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CVE-2026-98492

net: macb: fix dma_alloc_coherent() leak on macb_alloc() error paths PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Linux / Linuxaffected 78d901897b3cae06b38f54e48a2378cf9da21175 before bda487567d0b7b15dfa876511085c0666b9efad5; affected 78d901897b3cae06b38f54e48a2378cf9da21175 before 259e6cbb6a097da8ced544ee92a6fbde35aa1338; affected 78d901897b3cae06b38f54e48a2378cf9da21175 before 23d42b9a3bcd55b17d3b371544fedc708c2397e9; affected 982a4d9a2e12b693f684eff943043a607628d871; affected 6.17.3 before 6.18
Linux / Linuxaffected 6.18; unaffected 0 before 6.18; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References