CVE Catalog

CVE-2026-72017

Low risk· EPSS 10%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.20%

10th percentile - higher than 10% of all known CVEs

Summary

In the Linux kernel, in the net: macb driver, there is a memory leak for outgoing SKBs that have not been marked as completed. The function macb_free_consistent() does not free these packets, leading to memory leak. The fix adds freeing of these packets during interface close.

Risk Assessment

Memory leak may lead to exhaustion of system resources, especially in systems with long uptime and frequent interface closures.

Recommendation

It is recommended to update the Linux kernel to a patched version and monitor memory usage on systems with MACB controllers.

Other vulnerabilities in Linux kernel

See all
Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: net: macb: drop in-flight Tx SKBs on close The MACB driver has since forever leaked the outgoing SKBs that have not yet been marked as completed. They live in queue->tx_skb which gets freed without remorse nor checking. macb_free_consistent() gets called in a few codepaths, but only close will trigger the added expressions. In macb_open() and macb_alloc_consistent() failure cases, queues' tx_skb just got allocated and are empty.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS