{"id":"CVE-2026-63959","title":"usb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT\n\nA broken/malicious port can transmit a CRC-valid frame whose header\nadvertises up to seven data o…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 8a8cd4790b08c9f79ea2250b3bd933fd79f67e56","Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 0af00f1459f5dd757f0d392f8caa38039561ac62","Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < dc17721d42e6d89f63572e63add8306a0e15eb3c","Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 9b496e3371c04f0a03b7faa5d2442536d00e3998","Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < c4ab8e2d4432abb646c5c0687f8dab173da901f9","Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < aa2f716327be1818e1cb156da8a2844804aaec2f","Linux 5.10"],"published":"2026-07-19","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:27:22.431Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63959","references":[{"url":"https://git.kernel.org/stable/c/8a8cd4790b08c9f79ea2250b3bd933fd79f67e56"},{"url":"https://git.kernel.org/stable/c/0af00f1459f5dd757f0d392f8caa38039561ac62"},{"url":"https://git.kernel.org/stable/c/dc17721d42e6d89f63572e63add8306a0e15eb3c"},{"url":"https://git.kernel.org/stable/c/9b496e3371c04f0a03b7faa5d2442536d00e3998"},{"url":"https://git.kernel.org/stable/c/c4ab8e2d4432abb646c5c0687f8dab173da901f9"},{"url":"https://git.kernel.org/stable/c/aa2f716327be1818e1cb156da8a2844804aaec2f"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.05256,"ingestedAt":"2026-11-05T15:02:32.398Z","slug":"CVE-2026-63959","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: tcpm/tcpci_maxim: validate header NDO against RX_BYTE_CNT\n\nA broken/malicious port can transmit a CRC-valid frame whose header\nadvertises up to seven data objects but whose body carries fewer than\nthat.  Check for this, and rightfully reject the message, instead of\nreading from uninitialized stack memory.\n\n## Affected\n\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 8a8cd4790b08c9f79ea2250b3bd933fd79f67e56`\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 0af00f1459f5dd757f0d392f8caa38039561ac62`\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < dc17721d42e6d89f63572e63add8306a0e15eb3c`\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < 9b496e3371c04f0a03b7faa5d2442536d00e3998`\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < c4ab8e2d4432abb646c5c0687f8dab173da901f9`\n- `Linux >= 6f413b559f86a2894188e082e389ff95ee428345 < aa2f716327be1818e1cb156da8a2844804aaec2f`\n- `Linux 5.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}