CVE-2022-47939
CRITICALCVSS 9.8/10EPSS 46.43%
Last modified
CVE-2022-47939 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 46.43% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.15, < 5.15.61 |
| Linux | Linux Kernel | >= 5.16, < 5.18.18 |
| Linux | Linux Kernel | >= 5.19, < 5.19.2 |
References
- http://www.openwall.com/lists/oss-security/2022/12/23/10Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223cMailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223cPatch, Third Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-1690/Third Party Advisory, VDB Entry
- http://www.openwall.com/lists/oss-security/2022/12/23/10Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2Mailing List, Patch, Vendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223cMailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223cPatch, Third Party Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-22-1690/Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2022-47939?
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 a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 46.43% probability of exploitation in the next 30 days.
How do I fix CVE-2022-47939?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2022-47939?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST