cve-2024-27066
Vulnerability from cvelistv5
Published
2024-05-01 13:04
Modified
2024-12-19 08:53
Severity ?
EPSS score ?
0.18% (0.36839)
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100
Impacted products
Vendor Product Version
Linux Linux Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
Version: b319940f83c21bb4c1fabffe68a862be879a6193
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   Linux Linux Version: 6.6
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