CVE-2022-29581 Use after free in Kernel

What is CVE-2022-29581?

CVE-2022-29581 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 17 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper Update of Reference Count vulnerability in net/sched of Linux Kernel allows local attacker to cause privilege escalation to root. This issue affects: Linux Kernel versions prior to 5.18; version 4.14 and later versions.

Weakness: CWE-911

Which versions are affected by CVE-2022-29581?

It affects 11 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware and 5 more.

How do I fix CVE-2022-29581?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2022-29581 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-29581 exists.

Public exploit code: 2 proofs of concept on GitHub.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as A-233075473, AZL-12132, DEBIAN-CVE-2022-29581, GHSA-jr5c-f7v3-7g8c, PUB-A-233075473, UBUNTU-CVE-2022-29581 and 1 more.