CVE-2024-46742: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()
First published: Wed Sep 18 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open() null-ptr-deref will occur when (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) and parse_lease_state() return NULL. Fix this by check if 'lease_ctx_info' is NULL. Additionally, remove the redundant parentheses in parse_durable_handle_context().
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | <6.6.51 | |
| Linux kernel | >=6.7<6.10.10 | |
| Linux kernel | =6.11-rc1 | |
| Linux kernel | =6.11-rc2 | |
| Linux kernel | =6.11-rc3 | |
| Linux kernel | =6.11-rc4 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-46742?
CVE-2024-46742 is a critical vulnerability that can lead to potential null pointer dereference in the Linux kernel.
How do I fix CVE-2024-46742?
To address CVE-2024-46742, upgrade the Linux kernel to version 6.6.51 or ensure you are using versions that are not affected.
Which versions of Linux kernel are affected by CVE-2024-46742?
CVE-2024-46742 affects Linux kernel versions from 6.7 up to but not including 6.6.51, as well as specific 6.11 release candidates.
What component in the Linux kernel is impacted by CVE-2024-46742?
CVE-2024-46742 impacts the SMB server component within the Linux kernel.
Is there a workaround for CVE-2024-46742?
There is no documented workaround for CVE-2024-46742; updating the kernel is the recommended mitigation.
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