CVE-2022-47939: Linux Kernel ksmbd Use-After-Free Remote Code Execution Vulnerability
First published: Fri Dec 23 2022(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Kernel-devel | ||
| Linux Kernel | >=5.15<5.15.61 | |
| Linux Kernel | >=5.16<5.18.18 | |
| Linux Kernel | >=5.19<5.19.2 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2022/12/23/10
- 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
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
- 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://www.zerodayinitiative.com/advisories/ZDI-22-1690/
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.61
Frequently Asked Questions
What is the severity of CVE-2022-47939?
CVE-2022-47939 has a high severity rating due to the potential for remote code execution by attackers.
How do I fix CVE-2022-47939?
To fix CVE-2022-47939, update your Linux kernel to version 5.19.2 or later.
Which Linux kernel versions are affected by CVE-2022-47939?
CVE-2022-47939 affects Linux kernel versions from 5.15 up to 5.19.1.
Can CVE-2022-47939 be exploited remotely?
Yes, CVE-2022-47939 can be exploited remotely, allowing attackers to execute arbitrary code.
What component of the Linux kernel is impacted by CVE-2022-47939?
CVE-2022-47939 impacts the ksmbd component of the Linux kernel.
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