Answer in brief
CVE-2024-27066 records a High severity (CVSS 7.5) vulnerability in virtio: packed: fix unmap leak for indirect desc table. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b319940f83c21bb4c1fabffe68a862be879a6193 <e142169aca5546ae6619c39a575cda8105362100 || >=b319940f83c21bb4c1fabffe68a862be879a6193 <75450ff8c6fe8755bf5b139b238eaf9739cfd64e || >=b319940f83c21bb4c1fabffe68a862be879a6193 <51bacd9d29bf98c3ebc65e4a0477bb86306b4140 || >=b319940f83c21bb4c1fabffe68a862be879a6193 <d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd | e142169aca5546ae6619c39a575cda8105362100, 75450ff8c6fe8755bf5b139b238eaf9739cfd64e, 51bacd9d29bf98c3ebc65e4a0477bb86306b4140, d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
May 1, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.