hwrng: xilinx-trng - propagate timeout before any data is read

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Summary

CVECVE-2026-93157
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:11 UTC
Updated2026-09-17 17:18:11 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwrng: xilinx-trng - propagate timeout before any data is read xtrng_readblock32() polls for 16-byte chunks but returns the number of bytes read even when the first poll times out. Its caller then treats a zero return as a short successful read, and partial reads for full 32-byte blocks can make the tail copy use a fixed block offset rather than the amount already produced. Return the poll error when no data has been read, preserve partial positive returns after some data is available, stop the generator on all collection exits, and append tail bytes at the current output count.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8979744aca8096ee5072798dfc1181606919b35d 62219775a07ce0bd8085852f3d1e2d772bf6fdec git Not specified
CNA Linux Linux affected 8979744aca8096ee5072798dfc1181606919b35d bdc3b37a935f28c3e9eb2f6e889b4644d859fb08 git Not specified
CNA Linux Linux affected 8979744aca8096ee5072798dfc1181606919b35d ba088974419326daf46c5dc03e2cf6ab6ab701f7 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bdc3b37a935f28c3e9eb2f6e889b4644d859fb08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ba088974419326daf46c5dc03e2cf6ab6ab701f7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/62219775a07ce0bd8085852f3d1e2d772bf6fdec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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