 through 5.10.258, 5.11 through 5.15.209, 5.16 through 6.1.175, 6.2 through 6.6.142, 6.7 through 6.12.93, 6.13 through 6.18.35 and 6.19 through 7.0.12 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to Denial of Service (DoS). Affected products: NetApp HCI Baseboard Management Controller (BMC) - H610S, 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 there is no workaround available at this time.

    Affected products in this advisory
    • NetApp HCI Baseboard Management Controller (BMC) - H610S
    • ONTAP Select Deploy administration utility
    Source-reported affected versions
    • 3.10
    • 5.10.258
    • 5.11
    • 5.15.209

    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
    • NetApp HCI Baseboard Management Controller (BMC) - H610S has no planned fix; migrate to a supported release or product and consult NetApp's end-of-support notice.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityMedium6.5

    Medium [CVE-2026-53176] Reject login PDUs shorter than ISER_HEADERS_LEN

    CVE-2026-53176Source published Source updated

    In the Linux kernel, the following vulnerability has been resolved: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN In drivers/infiniband/ulp/isert/ib_isert.c, isert_login_recv_done() computes the login request payload length as wc->byte_len minus ISER_HEADERS_LEN with no lower bound, and login_req_len is a signed int. A remote iSER initiator can post a login Send work request carrying fewer than ISER_HEADERS_LEN (76) bytes, so the subtraction underflows and login_req_len becomes negative. isert_rx_login_req() then reads that negative length back into a signed int, takes size = min(rx_buflen, MAX_KEY_VALUE_PAIRS), and because the min() is signed it keeps the negative value; the value is then passed as the memcpy() length and sign-extended to a multi-gigabyte size_t. The copy…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 7

    1 more entries in the full advisory.

    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • kernel-0:6.12.0-211.56.1.el10_2
    • kernel-rt-0:4.18.0-553.164.1.rt7.505.el8_10
    • kernel-0:4.18.0-553.164.1.el8_10
    • kernel-0:5.14.0-687.49.1.el9_8

    4 more entries in the full advisory.

    Mitigation guidance
    • To mitigate this issue, prevent module ib_isert from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
    Full advisory and evidenceOpen source bulletin

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