CVE-2024-56600: linux kernel Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: net: inet6: do not leave a dangling sk pointer in inet6_create() sock_init_data() attaches the allocated sk pointer to the provided sock object. If inet6_create() fails later, the sk object is released, but the sock object retains the dangling sk pointer, which may cause use-after-free later. Clear the sock sk pointer on error.

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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	< 5.4.287
linux	linux_kernel	5.5 — 5.10.231
linux	linux_kernel	5.11 — 5.15.174
linux	linux_kernel	5.16 — 6.1.120
linux	linux_kernel	6.2 — 6.6.66
linux	linux_kernel	6.7 — 6.12.5

References

Advisories & Patches

https://git.kernel.org/stable/c/276a473c956fb55a6f3affa9ff232e10fffa7b43 https://git.kernel.org/stable/c/35360255ca30776dee34d9fa764cffa24d0a5f65 https://git.kernel.org/stable/c/706b07b7b37f886423846cb38919132090bc40da https://git.kernel.org/stable/c/79e16a0d339532ea832d85798eb036fc4f9e0cea https://git.kernel.org/stable/c/9df99c395d0f55fb444ef39f4d6f194ca437d884 https://git.kernel.org/stable/c/f2709d1271cfdf55c670ab5c5982139ab627ddc7 https://git.kernel.org/stable/c/f44fceb71d72d29fb00e0ac84cdf9c081b03cd06

Other References

https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Frequently Asked Questions

What is CVE-2024-56600? +

In the Linux kernel, the following vulnerability has been resolved: net: inet6: do not leave a dangling sk pointer in inet6_create() sock_init_data() attaches the allocated sk pointer to the provided sock object. If inet6_create() fails later, the sk object is released, but the sock object retains the dangling sk pointer, which may cause use-after-free later. Clear the sock sk pointer on error. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-56600? +

CVE-2024-56600 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-2024-56600? +

CVE-2024-56600 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-2024-56600? +

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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