CVE-2022-47939

Published: Dec 23, 2022Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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.

Affected (3)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 5.15 to 5.15.61
Linux Linux Kernel	From 5.16 to 5.18.18
Linux Linux Kernel	From 5.19 to 5.19.2

Related CWEs

CWE-416

Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (12)

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

Source: cve@mitre.org

Mailing ListThird Party Advisory

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

Source: cve@mitre.org

Mailing ListPatchVendor Advisory

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

Source: cve@mitre.org

Mailing ListPatchVendor Advisory

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

Source: cve@mitre.org

PatchThird Party Advisory

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

Source: cve@mitre.org

Third Party Advisory

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

Source: cve@mitre.org

Third Party AdvisoryVDB Entry

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