Vulnerability 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.
CVSS Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.15, < 5.15.61 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/12/23/10Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2Mailing ListPatchVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf653Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223PatchThird Party Advisory
- https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-keThird Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-1690/Third Party AdvisoryVDB Entry
- http://www.openwall.com/lists/oss-security/2022/12/23/10Mailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2Mailing ListPatchVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf653Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223PatchThird Party Advisory
- https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-keThird Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-1690/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2022-47939?
CVE-2022-47939 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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.
How severe is CVE-2022-47939?
CVE-2022-47939 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2022-47939?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.