CVE-2026-74737

net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG

State: Published
Severity: 9.8 Critical
Published: Aug 26, 2026
Updated: Aug 27, 2026
Reserved: Aug 15, 2026

Description

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 existing logic, sporadic kernel crash is observed due to the subsequent driver code accessing out-of-bound memory because of an invalid port_id.

Hence, fix the port_id extraction logic to use only the lower 8-bits of the Source Tag as the MAC Port ID.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	93a76530316a3d8cc2d82c3deca48424fee92100 to before 14fc40bf28390e0ebee6a072457c36b82c614100Affected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 1c0e35ce761131f82062222779d8574849790892Affected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 9a220225efd6f58350bbb53fe70bdec08519267fAffected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 551688b410d3fb0dae7739724422f268cd9446d6Affected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 46a8e084a159e638ac2728e96980b65d752d65fdAffected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3Affected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 914e0100df3435bd14d09f397238e891cf9b7dceAffected 93a76530316a3d8cc2d82c3deca48424fee92100 to before 36a05d2820077bb3955acb8111e1041d39148037Affected
LinuxLinux	5.7Affected before 5.7Not affected 5.10.266 through 5.10.Not affected 5.15.217 through 5.15.Not affected 6.1.184 through 6.1.Not affected 6.6.153 through 6.6.Not affected 6.12.105 through 6.12.Not affected 6.18.46 through 6.18.Not affected 7.1.10 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

93a76530316a3d8cc2d82c3deca48424fee92100 to before 14fc40bf28390e0ebee6a072457c36b82c614100Affected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 1c0e35ce761131f82062222779d8574849790892Affected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 9a220225efd6f58350bbb53fe70bdec08519267fAffected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 551688b410d3fb0dae7739724422f268cd9446d6Affected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 46a8e084a159e638ac2728e96980b65d752d65fdAffected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3Affected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 914e0100df3435bd14d09f397238e891cf9b7dceAffected
93a76530316a3d8cc2d82c3deca48424fee92100 to before 36a05d2820077bb3955acb8111e1041d39148037Affected

LinuxLinux

5.7Affected
before 5.7Not affected
5.10.266 through 5.10.*Not affected
5.15.217 through 5.15.*Not affected
6.1.184 through 6.1.*Not affected
6.6.153 through 6.6.*Not affected
6.12.105 through 6.12.*Not affected
6.18.46 through 6.18.*Not affected
7.1.10 through 7.1.*Not affected
7.2 and laterNot affected

References

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