CVE-2024-40903: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: fix use-after-free case in tcpm_register_source_caps There could be a potential use-after-free case in tcpm_register_source_caps(). This could happen when: * new (say invalid) source caps are advertised * the existing source caps are unregistered * tcpm_register_source_caps() returns with an error as usb_power_delivery_register_capabilities() fails This causes port->partner_source_caps to hold on to the now freed source caps. Reset port->partner_source_caps value to NULL after unregistering existing source caps.

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CVSS v3.1 Score

7.8

HIGH

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.61 — 6.1.95
linux	linux_kernel	6.6.31 — 6.6.35
linux	linux_kernel	6.9 — 6.9.6
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/04c05d50fa79a41582f7bde8a1fd4377ae4a39e5 https://git.kernel.org/stable/c/4053696594d7235f3638d49a00cf0f289e4b36a3 https://git.kernel.org/stable/c/6b67b652849faf108a09647c7fde9b179ef24e2b https://git.kernel.org/stable/c/e7e921918d905544500ca7a95889f898121ba886 https://git.kernel.org/stable/c/04c05d50fa79a41582f7bde8a1fd4377ae4a39e5 https://git.kernel.org/stable/c/4053696594d7235f3638d49a00cf0f289e4b36a3 https://git.kernel.org/stable/c/6b67b652849faf108a09647c7fde9b179ef24e2b https://git.kernel.org/stable/c/e7e921918d905544500ca7a95889f898121ba886

Other References

https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-40903? +

In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: fix use-after-free case in tcpm_register_source_caps There could be a potential use-after-free case in tcpm_register_source_caps(). This could happen when: * new (say invalid) source caps are advertised * the existing source caps are unregistered * tcpm_register_source_caps() returns with an error as usb_power_delivery_register_capabilities() fails This causes port->partner_source_caps to hold on to the now freed source caps. Reset port->partner_source_caps value to NULL after unregistering existing source caps. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-40903? +

CVE-2024-40903 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-40903? +

CVE-2024-40903 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-40903? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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