What’s Vulnerable › Vulnerabilities

CVE-2026-63961: usb: typec: altmodes/displayport: validate count before reading Status Update VDO

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-19 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: validate count before reading Status Update VDO A broken/malicious device can send the incorrect count for a status update VDO, which will cause the kernel to read uninitialized stack data and send it off elsewhere. Fix this up by correctly verifying the count for the update object.

Affected products

• Linux kernel: from 4.19 before 5.10.259; from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35 — fixed in 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.93, 6.18.35
• Linux kernel: 4.19 — fixed in 7.1

How to fix

Upgrade to a fixed version: Linux kernel 5.10.259, 5.15.210, 6.1.176, 6.6.143; Linux kernel 7.1. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/64bd6ccc5799f8473d1f37d4d8f53093dfec5c02
• https://git.kernel.org/stable/c/6ffdbcd7a02f3af8fff9b6519830369f574ed44c
• https://git.kernel.org/stable/c/70e7045849e954e56dcbf441b6330e66bc996306
• https://git.kernel.org/stable/c/74aabe9ea30fdfba924fce9594e6aa69a596a4bb
• https://git.kernel.org/stable/c/77a759ec30bc5fb0dd9c867b711d0acfed6c7faa
• https://git.kernel.org/stable/c/8a18f896e667df491331371b55d4ad644dc51d60
• https://git.kernel.org/stable/c/b10eff5abe6aa2a5af10ed17bddff76e3b6e6b9b
• https://git.kernel.org/stable/c/dd7118c010f324497c275e8fd7a35c9baaa2a00f

Get alerted when CVE-2026-63961 or the next vulnerability affects your stack