CVE-2026-72017
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.
Affected versions
Linux kernel versions
2.6.20
and later are affected. Fixed in
6.6.148,
6.12.101,
6.18.40,
7.1.5,
7.2-rc3
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-72017?
CVE-2026-72017 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.20 onward and has been patched in 6.6.148, 6.12.101, 6.18.40 and others. CVE-2026-72017 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72017?
Yes. CVE-2026-72017 has been patched. Fixed versions include 6.6.148, 6.12.101, 6.18.40 and others. If you are running Linux kernel 2.6.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72017 actively exploited?
No. CVE-2026-72017 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.