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Review reviewHigh

CVE-2026-23422

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: Fix interrupt storm after receiving bad if_id in IRQ handler Commit 31a7a0bbeb00 ("dpaa2-switch: add bounds check for if_id in IRQ handler") introduces a range check for if_id to avoid an out-of-bounds access. If an out-of-bounds if_id is detected, the interrupt status is not cleared. This may result in an interrupt storm. Clear the interrupt status after detecting an out-of-bounds if_id to avoid the problem. Found by an experimental AI code review agent at Google.

CVSS
7.8
EPSS
0.12%
2.46% percentile
CISA KEV
Not listed
Published
2026.04.03
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.12%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: Fix interrupt storm after receiving bad if_id in IRQ handler Commit 31a7a0bbeb00 ("dpaa2-switch: add bounds check for if_id in IRQ handler") introduces a range check for if_id to avoid an out-of-bounds access. If an out-of-bounds if_id is detected, the interrupt status is not cleared. This may result in an interrupt storm. Clear the interrupt status after detecting an out-of-bounds if_id to avoid the problem. Found by an experimental AI code review agent at Google.

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected versions
>= 77611cab5bdfff7a070ae574bbfba20a1de99d1b < 7def51cb9fb8b8d5342443372b8cf28d8fbd7f3d, >= 34b56c16efd61325d80bf1d780d0e176be662f59 < b5bababe7703a7322bc59b803ab1587887a2a5e4, >= f89e33c9c37f0001b730e23b3b05ab7b1ecface2 < c7becfe3e604d138bd53b8ac3111b2b3e8ec6b0e, >= 2447edc367800ba914acf7ddd5d250416b45fb31 < fa4412cdc5178a48799bafcb8af28fd2fbf3d703, >= 1b381a638e1851d8cfdfe08ed9cdbec5295b18c9 < 00f42ace446f1e4bf84988f2281131f52cd32796, >= 31a7a0bbeb006bac2d9c81a2874825025214b6d8 < 28fd8ac1d49389cb230d712116f54e27ebec11b8, >= 31a7a0bbeb006bac2d9c81a2874825025214b6d8 < 74badb9c20b1a9c02a95c735c6d3cd6121679c93, >= 5.15.200 < 5.15.203, >= 6.1.163 < 6.1.167, >= 6.6.124 < 6.6.130, >= 6.12.70 < 6.12.77, >= 6.18.10 < 6.18.17, >= 6.19, >= V3.1.6, >= V3.1.5, >= 6.19.1 < 6.19.7, 6.19, 7.0
Fixed versions
5.15.203, 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787