CVE-2022-47939

critical

Description

An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SMB2_TREE_DISCONNECT.

From the Tenable Blog

CVE-2022-47939: Critical RCE Vulnerability in Linux Kernel

CVE-2022-47939: Critical RCE Vulnerability in Linux Kernel

Published: 2022-12-29

A critical remote code execution vulnerability in the Linux kernel has been publicly disclosed by Trend Micro's Zero Day Initiative in its ZDI-22-1690 advisory. The vulnerability has been given a CVSSv3 of 10.0. There are no reports of active exploitation.

References

https://www.zerodayinitiative.com/advisories/ZDI-22-1690/

https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-kernel-5-15-has-a-critical-vulnerability-patch-ksmbd-immediately/

https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c

http://www.openwall.com/lists/oss-security/2022/12/23/10

https://www.tenable.com/blog/cve-2022-47939-critical-rce-vulnerability-in-linux-kernel

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c

https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2

Details

Source: Mitre, NVD

Published: 2022-12-23

Updated: 2025-04-14

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00878