CVE-2023-1193 Use-after-free in setup_async_work()

What is CVE-2023-1193?

CVE-2023-1193 is a medium-severity use after free vulnerability in Linux kernel, published on 1 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A use-after-free flaw was found in setup_async_work in the KSMBD implementation of the in-kernel samba server and CIFS in the Linux kernel. This issue could allow an attacker to crash the system by accessing freed work.

Weakness: CWE-416

Which versions are affected by CVE-2023-1193?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-1193?

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-2023-1193 being exploited?

There is no known exploitation of CVE-2023-1193 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 AZL-31813, AZL-31851, DEBIAN-CVE-2023-1193, GHSA-vv37-54q4-33cj, OESA-2023-1888, OESA-2023-1889 and 4 more.