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Diffstat (limited to 'results/classifier/108/other/782')
| -rw-r--r-- | results/classifier/108/other/782 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/results/classifier/108/other/782 b/results/classifier/108/other/782 new file mode 100644 index 000000000..f9eccc551 --- /dev/null +++ b/results/classifier/108/other/782 @@ -0,0 +1,20 @@ +device: 0.858 +vnc: 0.750 +network: 0.682 +graphic: 0.585 +semantic: 0.454 +files: 0.398 +other: 0.374 +PID: 0.351 +socket: 0.328 +boot: 0.304 +permissions: 0.144 +debug: 0.121 +performance: 0.087 +KVM: 0.076 + +nvme: DMA reentrancy issue leads to use-after-free (CVE-2021-3929) +Description of problem: +A DMA reentrancy issue was found in the NVM Express Controller (NVMe) emulation. Functions dma_buf_write() or dma_buf_read() in hw/nvme/ctrl.c:nvme_tx() can be called without checking if the destination region overlaps with device's MMIO. This is similar to CVE-2021-3750 (https://gitlab.com/qemu-project/qemu/-/issues/541) and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host. + +This issue was reported by Qiuhao Li. |