Published: 23/12/2022 Updated: 16/05/2023

CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9

VMScore: 0

An issue exists in ksmbd in the Linux kernel 5.15 up to and including 5.19 prior to 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SMB2_TREE_DISCONNECT.

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DescriptionThe MITRE CVE dictionary describes this issue as: An issue was discovered in ksmbd in the Linux kernel 515 through 519 before 5192 fs/ksmbd/smb2pduc has a use-after-free and OOPS for SMB2_TREE_DISCONNECT ...

use-after-free in smb2_tree_disconnect) when a danging pointer is accessed in compound requests ...

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CWE-416 https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c http://www.openwall.com/lists/oss-security/2022/12/23/10 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://nvd.nist.gov https://access.redhat.com/security/cve/cve-2022-47939 https://support.broadcom.com/external/content/SecurityAdvisories/0/21772

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CVE-2022-47939

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