CVE-2026-74737
Linux kernel vulnerability
- Published26 Aug 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.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HRemediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
References
- https://git.kernel.org/stable/c/14fc40bf28390e0ebee6a072457c36b82c614100
- https://git.kernel.org/stable/c/1c0e35ce761131f82062222779d8574849790892
- https://git.kernel.org/stable/c/36a05d2820077bb3955acb8111e1041d39148037
- https://git.kernel.org/stable/c/46a8e084a159e638ac2728e96980b65d752d65fd
- https://git.kernel.org/stable/c/551688b410d3fb0dae7739724422f268cd9446d6
- https://git.kernel.org/stable/c/72e4e3d7efc3b7d85f86abbe8b94f8e45074abe3
- https://git.kernel.org/stable/c/914e0100df3435bd14d09f397238e891cf9b7dce
- https://git.kernel.org/stable/c/9a220225efd6f58350bbb53fe70bdec08519267f
Frequently asked
Is CVE-2026-74737 being actively exploited?
CVE-2026-74737 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.76%.
How severe is CVE-2026-74737?
CVE-2026-74737 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.76% probability of exploitation.
How do I fix CVE-2026-74737?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-74737 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.