CVE-2024-46741: misc: fastrpc: Fix double free of 'buf' in error path
First published: Wed Sep 18 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Fix double free of 'buf' in error path smatch warning: drivers/misc/fastrpc.c:1926 fastrpc_req_mmap() error: double free of 'buf' In fastrpc_req_mmap() error path, the fastrpc buffer is freed in fastrpc_req_munmap_impl() if unmap is successful. But in the end, there is an unconditional call to fastrpc_buf_free(). So the above case triggers the double free of fastrpc buf.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=6.2<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 | |
| Linux Kernel | =6.11-rc5 | |
| Linux Kernel | =6.11-rc6 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
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Reference Links
- https://git.kernel.org/stable/c/bfc1704d909dc9911a558b1a5833d3d61a43a1f2
- https://git.kernel.org/stable/c/e8c276d4dc0e19ee48385f74426aebc855b49aaf
- https://git.kernel.org/stable/c/f77dc8a75859e559f3238a6d906206259227985e
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46741
- https://nvd.nist.gov/vuln/detail/CVE-2024-46741
- https://launchpad.net/bugs/cve/CVE-2024-46741
- https://security-tracker.debian.org/tracker/CVE-2024-46741
- https://ubuntu.com/security/CVE-2024-46741
- https://git.kernel.org/linus/e8c276d4dc0e19ee48385f74426aebc855b49aaf
Frequently Asked Questions
What is the severity of CVE-2024-46741?
CVE-2024-46741 has been classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-46741?
To fix CVE-2024-46741, you should update the Linux kernel to the latest patched version provided by your distribution.
Which versions of the Linux kernel are affected by CVE-2024-46741?
CVE-2024-46741 affects Linux kernel versions from 6.2 up to 6.6.51 and from 6.7 to 6.10.10 as well as several release candidates of 6.11.
What impact does CVE-2024-46741 have on system security?
CVE-2024-46741 can lead to potential denial of service conditions due to incorrect memory handling in the fastrpc subsystem.
Is there a specific patch for CVE-2024-46741 available?
Yes, patches for CVE-2024-46741 have been released in recent updates, and users should apply these updates to secure their systems.
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