CVE-2023-40283 Use after free in n/a

What is CVE-2023-40283?

CVE-2023-40283 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 14 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before 6.4.10. There is a use-after-free because the children of an sk are mishandled.

Weakness: CWE-416

Which versions are affected by CVE-2023-40283?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-40283?

Upgrade to a fixed version.

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-2023-40283 being exploited?

There is no known exploitation of CVE-2023-40283 in the wild and no public exploit code.

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 AZL-27936, DEBIAN-CVE-2023-40283, GHSA-cp56-rpr6-7673, UBUNTU-CVE-2023-40283.