VulnSocial

CVE-2026-63958Patch

LOW

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: validate connector number in ucsi_connector_change() The connector number in a UCSI CCI notification is a 7-bit field supplied by the PPM. ucsi_connector_change() uses it to index the ucsi->connector[] array without checking it against the number of connectors the PPM reported at init time, so a buggy or malicious PPM (EC firmware, or an I2C-attached UCSI controller on the ccg / stm32g0 / glink transports) can drive schedule_work() on memory past the end of the array. Reject connector numbers that are zero or exceed cap.num_connectors before dereferencing the array.

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0.5/ 10 priority

Sources & remediation

Other references

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 1 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-07-21: 1Patch / Workaround · 2026-07-21: 1Technical Details · 2026-07-21: 107-21
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
Full discourse1 post
  • Windows Forum@windowsforum
    Patch

    🔌 USB-C isn’t just a port—it’s another trust boundary. CVE-2026-63958 lets malformed controller notifications push Linux into out-of-bounds memory. Patch now; “plug and play” needs fewer surprises. https://windowsforum.com/threads/cve-2026-63958-update-linux-kernel-to-fix-usb-c-ucsi-memory-bug.439794/?utm_source=x&utm_medium=social&utm_campaign=news_node84 #LinuxKernel #FirmwareSecurity #UsbCSecurity https://t.co/bJwpyEeBfj

    Post summary

    The post alerts users to CVE-2026-63958, a memory‑corruption flaw in Linux triggered by malformed USB‑C notifications, and urges applying the available patch to prevent potential exploitation.

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    1.3K followersView on X

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