CVE-2024-39489 ipv6: sr: fix memleak in seg6_hmac_init_algo

What is CVE-2024-39489?

CVE-2024-39489 is a medium-severity denial of service vulnerability in Linux kernel, published on 10 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ipv6: sr: fix memleak in seg6_hmac_init_algo

seg6_hmac_init_algo returns without cleaning up the previous allocations if one fails, so it's going to leak all that memory and the crypto tfms.

Update seg6_hmac_exit to only free the memory when allocated, so we can reuse the code directly.

Weakness: CWE-401

Which versions are affected by CVE-2024-39489?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-39489?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2024-39489 being exploited?

There is no known exploitation of CVE-2024-39489 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-39489, DEBIAN-CVE-2024-39489, GHSA-9p6g-5797-v553, UBUNTU-CVE-2024-39489.