Vulnerability Details : 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.
Vulnerability category: Memory Corruption
Products affected by CVE-2022-47939
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-47939
1.37%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 86 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-47939
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2022-47939
-
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-47939
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https://github.com/torvalds/linux/commit/cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
ksmbd: fix use-after-free bug in smb2_tree_disconect · torvalds/linux@cf6531d · GitHubPatch;Third Party Advisory
-
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.2
Mailing List;Patch;Vendor Advisory
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http://www.openwall.com/lists/oss-security/2022/12/23/10
oss-security - Re: Details on this supposed Linux Kernel ksmbd RCEMailing List;Third Party Advisory
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https://www.secpod.com/blog/zero-day-server-message-block-smb-server-in-linux-kernel-5-15-has-a-critical-vulnerability-patch-ksmbd-immediately/
Zero-day: Server Message Block (SMB) Server in Linux Kernel 5.15 Has a Critical Vulnerability!Third Party Advisory
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https://www.zerodayinitiative.com/advisories/ZDI-22-1690/
ZDI-22-1690 | Zero Day InitiativeThird Party Advisory;VDB Entry
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https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cf6531d98190fa2cf92a6d8bbc8af0a4740a223c
Mailing List;Patch;Vendor Advisory
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