Use-after-free in setup_async_work()

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.

Scores

EPSS (exploitation in 30 days)

1.0% · top 36% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-416: Use After Free (opens in a new tab)All about CWE-416 and its CVEs

Affected products

• Kernel

  • unaffected 6.3-rc6

• Red Hat · Red Hat Enterprise Linux 6

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 8

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 8

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 9

  All versions: unaffected

• Red Hat · Red Hat Enterprise Linux 9

  All versions: unaffected

• Fedora · Fedora

  All versions: affected

References (3)

• https://access.redhat.com/security/cve/CVE-2023-1193 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
• RHBZ#2154177 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
• https://lkml.kernel.org/linux-cifs/[email protected]/T/ (opens in a new tab)x_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2023-1193](https://trackcve.app/badge/CVE-2023-1193.svg)](https://trackcve.app/cve/CVE-2023-1193)

Record last updated 27 Feb 2025, 20:36 UTC.