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Review reviewHigh

CVE-2026-23378

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: net/sched: act_ife: Fix metalist update behavior Whenever an ife action replace changes the metalist, instead of replacing the old data on the metalist, the current ife code is appending the new metadata. Aside from being innapropriate behavior, this may lead to an unbounded addition of metadata to the metalist which might cause an out of bounds error when running the encode op: [ 138.423369][ C1] ================================================================== [ 138.424317][ C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_...

CVSS
7.8
EPSS
0.13%
2.95% percentile
CISA KEV
Not listed
Published
2026.03.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ife: Fix metalist update behavior Whenever an ife action replace changes the metalist, instead of replacing the old data on the metalist, the current ife code is appending the new metadata. Aside from being innapropriate behavior, this may lead to an unbounded addition of metadata to the metalist which might cause an out of bounds error when running the encode op: [ 138.423369][ C1] ================================================================== [ 138.424317][ C1] BUG: KASAN: slab-out-of-bounds in ife_tlv_...

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
>= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < 56ade7ddea6ce605552341785d08e365c3f61861, >= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < 5b1449301ca070814d866990b46f48d3f39ea4ee, >= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < 91a89d3bdc2f63d983adc13d1771631663c5dc1b, >= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < cd888c3966672239f2e0707b846a5a936ac9038a, >= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < 691866c4cca54dc4df762276b49e89b36e046947, >= aa9fd9a325d51fa0b11153b03b8fefff569fa955 < e2cedd400c3ec0302ffca2490e8751772906ac23, >= 4.15, >= V3.1.6, >= V3.1.5, >= 4.15.1 < 6.1.167, >= 6.2 < 6.6.130, >= 6.7 < 6.12.77, >= 6.13 < 6.18.17, >= 6.19 < 6.19.7, 4.15, 7.0
Fixed versions
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