fpga: dfl: add bounds check in dfh_get_param_size()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72158
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:33 UTC
Updated2026-08-17 06:18:16 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: fpga: dfl: add bounds check in dfh_get_param_size() dfh_get_param_size() can return a parameter size larger than the feature region because the loop bounds check is evaluated before incrementing size. If the EOP (End of Parameters) bit is set in the same iteration, the inflated size is returned without re-validation against max. This can cause create_feature_instance() to call memcpy_fromio() with a size exceeding the ioremap'd region when a malicious FPGA device provides crafted DFHv1 parameter headers. Add a bounds check after the size increment to ensure the accumulated size never exceeds the feature boundary.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.101660000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4747ab89b4a652f835494fcf8342aaa0efb9b0fd b2f6220e929b2a43605331d0139e65dc1640c05c git Not specified
CNA Linux Linux affected 4747ab89b4a652f835494fcf8342aaa0efb9b0fd 3b622aa447cf26104f96a8be39539367863bc6b6 git Not specified
CNA Linux Linux affected 4747ab89b4a652f835494fcf8342aaa0efb9b0fd 012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68 git Not specified
CNA Linux Linux affected 4747ab89b4a652f835494fcf8342aaa0efb9b0fd f3df5386e3bb54626c117bd85e0158d45fb4aea9 git Not specified
CNA Linux Linux affected 4747ab89b4a652f835494fcf8342aaa0efb9b0fd 9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a git Not specified
CNA Linux Linux affected 6.3 Not specified
CNA Linux Linux unaffected 6.3 semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b2f6220e929b2a43605331d0139e65dc1640c05c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f3df5386e3bb54626c117bd85e0158d45fb4aea9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3b622aa447cf26104f96a8be39539367863bc6b6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/012683accbb7d2bcf1264f2a0ecd6aa1dcea4d68 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9e8bc49f91f3f81d957c4f1c1f09fe94e2f88f6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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