---
title: "CVE-2026-93190: Linux Kernel - Buffer Overflow"
description: "Linux kernel contains a buffer overflow caused by lack of bounds checking on source_cap_count and sink_cap_count in cros_typec_register_partner_pdos(), letting attackers cause memory corruption by providing out-of-bounds PD cap counts, exploit requires malicious EC firmware or crafted response."
url: https://panop.io/threat-heartbeat/CVE-2026-93190/
---

# CVE-2026-93190 Linux Kernel - Buffer Overflow

Linux kernel contains a buffer overflow caused by lack of bounds checking on source\_cap\_count and sink\_cap\_count in cros\_typec\_register\_partner\_pdos(), letting attackers cause memory corruption by providing out-of-bounds PD cap counts, exploit requires malicious EC firmware or crafted response.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93190)

## Details

Type

Buffer Overflow

Impact

Denial Of Service, Remote Code Execution

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Validate PD cap counts in cros\_typec\_register\_partner\_pdos() to ensure they do not exceed PDO\_MAX\_OBJECTS; update to latest kernel version with this fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93190](https://nvd.nist.gov/vuln/detail/CVE-2026-93190)
- [https://git.kernel.org/stable/c/4e37371cb4e3b8ff564d7760029236a7bd614562](https://git.kernel.org/stable/c/4e37371cb4e3b8ff564d7760029236a7bd614562)
- [https://git.kernel.org/stable/c/54d6b0ee9b8ba434089b11843effc111dc2e6ead](https://git.kernel.org/stable/c/54d6b0ee9b8ba434089b11843effc111dc2e6ead)
- [https://git.kernel.org/stable/c/7617b210a2200b76d8f171819390468c7d189c80](https://git.kernel.org/stable/c/7617b210a2200b76d8f171819390468c7d189c80)
- [https://git.kernel.org/stable/c/a0a8cd9fc9c48b95095bcec4b146f7a99486f58e](https://git.kernel.org/stable/c/a0a8cd9fc9c48b95095bcec4b146f7a99486f58e)
- [https://git.kernel.org/stable/c/e4728288473a5024a8bdba7d43f346719606fea0](https://git.kernel.org/stable/c/e4728288473a5024a8bdba7d43f346719606fea0)
- [https://git.kernel.org/stable/c/2a7a4e45a3aa4f4ef7013eb64649f6184b76a293](https://git.kernel.org/stable/c/2a7a4e45a3aa4f4ef7013eb64649f6184b76a293)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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