CVE-2024-27066
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 t…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 6.6 before 6.6.23 from 6.7 before 6.7.11 from 6.8 before 6.8.2 |
Weakness classification
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
- https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
- https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
- https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100
- https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
- https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
- https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
- https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100