usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63959
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:14 UTC
Updated2026-07-20 07:16:41 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT A broken/malicious port can transmit a CRC-valid frame whose header advertises up to seven data objects but whose body carries fewer than that. Check for this, and rightfully reject the message, instead of reading from uninitialized stack memory.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.100200000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 6f413b559f86a2894188e082e389ff95ee428345 0af00f1459f5dd757f0d392f8caa38039561ac62 git Not specified
CNA Linux Linux affected 6f413b559f86a2894188e082e389ff95ee428345 dc17721d42e6d89f63572e63add8306a0e15eb3c git Not specified
CNA Linux Linux affected 6f413b559f86a2894188e082e389ff95ee428345 9b496e3371c04f0a03b7faa5d2442536d00e3998 git Not specified
CNA Linux Linux affected 6f413b559f86a2894188e082e389ff95ee428345 c4ab8e2d4432abb646c5c0687f8dab173da901f9 git Not specified
CNA Linux Linux affected 6f413b559f86a2894188e082e389ff95ee428345 aa2f716327be1818e1cb156da8a2844804aaec2f git Not specified
CNA Linux Linux affected 5.10 Not specified
CNA Linux Linux unaffected 5.10 semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c4ab8e2d4432abb646c5c0687f8dab173da901f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aa2f716327be1818e1cb156da8a2844804aaec2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dc17721d42e6d89f63572e63add8306a0e15eb3c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9b496e3371c04f0a03b7faa5d2442536d00e3998 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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