CVE-2024-44986: debian linux Use-After-Free — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in ip6_finish_output2() If skb_expand_head() returns NULL, skb has been freed and associated dst/idev could also have been freed. We need to hold rcu_read_lock() to make sure the dst and associated idev are alive.

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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
debian	debian_linux	All
linux	linux_kernel	5.4.137 — 5.4.289
linux	linux_kernel	5.10.55 — 5.10.233
linux	linux_kernel	5.13.7 — 5.15.166
linux	linux_kernel	5.16 — 6.1.107
linux	linux_kernel	6.2 — 6.6.48
linux	linux_kernel	6.7 — 6.10.7
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/3574d28caf9a09756ae87ad1ea096c6f47b6101e https://git.kernel.org/stable/c/56efc253196751ece1fc535a5b582be127b0578a https://git.kernel.org/stable/c/6ab6bf731354a6fdbaa617d1ec194960db61cf3b https://git.kernel.org/stable/c/da273b377ae0d9bd255281ed3c2adb228321687b https://git.kernel.org/stable/c/e891b36de161fcd96f12ff83667473e5067b9037

Other References

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

Frequently Asked Questions

What is CVE-2024-44986? +

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in ip6_finish_output2() If skb_expand_head() returns NULL, skb has been freed and associated dst/idev could also have been freed. We need to hold rcu_read_lock() to make sure the dst and associated idev are alive. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-44986? +

CVE-2024-44986 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-2024-44986? +

CVE-2024-44986 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-44986? +

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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