CVE-2022-47939

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.

References

• https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-50672
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
• https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
• 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/