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CVE-2022-47939

Date: December 22, 2022

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. Converted from WS-2022-0420, on 2022-12-29.

Language: C

Severity Score

9.8

Related Resources (10)

Url: https://people.canonical.com/~ubuntu-security/cve/CVE-2022-47939

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

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

Url: https://nvd.nist.gov/vuln/detail/CVE-2022-47939

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

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

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

Url: https://security-tracker.debian.org/tracker/CVE-2022-47939

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

Url: https://www.mend.io/vulnerability-database/CVE-2022-47939

Severity Score

9.8

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:	9.8
Attack Vector (AV):	NETWORK
Attack Complexity (AC):	LOW
Privileges Required (PR):	NONE
User Interaction (UI):	NONE
Scope (S):	UNCHANGED
Confidentiality (C):	HIGH
Integrity (I):	HIGH
Availability (A):	HIGH

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