# CVE-2026-74703: linux: In the Linux kernel, the following vulnerability has been resolved:  vhost-scsi: Validate T10 PI scatterlist counts...

CVE-2026-74703 is fixed in linux on 1 platform by DEBIAN-CVE-2026-74703 (version 7.1.9-1), released September 4, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-74703
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 22, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  vhost-scsi: Validate T10 PI scatterlist counts  When T10 PI is negotiated, vhost-scsi splits protection bytes from the data iterator before mapping the request scatterlists. A malformed request can claim protection bytes that cover or exceed the full payload length. The former leaves no data bytes to map, while the latter underflows exp_data_len before advancing the iterator. Both cases can let a zero data SGL count reach sg_alloc_table_chained(), which triggers BUG_ON(!nents).  Reject protection lengths that cover or exceed the payload before subtracting prot_bytes and advancing the iterator. Also propagate negative errors from the protection SGL calculation before calling the allocator, matching the data SGL path.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.9-1 | [DEBIAN-CVE-2026-74703](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74703.md) | Sep 4, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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