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ReviewCritical

CVE-2026-74737

Linux

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG On the packet reception path, the ID of the MAC Port on which the packet was received, is embedded in the RX DMA Descriptor's metadata. The ID is extracted using the helper function cppi5_desc_get_tags_ids() which fills in the 16-bit Source Tag into the 'port_id' variable. However, it is only the lower 8-bits of the 16-bit Source Tag that represent the MAC Port ID, while the upper 8-bits are Hardware-Reserved and carry an arbitrary value. With the existi...

CVSS
9.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.27
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG On the packet reception path, the ID of the MAC Port on which the packet was received, is embedded in the RX DMA Descriptor's metadata. The ID is extracted using the helper function cppi5_desc_get_tags_ids() which fills in the 16-bit Source Tag into the 'port_id' variable. However, it is only the lower 8-bits of the 16-bit Source Tag that represent the MAC Port ID, while the upper 8-bits are Hardware-Reserved and carry an arbitrary value. With the existi...

Affected product and versions

Product
Linux
Affected versions
>= 93a76530316a3d8cc2d82c3deca48424fee92100 < 14fc40bf28390e0ebee6a072457c36b82c614100, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 1c0e35ce761131f82062222779d8574849790892, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 9a220225efd6f58350bbb53fe70bdec08519267f, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 551688b410d3fb0dae7739724422f268cd9446d6, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 46a8e084a159e638ac2728e96980b65d752d65fd, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 914e0100df3435bd14d09f397238e891cf9b7dce, >= 93a76530316a3d8cc2d82c3deca48424fee92100 < 36a05d2820077bb3955acb8111e1041d39148037, >= 5.7
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Not available