vhost-scsi: Validate T10 PI scatterlist counts

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74703
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:44 UTC
Updated2026-08-22 16:16:44 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bca939d5bcd00d6faea99c47eafd60bed573ef03 2417a498cf3fe64d06faf87e236eda98dd4f04e0 git Not specified
CNA Linux Linux affected bca939d5bcd00d6faea99c47eafd60bed573ef03 f8fe3f8d342da750dd10361bf66009fd3072926b git Not specified
CNA Linux Linux affected bca939d5bcd00d6faea99c47eafd60bed573ef03 d876c493fc4b811941bfeb4c80beb2dfc4bf025e git Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/2417a498cf3fe64d06faf87e236eda98dd4f04e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d876c493fc4b811941bfeb4c80beb2dfc4bf025e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f8fe3f8d342da750dd10361bf66009fd3072926b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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