CVE-2024-27066 (GCVE-0-2024-27066)
Vulnerability from cvelistv5
Published
2024-05-01 13:04
Modified
2026-05-11 20:09
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio: packed: fix unmap leak for indirect desc table When use_dma_api and premapped are true, then the do_unmap is false. Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed. if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } } So the indirect desc table is not unmapped. This causes the unmap leak. So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment This bug does not occur, because no driver use the premapped with indirect.
References
Impacted products
Vendor Product Version
Linux Linux Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
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