CVE-2026-98492
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths Fix 3 leaks in macb_alloc() error paths: - Tx buffer allocated but crossing a 4G boundary: Tx leaked. - Rx buffer allocation fails: Tx leaked. - Rx buffer allocated but crossing a 4G boundary: Tx & Rx leaked. This is because our error handling calls macb_free(bp) which in turn frees the buffers stored in bp->queues[0], but nothing has been stored in there. Fix by storing allocated buffers into bp->queues[0] ASAP.
Affected versions
Linux kernel versions
6.17.3,
6.18
and later are affected. Fixed in
6.18.55,
7.2.9,
7.3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-98492?
CVE-2026-98492 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17.3 onward and has been patched in 6.18.55, 7.2.9 and 7.3. CVE-2026-98492 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-2026-98492?
Yes. CVE-2026-98492 has been patched. Fixed versions include 6.18.55, 7.2.9 and 7.3. If you are running Linux kernel 6.17.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98492 actively exploited?
No. CVE-2026-98492 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.