CVE-2023-5345 Use-after-free in Linux kernel's fs/smb/client component

What is CVE-2023-5345?

CVE-2023-5345 is a high-severity use after free vulnerability in Fedoraproject Fedora, published on 3 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free vulnerability in the Linux kernel's fs/smb/client component can be exploited to achieve local privilege escalation.

In case of an error in smb3_fs_context_parse_param, ctx->password was freed but the field was not set to NULL which could lead to double free.

We recommend upgrading past commit e6e43b8aa7cd3c3af686caf0c2e11819a886d705.

Weakness: CWE-416

Which versions are affected by CVE-2023-5345?

It affects 2 products.

Products include Fedoraproject Fedora, Linux kernel.

How do I fix CVE-2023-5345?

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-2023-5345 being exploited?

There is no known exploitation of CVE-2023-5345 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as AZL-31149, AZL-31730, BELL-CVE-2023-5345, DEBIAN-CVE-2023-5345, GHSA-g488-m495-9mgj, UBUNTU-CVE-2023-5345.