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CVE-2026-74737— net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： 网络：以太网：TI：am65-cpsw-nuss：修复从源标签（SRC TAG）中提取 port_id 的问题 在数据包接收路径中，接收数据包的 MAC 端口 ID 被嵌入在接收（RX）DMA 描述符的元数据中。该 ID 通过辅助函数 提取，该函数将 16 位源标签（Source Tag）填充到 变量中。然而，只有 16 位源标签的低 8 位才表示 MAC 端口 ID，而高 8 位为硬件保留位，可能包含任意值。由于现有的逻辑直接使用完整的 16 位标签值作为 ，当高 8

CVSS 9.8 · Critical

Possible ATT&CK Techniques 1 AI

T1560 · Archive Collected Data

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 93a76530316a3d8cc2d82c3deca48424fee92100< 14fc40bf28390e0ebee6a072457c36b82c614100 affected
93a76530316a3d8cc2d82c3deca48424fee92100< 1c0e35ce761131f82062222779d8574849790892 affected
93a76530316a3d8cc2d82c3deca48424fee92100< 9a220225efd6f58350bbb53fe70bdec08519267f affected
93a76530316a3d8cc2d82c3deca48424fee92100< 551688b410d3fb0dae7739724422f268cd9446d6 affected
93a76530316a3d8cc2d82c3deca48424fee92100< 46a8e084a159e638ac2728e96980b65d752d65fd affected
93a76530316a3d8cc2d82c3deca48424fee92100< 72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3 affected
93a76530316a3d8cc2d82c3deca48424fee92100< 914e0100df3435bd14d09f397238e891cf9b7dce affected
93a76530316a3d8cc2d82c3deca48424fee92100< 36a05d2820077bb3955acb8111e1041d39148037 affected
… +10 more rows
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I. Basic Information for CVE-2026-74737

Vulnerability Information
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Vulnerability Title
net: ethernet: ti: am65-cpsw-nuss: Fix port_id extraction from SRC TAG
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 93a76530316a3d8cc2d82c3deca48424fee92100 ~ 14fc40bf28390e0ebee6a072457c36b82c614100 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-74737

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III. Intelligence Information for CVE-2026-74737

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Patches & Fixes for CVE-2026-74737 (8)

Same Patch Batch · Linux · 2026-08-26 · 92 CVEs total

CVE-2026-74744 9.8 CRITICAL ipvlan: inherit needed_headroom and needed_tailroom from phy_dev
CVE-2026-74752 9.8 CRITICAL sctp: validate cookie AUTH state before use
CVE-2026-80586 9.8 CRITICAL mptcp: options: reset DSS fields in case of unexpected size
CVE-2026-80519 9.8 CRITICAL ovpn: finish crypto callback cleanup before peer release
CVE-2026-80558 9.8 CRITICAL libceph: Avoid using invalid osd indices from primary_temp
CVE-2026-74746 9.8 CRITICAL netfilter: flowtable: publish GC-visible tuple last
CVE-2026-74743 9.8 CRITICAL macvlan: inherit needed_headroom and needed_tailroom from lowerdev
CVE-2026-80561 9.8 CRITICAL libceph: fix multiple unsafe decodes in decode_locker()
CVE-2026-80528 9.8 CRITICAL ceph: avoid fs reclaim while using current->journal_info
CVE-2026-80587 9.8 CRITICAL mptcp: avoid combining some incoming suboptions
CVE-2026-80557 9.8 CRITICAL libceph: fix OOB read in decode_watchers() via missing bounds check
CVE-2026-80589 9.8 CRITICAL block: stop the timeout timer when releasing a never added disk
CVE-2026-80585 9.4 CRITICAL mptcp: fastopen: only mark MPTFO subflows with SYN data
CVE-2026-74751 9.4 CRITICAL riscv: lib: Fix ZBB strnlen reading past count boundary
CVE-2026-80551 9.3 CRITICAL s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80554 9.3 CRITICAL s390/vfio_ccw: Limit the number of channel program segments
CVE-2026-80552 8.8 HIGH s390/vfio_ccw: Ensure index for read/write regions are within range
CVE-2026-80553 8.8 HIGH s390/vfio_ccw: Cancel existing workqueues
CVE-2026-80547 8.8 HIGH s390/vfio_ccw: Implement a crw lock
CVE-2026-80576 8.8 HIGH drm/amdgpu: reject oversized IBs with per-ring packet limits

Showing top 20 of 92 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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