CVE-2022-48639 net: sched: fix possible refcount leak in tc_new_tfilter()

What is CVE-2022-48639?

CVE-2022-48639 is a medium-severity vulnerability in Linux kernel, published on 28 Apr 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:

net: sched: fix possible refcount leak in tc_new_tfilter()

tfilter_put need to be called to put the refount got by tp->ops->get to avoid possible refcount leak when chain->tmplt_ops != NULL and chain->tmplt_ops != tp->ops.

Which versions are affected by CVE-2022-48639?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-48639?

Apply the vendor's patch.

Is CVE-2022-48639 being exploited?

There is no known exploitation of CVE-2022-48639 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 DEBIAN-CVE-2022-48639, GHSA-8w8h-9f6g-7fc9, UBUNTU-CVE-2022-48639.